TECHNICAL MANUAL ULX Transmitter Series This document covers the following modulations: Analog ATSC/MH CMMB CTTB DVB-T/H DVB-T2 ISDB-T/H Revision D 888-2628-300 Harris Broadcast is an independent company not affiliated with Harris Corporation.
Harris Broadcast 9800 S Meridian Blvd, Ste 300 Englewood, CO 80112 U.S.A Copyright ©2013, Harris Broadcast. Proprietary and Confidential. This document and its contents are considered proprietary and confidential by Harris Broadcast. This publication, or any part thereof, may not be reproduced in any form, by any method, for any purpose, or in any language other than English without the written consent of Harris Broadcast. A reasonable number of copies of this document may be made for internal use only.
Technical Assistance Technical and troubleshooting assistance for Harris Broadcast products is available from the field service department during normal business hours 8:00AM to 5:00PM CST. Telephone +1‐217‐222‐8200, FAX +1‐217‐221‐7086, email tsupport@harrisbroadcast.com. Emergency service is available 24 hours a day, seven days a week, by telephone only. Online assistance, including technical manuals, software downloads, and service bulletins, is available at https://support.harrisbroadcast.com.
! WARNING: THE CURRENTS AND VOLTAGES IN THIS EQUIPMENT ARE DANGEROUS. PERSON‐ NEL MUST AT ALL TIMES OBSERVE SAFETY WARNINGS, INSTRUCTIONS AND REG‐ ULATIONS. This manual is intended as a general guide for trained and qualified personnel who are aware of the dangers inherent in handling potentially hazardous electrical/electronic circuits. It is not intended to contain a complete statement of all safety precautions which should be observed by personnel in using this or other electronic equipment.
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FIRST‐AID Personnel engaged in the installation, operation, maintenance or servicing of this equipment are urged to become familiar with first‐aid theory and practices. The following information is not intended to be complete first‐aid procedures, it is a brief and is only to be used as a reference. It is the duty of all personnel using the equipment to be prepared to give adequate Emergency First Aid and there by prevent avoidable loss of life. Treatment of Electrical Burns 1.
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Table of Contents Section‐1 Introduction Fault‐Off Interlocks (Safety Interlocks). . . . . . . . 2‐20 RF Mute External Interlock Connections (J2) . . 2‐21 Cooling System Activation . . . . . . . . . . . . . . . . . . . 2‐21 Heat Exchanger & Pump Module Start‐up. . . . . 2‐22 Charging Closed Loop Cooling System . . . . . . . . 2‐22 Initial System Leak Testing . . . . . . . . . . . . . . . . . 2‐22 Initial System Flushing. . . . . . . . . . . . . . . . . . . . . 2‐22 Cooling System Cleaning . . . . . . . . .
Table of Contents Web Browser Login Screens . . . . . . . . . . . . . . . . . 3‐6 Global Status and Navigation . . . . . . . . . . . . . . . . 3‐7 GUI Menu Structures . . . . . . . . . . . . . . . . . . . . . . 3‐8 System Home Screen For Dual Cabinets . . . . . . 3‐10 Login and Logout . . . . . . . . . . . . . . . . . . . . . . . . . 3‐10 TCU Home Screen, Single or Dual Cabinets . . . . . 3‐10 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3‐12 Drive Chain Main Menu. . . . . . . . .
Table of Contents Section‐6 Diagnostics Calibrate Cabinet Forward Sound (aural) Power5‐17 Reflected Power Calibrate . . . . . . . . . . . . . . . . . .5‐17 Calibrate System Reflected Power . . . . . . . . . .5‐18 Calibrate Cabinet Reflected Power. . . . . . . . . .5‐18 Exciter Output Calibration . . . . . . . . . . . . . . . . . .5‐19 PDU Calibration . . . . . . . . . . . . . . . . . . . . . . . . . .5‐19 System Threshold Settings. . . . . . . . . . . . . . . . . .5‐20 Exciter A & B Threshold Settings . .
Table of Contents Appendix‐d Lightning Protection Recommendation Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Environmental Hazards . . . . . . . . . . . . . . . . . . . . . What Can Be Done? . . . . . . . . . . . . . . . . . . . . . . . . AC Service Protection . . . . . . . . . . . . . . . . . . . . . . . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1‐1 Maxiva ULX Series November 11, 2013 Section-1 Introduction 1.1 1 Purpose of This Manual This technical manual contains the information pertaining to the Maxiva ULX Series, solid‐state, UHF, TV transmitter. The various sections of this technical manual provide the following types of information. • Section 1, Introduction, provides general manual layout, photos, equipment description, block diagram and general specifications.
1‐2 Section-1 Introduction November 11, 2013 Apex M2X Exciter A Apex M2X Exciter B TCU System Controller Redundant Pre‐Driver B Redundant Pre‐Driver A 18 PA Slots 11‐18 11 Redundant Drivers IPA A (slot 10) IPA B (slots 9) A B 8 PA Slots 1‐8 1 Figure 1-1 ULX Cabinet Front View Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
Maxiva ULX Series November 11, 2013 1‐3 . Main Breakers Control Breakers Coolant Hoses In/Out RF Output Line Upper 8 Way Combiner Upper 8 Way Splitter Final Reject Load 3dB Combiner Redundant Cabinet Blowers (2) Lower 8 Way Combiner Lower 8 Way Splitter Figure 1-2 ULX Cabinet Rear View 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
1‐4 Section-1 Introduction November 11, 2013 Table 1‐2 Maxiva ULX Power Output POWER OUTPUT (W) PRE‐FILTER NUMBER CABINETS NUMBER PA MODULES ATSC POST‐FILTER COFDM 470‐ 698 MHz >698 MHz 470‐494 MHz 495‐ 630 MHz 631‐ 670 MHz >670 MHz ANALOG ANALOG 1 2 2,000 1,700 1,200 1,200 1,200 1,100 3,600 3,200 1 3 3,000 2,600 1,800 1,900 1,800 1,700 5,200 5,000 1 4 4,000 3,400 2,400 2,500 2,400 2,300 7,100 6,800 1 6 6,000 5,200 3,600 3,800 3,600 3,400 10,500 10,000
Maxiva ULX Series November 11, 2013 1.2.2 1‐5 System Block Diagram Figure 1‐3 contains a system block diagram showing the basic signal flow and configuration for a single cabinet Maxiva transmitter. The block diagram shows the single cabinet, liquid cooled system with two pre‐amp modules, two driver modules and sixteen PA modules. Note that the predriver and driver modules are redundant. 1.2.
1‐6 Section-1 Introduction November 11, 2013 1.2.4.1 Graphical User Interface The TCU front panel (in PA cabinet one on multi‐cabinet transmitters) contains the graphical user interface which is a 5.25", color, 1/4 VGA, LCD, touch screen, panel PC, display. The touchscreen display uses software buttons to monitor and control the transmitter. A series of front panel pushbuttons provide immediate access to the most important commands and status information.
Maxiva ULX Series November 11, 2013 1‐7 with model and frequency). Each module weighs approximately 22 kg and can be removed while the transmitter is running. A single cabinet ULX transmitter can have 2, 3, 4, 6, 8, 10, 12, or 16 PA modules combine to achieve the power levels shown in Table 1‐2 page1‐4. A simplified block diagram of the PA module is shown in Figure 1‐5. The part number for a standard PA module is 971‐0040‐004 (without RF monitor port) or 971‐0040‐003 (with RF monitor port).
1‐8 Section-1 Introduction November 11, 2013 The diagnostic port shown in Figure 1‐6 allows the operator to connect directly to the module with a handheld PA diagnostic unit and obtain PS voltages, fault status, FWD and REF RF power levels and internal temperatures. The diagnostic port and handheld unit can also be used to reprogram the module CPLD as required. The part number for the handheld diagnostics unit kit is 971‐0040‐081. The part number for the diagnostics unit technical manual is 888‐ 2765‐001.
Maxiva ULX Series November 11, 2013 1‐9 hybrid, the second stage a two‐way 4.77dB hybrid, and the 3rd stage is a two‐way 6dB hybrid. The use of reject loads in conjunction with the hybrids allows continuous operation of the PA module in the event of a PA pallet failure. The combiner contains forward and reflected directional couplers at its output.
1‐10 Section-1 Introduction November 11, 2013 Steel Pin Figure 1-9 Modified IPA Module Rear Figure 1-10 Modified IPA Module 1.2.8 Transmitter AC Power Three phase AC mains must be supplied to the cabinets via circuit breaker CB23 and CB24 on the AC mains input assembly (A15).
Maxiva ULX Series November 11, 2013 1‐11 Transmitters with more than eight PA modules use two MOV (metal oxide varistor) boards. One MOV board is used if there are less than eight PA modules. Two types of MOV boards are used depending on AC mains voltage. Harris Broadcast MOV board part number 971‐0040‐009 is used for 208‐240VAC applications. 971‐0040‐01 is used for 380‐ 415V WYE systems. The two boards have different jumper configurations.
1‐12 Section-1 Introduction November 11, 2013 1.2.9.1 Cooling System Control Panel The cooling system control panel controls the operation of the pump module/heat exchanger, and sends fault and status information to the TCU. The cooling system control cable connects the control panel to customer I/O panel on the top of the transmitter cabinet. The pump control signals are described in the external wiring diagram 843‐5601‐705, and in the HE pump module technical manual 888‐2625‐001.
Maxiva ULX Series November 11, 2013 1‐13 Figure 1-13 HE Pump Module Figure 1-14 Heat Exchanger-Horizontal Air Flow 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
1‐14 Section-1 Introduction November 11, 2013 Figure 1-15 Heat Exchanger-Vertical Air Flow Note The heat exchanger shown in Figure 1-14 is configured for horizontal air flow .The two fans pull air through the cooling coil/fins (not visible in the photos) and exhaust it parallel with the ground. Figure 115 shows a unit configured for vertical air flow. The exhaust in the vertical air flow unit is upward.
Maxiva ULX Series November 11, 2013 1‐15 Figure 1-16 ULX Cabinet Liquid Cooling System 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
1‐16 Section-1 Introduction November 11, 2013 1.2.10 M2X Multimedia Exciter The Harris Broadcast M2X exciter is used with the Maxiva ULX Series transmitter. This exciter is described in a separate instruction book. An optional standby exciter, and drive chain switcher is available as an option. M2X configuration, editing, diagnostics and monitoring are possible using the front panel on the TCU display, or via web browser. M2X manuals vary with modulation type and are listed in Section 2.2 on page 2‐1.
Maxiva ULX Series November 11, 2013 1.3 1‐17 ULX Specifications SPECIFICATIONS Specifications are subject to change without notice. General Analog Sound Performance Frequency Range . . . . . . . . . . . . . 470 to 862 MHz Channel Bandwidth . . . . . . . . . . . 6, 7 or 8 MHz RF Load Impedance . . . . . . . . . . . 50 ohms, 1.1:1 VSWR over any single TV channel RF Output Connector . . . . . . . . . . 1-5/8 in. (4 mm), 3-1/8 in. (8 mm), 4-1/16 in.
1‐18 Section-1 Introduction November 11, 2013 Remote Control Parallel Remote . . . . . . . . . . . . . . DB-37, female Relay Contacts . . . . . . . . . . . . . . . 25 mA @ 24 VDC Digital Inputs (TTL level) . . . . . . . . Pulse duration ≥100 ms or permanent signal Ethernet/SNMP (optional) . . . . . . .
2‐1 Maxiva ULX Series November 11, 2013 Section-2 Installation 2.1 2 Introduction This section includes the information necessary for installation and initial turn on of a Maxiva ULX Series solid state, UHF TV transmitter. Due to the modular nature of the Maxiva, all models have similar installation and testing procedures. 2.2 Documentation Find and save all documentation. The top level document package number for each transmitter model is 988‐2628‐301. The transmitter document package includes: 1.
2‐2 Section-2 Installation November 11, 2013 Table 2‐1 Maxiva ULX System Drawings System Drawings 1‐Cabinet 2‐Cabinet 3‐Cabinet Schematic Document List 943‐5601‐511 943‐5601‐511 943‐5601‐511 Cover Sheet 843‐5601‐511 843‐5601‐511 843‐5601‐511 Outline Drawing 843‐5601‐279 843‐5601‐293 843‐5601‐302 Block Diagram 843‐5601‐284 843‐5601‐299 843‐5601‐299 AC Power Flow 843‐5601‐583 843‐5601‐297 843‐5601‐306 RF System Layout 843‐5601‐281 843‐5601‐295 843‐5601‐304 External Wiring 843‐56
Maxiva ULX Series November 11, 2013 2‐3 Ambient temperature and relative humidity should always range between the following limits at the cabinet installation location: • • Ambient temperature: 0 to +45oC. De‐rate 2 degrees C per 300m AMSL. Relative humidity: 0 to 95% non‐condensing Note Failure to follow these installation instructions may void the warranty. 2.
2‐4 Section-2 Installation November 11, 2013 2.7 Cooling System Installation The major components of the ULX cooling system include the TCU (pump control card), pump module/control panel, heat exchanger, and the interconnecting plumbing. The installation procedures will rely heavily on the following documentation: a. b. c. d. e. f. g. h.
Maxiva ULX Series November 11, 2013 2‐5 Table 2‐4 Line length to Capacity Conversion Factors Nominal Type M Copper Tube or Hose Size Feet to Gallons Feet to Liters Meters to Gallons Meters to Liters 1‐1/4 inch (OD hose) 0.064 0.242 0.210 0.794 1½ inch (ID tube) 0.092 0.348 0.301 1.140 2 inch (ID tube) 0.163 0.618 0.535 2.027 2½ inch (ID tube) 0.255 0.965 0.837 3.167 42 mm (OD tube) 39.6 mm (ID tube) 0.099 0.375 0.325 1.232 54 mm (OD tube) 51.6 mm (ID tube) 0.168 0.637 0.
2‐6 Section-2 Installation November 11, 2013 Caution FOR VERTICALLY MOUNTED HEAT EXCHANGERS (EXHAUST AIR PARALLEL TO GROUND ON FAN SIDE) THERE SHOULD BE NO OBSTRUCTION WITHIN TWO METERS OF THE EXHAUST SIDE OR WITHIN ONE METER OF THE INTAKE . HORIZONTALLY MOUNTED HEAT EXCHANGERS (EXHAUST AIR DIRECTED UPWARD) SHOULD HAVE NO OBSTRUCTIONS WITHIN TEN METERS OF OUTPUT EXHAUST. A method of protection from prevailing, direct wind is recommended on the exhaust side of vertical heat exchanger fans.
Maxiva ULX Series November 11, 2013 2‐7 pressure drop across the pair of devices is greatly multiplied over the restriction of individual devices. Turbulence causing devices include, but are not limited to elbows (45 and 90 degree), tees, ball valves, gate valves, globe valves, flow sensors, pipe diameter changes, and etc.
2‐8 Section-2 Installation November 11, 2013 Note Minimize the use of pipe joint compound, teflon tape and soldering flux. Overuse of these items make the system more difficult to clean. STEP 2 On long runs of pipe or hose, slope the run (toward a drain point) at a rate of 1 to 2 inches per 100 feet to facilitate draining or bleeding the system. STEP 3 Install the system (automatic) air purger, shown in Figure 5‐29 on page 5‐35, it should be installed at the highest point in supply line.
Maxiva ULX Series November 11, 2013 2.7.6 2‐9 Pump Module/Heat Exchanger Electrical Installation The electrical installation of the heat exchanger and pump module unit should be in accordance with the National Electrical Code and any local codes and regulations. The incoming AC power is either 208‐240V or 380‐415V, 3 phase 50/60Hz. Fan and pump motors are three phase. Warning DISABLE AND LOCK OUT STATION PRIMARY POWER BEFORE PRIMARY POWER CABLES ARE CONNECTED TO THE EQUIPMENT.
2‐10 Section-2 Installation November 11, 2013 Interlocks Pump Module Figure 2-1 Customer I/O Pump Module and Interlock Connector on Transmitter Caution SOME MAXIVA ULX TRANSMITTERS WILL NOT SUPPORT A WATER COOLED TEST LOAD USING WATER SUPPLIED BY THE ULX PUMP MODULE. IN THOSE CASES ONLY AIR COOLED TEST LOADS SHOULD BE USED. 2.8 Transmitter AC Connection Refer to the outline drawing top view for details on AC inputs to top of cabinet.
Maxiva ULX Series November 11, 2013 2.8.1 2‐11 Safety Ground A safety ground wire is required for each AC mains input and they should be connected to the copper ground stud shown in Figure 2‐2. The grounding stud on this panel is directly attached to the ground strap that runs from the grounding block located on the cabinet top to the ground block located inside the rear of the cabinet on the floor.
2‐12 Section-2 Installation November 11, 2013 panel on the top of the transmitter see Figure 2‐7, below must be removed for access). It will be necessary to use a straight slot screw driver to loosen the circuit breaker screws to allow insertion of the cables. Once the cable is in place tighten the screws to secure the cables firmly in place.
Maxiva ULX Series November 11, 2013 2‐13 Note There must be less than a 10% imbalance between any one phase and the average of all three phases to allow the transmitter to operate, however the phase imbalance and frequency variation must be 5% or less to meet transmitter specifications. STEP 7 2.8.3 End of procedure. Checking AC Configuration The voltage specifications on the transmitter ID panel should be compared to the supply voltages to be sure they are compatible.
2‐14 Section-2 Installation November 11, 2013 Jumper MOV TB1 Figure 2-4 Photo of MOV & TB1 Figure 2‐4 shows an AC distribution panel removed from the transmitter. TB1 in this case is for an amplifier cabinet with 8 modules or less. Note The dashed rectangles in Figure 2-5 and 2-6 indicate jumpers that need to be moved to change between 208-240V and 380-415V operation. Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
Maxiva ULX Series November 11, 2013 MOV Board 2‐15 MOV Board TB1 L1 L2 TB2 N L3 L1 L2 N L3 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 Ground Block AC Power Entrance AC Power Entrance Top View of Back of PA Cabinet, Jumpered for 208 to 240 VAC Delta or WYE MOV Board MOV Board TB1 L1 L2 TB2 N L3 L1 L2 N L3 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 Ground Block AC Power Entrance AC Power Entrance Top View of Back of PA Cabinet, Jumpered for 380 to 415 VAC WYE Figure 2-5
2‐16 Section-2 Installation November 11, 2013 MOV Board TB1 L1 L2 N L3 1 2 3 4 5 6 7 8 9 10 11 12 Ground Block AC Power Entrance AC Power Entrance Top View of Back of PA Cabinet, Jumpered for 208 to 240 VAC Delta or WYE MOV Board TB1 L1 L2 N L3 1 2 3 4 5 6 7 8 9 10 11 12 Ground Block AC Power Entrance AC Power Entrance Top View of Back of PA Cabinet, Jumpered for 380 to 415 VAC WYE Figure 2-6 TB1 and TB2 Jumpers For Single Cabinet With 1 to 8 PA Modules Copyright ©2013, Harris Broadcast
Maxiva ULX Series November 11, 2013 2.9 2‐17 Signal and Ground Connections Note Control and signal wires should never be run in the same conduit with any AC wiring. A separate conduit should be used for control/signal cables. STEP 1 Connect the video/audio (analog) or transport stream (digital) and reference inputs to the customer IO panel at the top of the transmitter (see Figure 2‐7). Refer to the tables below for exciter A and B connections which differ for analog and digital applications.
2‐18 Section-2 Installation November 11, 2013 Table 2‐6 I/O panel connections for exciter A/B‐digital Jack Connector Label J1 SMA ‐ 50 GPS (antenna) J2 BNC ‐ 50 1PPS J3 BNC ‐ 50 10 MHZ J4 BNC ‐ 75 ASI HP1 J5 BNC ‐ 75 ASI LP‐1 J6 BNC ‐ 75 310 HP‐2 J7 BNC ‐ 75 310 LP‐2 J8 BNC ‐ 75 TS Loop Out The digital TS input connectors (J4 ‐ J7) are type BNC, female. TS input connector impedances are 75 ohms.
Maxiva ULX Series November 11, 2013 2‐19 Connect sample cables from forward and reflected directional couplers (at the system output, after the filter), from reject load directional couplers, and from the PA RTAC to the customer I/O panel at the top of the cabinet. These samples are listed in Table 2‐9. These samples must be calibrated using the GUI after initial turn‐on (see "5.9 Analog Power Calibrations" on page 5‐12 or "5.10 Digital Power Calibrations" on page 5‐21).
2‐20 Section-2 Installation November 11, 2013 2.10 Intercabinet Connections For multi‐cabinet transmitter models, the intercabinet connections will need to be installed next. See External Wiring Diagram for reference. 2.11 External Interlock Connections 2.11.1 Interlock Connector on Customer I/O Panel The interlock connector (J2 with 12 pins) is located on the customer I/O panel at the top of the transmitter (see Figure 2‐10 on page 2‐21).
Maxiva ULX Series November 11, 2013 2.11.3 2‐21 RF Mute External Interlock Connections (J2) There are 2 interlock connections that can be used to apply a temporary RF mute condition (vs. a fault‐off condition as discussed above). The transmitter will RF mute when the interlock is open and automatically unmute when the interlock is restored to a close condition.
2‐22 Section-2 Installation November 11, 2013 2.12.1 Heat Exchanger & Pump Module Start‐up The electrical installation should be completed and should be in accordance with the National Electrical Code and any local codes and regulations. The incoming power supply can be 208 to 240V‐3Ph‐50 or 60Hz, or 380 to 415V‐ 3Ph‐50 or 60Hz. Exact line voltage and configuration should have been specified at the time the order was placed.
Maxiva ULX Series November 11, 2013 2.12.5 STEP 2 Closely examine the water that was drained from the system. If it is relatively clean, proceed to fill the system with the glycol/distilled water mixture. If it is dirty another fill and flush with water may be needed. Systems that are extremely dirty may need additional flushing with a cleaning solution. STEP 3 End of procedure. 2‐23 Cooling System Cleaning STEP 1 Completely drain the water from the system. STEP 2 Create cleansing solution.
2‐24 Section-2 Installation November 11, 2013 STEP 1 Fill system with distilled water. STEP 2 Run system for approximately 20 minutes. Alternate pumps A and B for 10 minutes each. STEP 3 Drain system. Drain valves must be opened at each low point in the system, along with the vent valves at the system high points, to ensure full drainage. STEP 4 Repeat above steps (flushes) until coolant is clear of contaminants and detergent residue. Typically two or three distilled water flushes are needed.
Maxiva ULX Series November 11, 2013 2.13 2‐25 Install PA & IPA Modules STEP 1 Be sure the PA module breakers (in rear of cabinet as shown in Figure 2‐11) are in the OFF position. Figure 2-11 PA & IPA (driver) Module Circuit Breakers Warning THE PA MODULES ARE LARGE AND RELATIVELY HEAVY, WEIGHING APPROXIMATELY 22KG. (49 LBS) CARE SHOULD BE TAKEN TO AVOID PERSONAL INJURY AND/OR DAMAGE TO THE MODULES. 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
2‐26 Section-2 Installation November 11, 2013 STEP 2 Prior to inserting modules remove all packing surrounding the connectors in rear of the PA cabinet and on the PA modules. Visually inspect the connectors in the cabinet and on the module back to be sure they are undamaged and free of debris of any kind. STEP 3 Refer to the factory test data to identify which modules go in which slot location. Refer to the outline drawing to identify slot numbers and module numbering.
Maxiva ULX Series November 11, 2013 2.14 2‐27 Initial Transmitter Setup Read and understand the entire initial turn‐on procedure before starting. Detailed use of GUI screens is described in Section‐3 Operation. STEP 1 Insure that the 3 phase AC mains has been connected to the transmitter and cooling system. Be ready to quickly disconnect the power if necessary. STEP 2 Engage the primary AC breaker switch(es) CB23 & CB24 on the AC Mains Input Assembly at the rear of each transmitter cabinet.
2‐28 Section-2 Installation November 11, 2013 . Measured Voltage Reference Voltage Figure 2-13 Power Supply Screen Press the FAULTS button to check for power supply faults. There should be no red indications or faults present. If a fault is present, see Section 6, Diagnostics for more information.The PS Faults screen is shown in Figure 2‐14. STEP 6 Note A COMMON FAULT IS A 3 PHASE SEQUENCE FAULT, INDICATING THE 3 PHASES HAVE BEEN CONNECTED IN THE WRONG SEQUENCE.
Maxiva ULX Series November 11, 2013 2‐29 Figure 2-14 PS Faults Screen 2.15 STEP 7 Customize the transmitter System Setup. System>System Service>System Setup on the GUI. The System Setup screen displays the settings for System Pwr Out, Center Frequency (visual carrier for analog systems), Modulation Type, AC Line Volt (VAC), Number of exciters, Number of Cabinets and External RF Switch. Touch the screen at each field to enter the data pertinent to the setting.
2‐30 Section-2 Installation November 11, 2013 Note Actual flow rate may deviate from recommended depending on site specifics like pipe diameter, number of elbows, and run length. The flow rate must be above the trip point level in order to prevent frequent faults and pump switches. .
Maxiva ULX Series November 11, 2013 2.16 2‐31 M2X Exciter Setup See M2X exciter manual to set exciter parameters. There are several versions of M2X manuals depending on modulation type. M2X exciter manual part numbers are listed in Section 2.2 on page 2‐1. DVB‐T modulation requires a valid transport stream to allow RF output. If a transport stream is not available then the PRBS test mode can be activated via the M2X modulator screens.
2‐32 Section-2 Installation November 11, 2013 Figure 2-15 Power Amps Screen STEP 8 See Figure 2‐15. All IPAs and PAs should show a green (OK) or white (indicating Off) status indication on the GUI (Power Amps screens). Figure 2-16 Output Screen STEP 9 Copyright ©2013, Harris Broadcast Slowly bring up the transmitter power, by pressing the Raise button on front panel, to the nominal value, as indicated by the Cab Fwd Pwr value and by mesurement using an external power meter.
Maxiva ULX Series November 11, 2013 2‐33 STEP 10 Adjust cabinet phasing (in multi‐cabinet systems) to reduce power into the cabinet combiner reject loads. Inter‐cabinet phasing is accomplished via the GUI (navigate to the Home>Output>Phase screen) to adjust the preamplifier module phasing in each cabinet relative to the other cabinets to reduce power to common reject loads.
2‐34 Section-2 Installation November 11, 2013 External Parallel remote control units can interface at the Customer I/O Board at the top of the cabinet. J13 through J17 are for remote Control, Status and Analogue readings. The connectors are organized as follows: • J3, J4 and J5 ‐ Remote Transmitter Control Functions • J6, J7 and J8 ‐ Remote Status Outputs • J9 ‐ Remote Analogue Metering Outputs Note The forward slash (/) in front of a signal name means active low.
Maxiva ULX Series November 11, 2013 2‐35 Table 2‐12 J3, J4 & J5, Customer I/O Board, Remote Control Connectors Connector and pin # Function Command Type and Polarity J5‐1 J5‐2 Power Control Auto Select Pulsed LOW J5‐3 Power Control Manual Select Pulsed LOW J5‐4 GROUND J5‐5 RF Switch A Select Pulsed LOW J5‐6 RF Switch B Select Pulsed LOW J5‐7 GROUND J5‐8 NC J5‐9 NC J5‐10 NC J5‐11 NC J5‐12 NC 2.18.
2‐36 Section-2 Installation November 11, 2013 Table 2‐13 J6, J7 & J8 Customer I/O Board, Remote Status Outputs Connector and pin # Status Output Status Type and Polarity J7‐3 RF Switch A/B Active Status L= B ON H= A ON J7‐4 Power Control AUTO/MANUAL L= AUTO H= MANUAL J7‐5 GROUND J7‐6 RF MUTE ON/OFF L= RF MUTE ON H= RF MUTE OFF J7‐7 VSWR FOLDBACK ON/OFF L= ON H= OFF J7‐8 GROUND J7‐9 VSWR FAULT L=FAULT H= OK J7‐10 Transmitter Faulted OFF L= Fault OFF H= OK J7‐11 GROUND J7‐12 GROU
Maxiva ULX Series November 11, 2013 2.18.4 2‐37 Remote Power Metering, J9 Each analog metering output will provide 0 ‐ 4.096Vdc output into a 400 ohm load (where 3Vdc = full scale). The connections for J9 are listed in Table 2‐14. Table 2‐14 J19, External I/O Board, Remote Power Metering Connection 2.18.
2‐38 Section-2 Installation November 11, 2013 JP4 & JP5 Emergency Stop Jumpers Figure 2-18 Underside of Customer I/O Board 2.19 Install Battery in TCU PCM Card When the transmitter is ready for operation install the real time clock battery on the TCU PCM card. This battery maintains the time and date when the transmitter loses AC power. Refer to "5.14.5 Changing the PCM Card Battery" on page 5‐39.
Maxiva ULX Series November 11, 2013 2.20.1.1 2‐39 TCU Ethernet Access via PCM Card RJ45 Connector TCUs equipped with later version PCM‐2 cards (post‐March 2012 units) have two front panel RJ45 Ethernet connectors. The lower connector is used for connection from the PCM card, via a small CAT5 jumper, to the TCU front panel touch screen mini‐PC. The second (upper) RJ45 connector is available and can be connected via Ethernet cable to a local computer.
2‐40 Section-2 Installation November 11, 2013 Figure 2-19 LPU SNMP Setup Screen The SNMP setup screen allows location setting for connection identification, destination IP address for trap messages, R/W community, Enable/Disable of Set commands, Port, selection of V1 or V2 traps and deletion of IP addresses. 2.21.2 Supported MIBs As of this printing, the Harris Broadcast ULX transmitter can serve out three different MIBs: • • • 2.21.
Maxiva ULX Series November 11, 2013 2‐41 2.21.5Harris Broadcast SMI (Structure of Managed Information) Harris Broadcast Transmission SMI Harris Broadcast Transmitters branch OID: 1.3.6.1.4.1.290.9.2.1 iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).harris(290).bcd2(9).transmission(2) Figure 2-20 Harris Broadcast SMI Block Diagram 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
2‐42 Section-2 Installation November 11, 2013 Figure 2-21 MIB 2 Description Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
3‐1 Maxiva ULX Series November 11, 2013 Section-3 Operation 3.1 3 Introduction This section gives detailed operational information for the Maxiva ULX Series Solid‐State UHF TV transmitter. Information will pertain mostly to the operation and navigation of the TCU graphical user interface (GUI) touchscreen display. Note Operation of the M2X exciter is covered in a separate manuals which ships with the transmitter. 3.
3‐2 Section-3 Operation November 11, 2013 on page 2‐38. Before accessing the transmitter via remote web browser interface the factory default password must be changed locally using the front panel PC touchscreen. 3.2.2 TCU ‐ Initial Login & Passwords There are three TCU password levels: • Administrator: Allows one user access to change passwords. • Engineer: Two users can access the TCU each using a different Engineer level password.
Maxiva ULX Series November 11, 2013 STEP 6 Press the appropriate boxes to set the Engineer 1 and 2 usernames and passwords. STEP 7 Record the newly selected usernames and passwords for future reference. Should the admin password be forgotten or lost contact Harris technical support to obtain assistance. The contact information is provided on page iii. STEP 8 Enter the desired Timeout by pressing the Timeout window and entering the value in minutes .
3‐4 Section-3 Operation November 11, 2013 Table 3‐1 TCU Control Buttons Button Power Control States Explanation Auto/Manual Auto: Automatic power level control activated. The transmitter RF output power is held to the level established by the FWD PWR REF setting. Manual: The power level can be manually raised or lower using the Power Raise or Power Lower buttons. Enables or disables remote control of the transmitter.
Maxiva ULX Series November 11, 2013 3.2.4 3‐5 TCU Cards ‐ Resets and Memory Cards PCM Reset MCM Reset Figure 3-4 TCU Front Panel Lowered There are two power supply cards located on the left side of the TCU chassis and seven or eight cards to the right side of the PSs. The boards are numbered 1 through 8, right to left.
3‐6 Section-3 Operation November 11, 2013 3.3 Graphical User Interface (GUI) The GUI ("Gooey") was designed to provide an intuitive interface into the transmitter control system. The GUI is accessible locally via the TCU front touchscreen panel or remotely via web browser interface to the TCU. Once you become familiar with content, finding information is simply a matter of following the screens to the desired section of the transmitter.
Maxiva ULX Series November 11, 2013 3‐7 Table 3‐3 Login Parameters TCU & LPU Unit Username Password TCU Administrator admin admin (default, must be set by user, see Section 3.2.2, on page 3‐2). TCU Engineer 1 Set by user. Set by user. TCU Engineer 2 Set by user. Set by user. TCUs allow for two simultaneous engineer level users. TCU usernames, passwords, and access time can be set and changed by Administrator login. See Section 3.2.2, TCU ‐ Initial Login & Passwords, on page 3‐2. 3.3.
3‐8 Section-3 Operation November 11, 2013 b. Transmitter Forward power output reading in numerical format (for multiple cabinet transmitters this would be a system power reading and not for a single cabinet). It is important to note that this is the power output after the filter. c. Transmitter Forward power output reading in a bargraph format. The 100% mark is based on the nominal power level or TPO (Transmitter Power Output) entered into the configuration screen.
888‐2628‐300 System Power Supply Output Power Amps Fig 3‐9, Pg 3‐11 H O M E T C U Drive Chain Event log Fig 3‐10, Pg 3‐12 C H A I N Fig 3‐13, Pg 3‐15 Drive Chain Meters A M Faults P S Phase Faults S U P P L Y Faults WARNING: Disconnect primary power prior to servicing.
3‐10 Section-3 Operation November 11, 2013 3.3.5 System Home Screen For Dual Cabinets There are two home screens. • Figure 3‐8 is the System Home screen used for dual cabinet systems. • Figure 3‐9 is the TCU Home screen used for single cabinet systems. The HOME icon (shown to the right) is a software button located in the upper left quadrant of most screens. The quickest way to access the HOME screen is to press the HOME icon on a screen.
Maxiva ULX Series November 11, 2013 3‐11 Event Log, Figure 3‐10 on page 3‐12 To Figure 3‐11 on page 3‐13 To Figure 3‐14 on page 3‐15 To Figure 3‐16 on page 3‐17 To Figure 3‐19 on page 3‐18 To Figure 3‐21 on page 3‐19 Figure 3-9 ULX-TCU Home Screen The Home screen also has the global status and operation information at the top of the screen which shows the transmitter status, power output and any faults present. There are five touchscreen navigation buttons on the right side of the GUI Home display.
3‐12 Section-3 Operation November 11, 2013 Note To simplify the discussion of GUI navigation, the following sections describe the screens under the five main menu buttons located on the right side of the GUI TCU Home screen. 3.4.1 Event Log An event log soft key is present at the top of each screen. The event log gives a list of transmitter and system events, warnings and faults in the order in which they occurred.
Maxiva ULX Series November 11, 2013 3.5 3‐13 Drive Chain Main Menu If you press the Drive Chain button on the HOME screen, it will take you to the screen shown in Figure 3‐11. The drive chain menu structure is shown in Figure 3‐7 on page 3‐9. To Figure 3‐12 To Figure 3‐13 To Figure 3‐9 Figure 3-11 Drive Chain Screen Table 3‐5 TCU Drive Train Screen Status Indicator States Summary Status Exciter A and Exciter B Green/Yellow/Red This is a summary of the following: 1.
3‐14 Section-3 Operation November 11, 2013 2. Exciter A/B ‐ These buttons select operational exciter. To use these buttons, place the Auto/ Manual button to Manual, then press the A or B button to select the on‐air exciter. d. Pre‐Driver/IPA Control box (located at the bottom of the screen on the right). This dual driver has 2 switches: 1. Auto/Manual ‐ This toggle button should always be in the Auto position for normal operation.
Maxiva ULX Series November 11, 2013 3.5.2 3‐15 Drive Chain Meters When the "Meters" button in Figure 3‐12 is pressed, it will bring up the screen shown in Figure 3‐13. This screen displays input and output information for exciters and pre‐driver/IPA units. Current values for the pre‐driver and IPA’s are also given. To Figure 3‐12 To Figure 3‐11 Figure 3-13 Drive Chain Meters Screen 3.
3‐16 Section-3 Operation November 11, 2013 a. OK ‐ Green background b. Fault ‐ Red background c. OFF ‐ The background is gray. The On/Off field can be used to toggle individual amplifier modules on or off as needed. Note Always be sure that you are accessing the desired cabinet number. The cabinet being viewed is indicated in the upper left corner of the screen. To get detailed information on a particular PA Module, press the Faults button on the right section of the screen.
Maxiva ULX Series November 11, 2013 3‐17 To Figure 3‐17 To Figure 3‐18 Cabinet Indicators To Figure 3‐9 Figure 3-16 Output Screen The main Output screen is has 3 main areas: • Power Amplifier Cabinet ‐ Amplifier cabinet icons (triangle) give a status indication of OK (green) or Fault (red). • RF Output Cabinet & System ‐ These panels give the forward, reflected and aural (analog only) power levels, measured before and after the filter. The cabinet output panel also gives the ALC voltage level. 3.7.
3‐18 Section-3 Operation November 11, 2013 3.7.2 Output Phasing Multiple PA cabinet systems require proper phasing of the cabinet outputs in order to combine efficiently. This phasing is accomplished by minimizing the power going to the combiner reject loads. Proper output phasing is accomplished by adjusting the cabinet output phases. The predriver phase and gain boards control the cabinet phasing. Adjustments are made using the screen below. To Figure 3‐16 Figure 3-18 Cabinet Phasing Screen 3.
Maxiva ULX Series November 11, 2013 3.8.1 3‐19 PS Faults The PS (power supply) Faults screen provides power supply status for the AC mains and low voltage power supplies. An active fault will be highlighted in red, while a warning condition will be highlighted in yellow. For a detailed explanation of these faults, refer to Section 6, Diagnostics. To Figure 3‐19 Figure 3-20 PS Faults Screen 3.
3‐20 Section-3 Operation November 11, 2013 : Table 3‐7 TCU Home >System Field CAB1 Explanation Provides coolant temperatures, air temperatures and coolant flow (liters per minute). The CAB1 block also provides the status of the RF Mute and Safety Interlocks. Interlocks can read Open (red background) or Closed (gray background) Pump Status Pump icon has a green background color if no faults are present or a red background color if faults are active.
Maxiva ULX Series November 11, 2013 3.9.2 3‐21 System Software And Hardware Version Screen The left side of Figure 3‐23 shows the software revisions for the TCU controllers. The right side of Figure 3‐23 shows the hardware version for the TCU controllers. This information should be available before calling for technical support. Table 3‐8 provides space to write in the version numbers for your transmitter.
3‐22 Section-3 Operation November 11, 2013 3.9.3 System Service The System Service screen allows setting of several parameters that involve date and time. See Figure 3‐24 and Table 3‐9 for details. To Figure 3‐25 To Figure 3‐29 To Figure 3‐32 To Figure 3‐36 To Figure 3‐21 Figure 3-24 System Service Screen (Remote/Local) Table 3‐9 TCU Home >System>Service Field Explanation Station Name Enter station call or site name. This can be up to 24 characters and will appear at the top of each GUI screen.
Maxiva ULX Series November 11, 2013 3‐23 Table 3‐10 TCU Home>System>Service>System Setup Field Explanation System (Forward) Pwr Out (W) Set this value to the system nominal power output. This value determines the 100% level on the GUI power out bar. Center Freq (MHz) Enter the center frequency (digital systems) or visual frequency (analog systems) for the desired operational channel. This sets the transmitter and exciter frequencies. In a dual exciter system, it will set both exciters.
3‐24 Section-3 Operation November 11, 2013 3.9.3.1.2 System Thresholds The System Thresholds screen is used to set the various RF levels which will generate a warning or fault. To Figure 3‐25 Figure 3-27 System Thresholds Screen Table 3‐11 TCU Home>System>Service>Setup>Thresholds Field Foldback Power Explanation This is the system reflected power level which causes power foldback to start. The maximum value that can be entered here is 2.78% of nominal power. Note: When set to 2.
Maxiva ULX Series November 11, 2013 3.9.3.1.3 3‐25 Saved Settings The System Setup Entry button allows storage of up to eight setups (0 through 7) for the purpose of N+1 operation. All the settings and calibrations for the transmitter are saved in the MCM module. This means the transmitter can change to any one of eight channels and be fully calibrated by simply recalling the set up entry.
3‐26 Section-3 Operation November 11, 2013 3.9.3.2 Cabinet Setup The cabinet power levels, low power warning, number of PAs, and the number of liquid cooling pumps is set in the cabinet setup screen. To Figure 3‐30 To Figure 3‐31 To Figure 3‐24 Figure 3-29 Cabinet Setup Screen Table 3‐12 TCU Home>System>Service>System Setup>Cabinet Setup Field Explanation Cab FWD Pwr Out (W) Set cabinet nominal output power here. This is the power out of the cabinet before the combiner or filter.
Maxiva ULX Series November 11, 2013 3.9.3.2.1 3‐27 Cabinet Power Calibrate See Sections "5.9 Analog Power Calibrations" on page 5‐12 and "5.10 Digital Power Calibrations" on page 5‐21 for procedures that utilize this screen. To Figure 3‐29 Figure 3-30 Cabinet Power Calibrate Screen The Cal boxes can be selected to open up a keyboard entry screen. The VSWR Enable and Disable buttons are used during reflected power calibration. The process is described in Section 5. 3.9.3.2.
3‐28 Section-3 Operation November 11, 2013 3.9.3.3 System Network Screen This screen provides information about computer network settings. MAC, Mode (Static or DHCP), IP, Netmask, Gateway and DNS Source settings are given. Enter values specific to your environment. To Figure 3‐33 To Figure 3‐35 To Figure 3‐24 Figure 3-32 System Network Screen Table 3‐13 TCU Home>System>System Service>Network Field Hostname Explanation Label that identifies transmitter on network router.
Maxiva ULX Series November 11, 2013 3.9.3.3.1 3‐29 SNMP Configuration To Figure 3‐34 To Figure 3‐32 Figure 3-33 SNMP (Simple Network Management Protocol) Config screen Table 3‐14 TCU Home>System>Service>Network>SNMP Config Field Explanation Port Enter the port number to be used. Choices are 161 and 8170 through 8179. Port 161 is the default. Protocol Choice is ’UDP’ or ’TCP’. RO (read only) Community This is a user defined password which allows a ’set’ to be performed. Default is ’private’.
3‐30 Section-3 Operation November 11, 2013 3.9.3.3.2 SNMP MIBs A MIB is a pre‐defined Management Information Database using the SNMP protocol. To Figure 3‐33 Figure 3-34 SNMP MIBs Three MIBs can be selected: • Transmitter Base is a database which is common to all Harris transmitters, and would therefore be the usual default choice. • IRT is a German standard database which Harris supports. It covers DVB (digital video broadcast) or DAB (dig‐ ital audio broadcast).
Maxiva ULX Series November 11, 2013 3.9.3.4 3‐31 Software Management Figure 3-36 Software Management PCM And MCM Screens Figure 3-37 Software Management Upload And Backup Screens Figure 3-38 Software Management Reset Screen 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
3‐32 Section-3 Operation November 11, 2013 Table 3‐16 TCU Home>System>System Service>Software Management Field Explanation View Activate Delete Explanation Activate Delete Explanation Upload Browse Pull Down Menu Run Restart Reboot Copyright ©2013, Harris Broadcast Explanation PCM Tab, Figure 3‐36 Left Side The software version which is highlighted yellow is the active PCM card software. The rows in blue represent other PCM software versions.
4‐1 Maxiva ULX Series November 11, 2013 Section-4 Theory 4.1 4 Introduction This section contains detailed descriptions of the Maxiva ULX Series transmitter, its internal sub‐assemblies and any pertinent information regarding the external assemblies such as the pump module and heat exchanger. The rest of this section will be broken up into 4 main topics: • • • • 4.1.
4‐2 Section-4 Theory November 11, 2013 4.3 AC Distribution Three phase AC mains must be supplied to the PA cabinets via circuit breaker CB23 and CB24 on the AC mains input assembly (A15). The transmitter can accept 208‐240VAC (Delta or WYE) or 380‐415VAC (WYE) by changing jumpers or connections in four areas: • Terminal boards TB1 and TB2 are in the AC distribution panel. The TB1 and TB2 Jumpers are described in Sec‐ tion 2.8.3, Checking AC Configuration, on page 2‐13.
Maxiva ULX Series November 11, 2013 4‐3 The TCU in the main cabinet contains a PCM (processor control module) which acts as the transmitter interface. However, a depopulated TCU is present in each added PA cabinet. The MCM card monitors the power sample from its cabinet and issues the proper voltage to the predrivers to maintain the cabinet power regulation. This ALC loop resides in each cabinet. There is no System ALC Loop.
4‐4 Section-4 Theory November 11, 2013 4.4.3 TV Sync Distribution The TV sync signal is routed from the exciters to J5 and J6 on the down converter board, which is located inside the main and PA cabinets on the ceiling. In the down converter board, the sync from the on air exciter is routed to sync output connectors J7, J8, and J9. From J7, the sync is routed to the IPA and PA backplanes to provide peak of sync detection for the IPA and PA modules.
Maxiva ULX Series November 11, 2013 4.4.4.2 4‐5 PCM Card The TCU in each cabinet also contains a PCM (processor control module) card. The PCM card contains the ARM based micro module running embedded Linux OS. The PCM allows use of an optional 5.25" color 1/4 VGA GUI panel PC touch screen for enhanced monitoring and control.
4‐6 Section-4 Theory November 11, 2013 4.4.4.3 RF Detector/Pump Control/Interlocks Card The RF detector/pump control/interlocks card is located in the TCU. It is made up of a main and daughter board. The card contains seven RMS detectors with adjustable trips set by EPOTS (electronic potentiometers). Pump control and interlock wiring is combined on one D25 pin connector J3. For analog transmitters the card also serves as an interface to the analog down converter board via another D25 connector J2.
Maxiva ULX Series November 11, 2013 4‐7 Table 4‐1 RF Detector/Pump Control/ Interlocks Card Connector J3 Pinout Pin Signal 1 CABINET_SAFETY_INTLK Description 2 CABINET_RF_MUTE_INTLK 3 SYSTEM_SAFETY_INTLK 4 SYSTEM_RF_MUTE_INTLK Input ‐ Active high, cabinet safety interlock Input ‐ Active high, cabinet RF mute interlock Input ‐ Active high, system safety interlock Input ‐ Active high, system RF mute 5 PUMP_ON_CMD 6 PUMP_SWITCH_CMD Output ‐ Active high to turn on selected pump 7 PUMP_INTLK
4‐8 Section-4 Theory November 11, 2013 4.4.4.4 PA Interface Card The PA interface card(s) connects the TCU, Predriver assembly, IPA (driver) and PA backplane boards. The interface features 40 digital outputs/inputs and 24 analog outputs/inputs. A fully populated cabinet will require two PA interface cards, one card per eight PA modules. The PA interface card sends the ON/OFF commands to the PA modules and receives fault information and status from them.
Maxiva ULX Series November 11, 2013 4.4.4.4.1 4‐9 Predriver and IPA Drive A and B Busses The Drive A and Drive B busses provide control and monitoring of the predriver and IPA modules A and B. These busses run from connectors J3A and J3B of PA interface board A4A7 to connectors on the predriver assembly and the IPA backplane board, see Figure 4‐6. Table 4‐3 provides the connections for these busses.
4‐10 Section-4 Theory November 11, 2013 4.4.4.5 Customer I/O Card The primary function of the Customer I/O Card is to interface between the internal transmitter control system and all external or peripheral devices.The customer I/O card is located in the TCU and is connected to the Customer I/O board connectors J13 and J14 inside the cabinet top. For more detail on the customer I/O connections which can be found on the customer I/O board on the top of the cabinet refer to section 4.
Maxiva ULX Series November 11, 2013 4‐11 Table 4‐5 Exciter A Control/Status Connector J1A on TCU (9 pin female dsub) Pin Signal Description 1 /EXC_A_MUTE_CMD Open collector output‐ Exciter A mute command‐100mA sink capability @ 0.8Vdc max. 1K ohm pull up to +5V. TVS protection. Active’0’ state to command exciter mute. 2 /EXC_A_EQUALIZER_HOLD_CMD Open collector output‐ Exciter A equalizer hold command‐100mA sink capability @ 0.8Vdc max. 1K ohm pull up to +5V. TVS protection.
4‐12 Section-4 Theory November 11, 2013 4.4.4.7 PS Monitor Card The PS monitor card is located in the TCU. The board’s primary function is to provide AC power supply monitoring, fuse monitoring, inlet and outlet temperature sensing, coolant flow, leak detection, cooling fan tachometer monitoring, and PA Driver switch interface. A simplified block diagram for the board is given in Figure 4‐8.
Maxiva ULX Series November 11, 2013 4‐13 Table 4‐7 AC1 MOV1 Connector J4A (25 pin stacked female dsub) Pin Signal Description 1 /MOV_SENSE CMOS input ‐MOV board sense status‐’0’ on this line indicates the MOV board is present. TVS protection. 1K pull up to +5Vdc 2 +15Vdc +15Vdc @ 200mA maximum limited by 0.2A PTC. 3 ‐15Vdc ‐15Vdc @ 200mA maximum limited by 0.2A PTC.
4‐14 Section-4 Theory November 11, 2013 4.4.5 CPLD (Complex Programmable Logic Device) Each PA (power amplifier) module contains a CPLD (Complex Programmable Logic Device) device. The CPLD is not a microprocessor but is a pre‐programmed discrete logic device and therefore very stable and reliable. The CPLD’s in the PA modules are responsible for reporting faults back the TCU and also for taking action when the ON/STBY command is issued by the TCU. 4.4.
Maxiva ULX Series November 11, 2013 4‐15 Table 4‐9 Life Support Functionality System Function Available in Life Support Mode Description Remote Metering Not available due to web loss but available on parallel remote. NO/YES Basic Parallel Remote Control YES Basic Parallel Status Lines YES Exciter Parallel Control YES Exciter Serial Communications YES Web Connectivity NO 4.4.
4‐16 Section-4 Theory November 11, 2013 4.4.8 System Bus The system control bus is a twenty five conductor ribbon cable which distributes the CAN (Controller Area Network) bus and parallel control lines from the MCM card in cabinet one to other MCM controllers in a multi cabinet system. If system bus communications with the master TCU (in cabinet 1) are interrupted, the cabinet bus, drive A and B busses, and BP1 through BP4 busses allow each cabinet to operate independently.
Maxiva ULX Series November 11, 2013 4‐17 Table 4‐12 PA Module Power Supply Output Voltage Control 4.4.10 PA_Voltage_ Select Voltage Power Supply Output Voltage 5.755 Vdc 44Vdc 4.122 Vdc 46 Vdc 2.490 Vdc 48 Vdc 0.875 Vdc 50 Vdc Parallel Control Lines The parallel control lines are used for quick actuation of critical functions, such as ON, OFF, RF mute, PS adjust, and Fault Off.
4‐18 Section-4 Theory November 11, 2013 4.5 Customer I/O Board The customer I/O board is located on top of the main cabinet and provides parallel remote control, status and meter outputs. There are 20 command inputs, 20 status inputs, 8 analog inputs and 8 analog outputs. See Section 2.18 on page 2‐33 for additional information and details on the remote control connectors available on the customer I/O board. Input/Output (I/O) ports on the Customer I/O Board include: • J1 Pump Module see Section 2.7.
Maxiva ULX Series November 11, 2013 4‐19 Figure 4-10 Predriver Module Photo (module removed from Predriver assembly) The predriver assembly holds two predriver modules. The modules are redundant and hot swappable. See photo in Figure 4‐10 to aid in identification of predriver module components. The single rack unit predriver assembly has one RF input and two RF outputs, see Figure 4‐11 on page 4‐20 for a schematic orientated block diagram of the predriver assembly.
4‐20 Section-4 Theory November 11, 2013 AC Filter Connector and Switch FL2 Interface Interconnect Board Board 801-0222-261 801-0222-271 AC DC J4 Sync Input J4 J2 J3, DC and Control DC and Control J3 J1 RF CD2007 Out Amplifier J1 Edge Con.
Maxiva ULX Series November 11, 2013 4‐21 The CD2007 output amplifier board and the phase and gain board receive their power from the power supply board mounted on the tray. This power supply produces 28 Vdc at 4.5 amps maximum. The phase and gain board provides a continuously variable phase change of 180 degrees, which is used to combine multiple PA cabinets. It also has an attenuator, driven by the transmitter’s ALC (automatic level control) circuit, which has a 0 to 15 dB variable range.
4‐22 Section-4 Theory November 11, 2013 The PA and IPA (driver) modules are identical in systems with more than 8 PA modules. In transmitters with eight or less PA module the IPAs are modified (simplified). Modified IPA modules cannot be installed in PA module slots due to a pin on the rear of the IPA module (see Figure 1‐9 on page 1‐10). For additional information. block diagram, and photos of PA module see 1.2.6 on page 1‐6. For additional information.
Maxiva ULX Series November 11, 2013 See Figure 416 for details of connector J! AC Power TB1 J10 56P TB2 J1 4‐23 J11 AC Distribution Board A2 801-0222-021 J12 J9 J1 J2 J3 J4 J5 J6 J7 J8 J1 J1 J1 J1 J1 J1 J1 J1 PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PFE500-48 PWR Supply PS Board A3 PS Board A4 PS Board A5 PS Board A6 PS Board A7 PS Board A8 PS Board A9 PS Board A10 8
4‐24 Section-4 Theory November 11, 2013 4.6.3.1 AC Distribution Board The AC distribution board consists of three identical groups of AC line filtering, two stages of transient protections per filter section. First stage of the protection is formed by a network of MOVs which connects to the AC line filter inputs. The second stage of protection provides a hard voltage limits by using high energy TVS devices, which are connected at the output of each filter section.
Maxiva ULX Series November 11, 2013 4‐25 Table 4‐14 PA Module Power Supply Output Voltage Control PA_Voltage_ Select Voltage Power Supply Output Voltage 5.755 Vdc 44Vdc 4.122 Vdc 46 Vdc 2.490 Vdc 48 Vdc 0.875 Vdc 50 Vdc The Bold line represents the Cabinet Bus path. IPA Backplane Board 801-0222-131 Standard IPA modules are the same as the PA Modules, therefore, the voltage J4-B5 select signal path is the same as shown for the PA module.
4‐26 Section-4 Theory November 11, 2013 Figure 4-15 AC/DC Converter Interface Block Diagram 4.6.3.4 PA Monitor Board The PA Monitor Board controls and monitors the PA module’s operation. All analog parameters of the power amplifier are monitored and evaluated via the analog comparators to generate the OK/FAULT logic signal, and the signal is sent to a CPLD device to realize a pre‐defined control logic algorithm.
Maxiva ULX Series November 11, 2013 4‐27 Table 4‐15 PA Module Front panel LED Indications Index LED Color Indication 1 Green ON‐OFF 2 Red LDMOS Failure 3 Red P.S. Failure When one or more PS failed 4 Red Temp Fault When one or more Pallet temp fault 5 Red VSWR Fault Reflected Power Overload 6 Red Power Overload Input/Output Power Overdrive/ Overload 7 Green Input Power OK OK: Green; Input Power Low: Red 4.6.3.
4‐28 Section-4 Theory November 11, 2013 4.6.3.6 Signal Distribution Board Signal Distribution Board serves to route analog and digital control and monitoring data between 4 other board subassemblies, such as: • • • • 4.6.3.7 Monitor Board Four PA Pallets I/O Connector Board 4‐way splitter board PA Module Phase Alignment PA modules do not require phase alignment to optimize combining of modules.
Maxiva ULX Series November 11, 2013 4‐29 Figure 4-17 PA Pallet Simplified Block Diagram 4.6.3.10.1 FET Bias The LDMOS FET’s used in the Maxiva ULX pallets have been designed by the manufacturer to maintain the factory bias characteristics without the need for re‐biasing in the field. The idle current for each FET is set at the factory to approximately 1 amp. Variations between FET idle currents should be less than 10%. 4.6.
4‐30 Section-4 Theory November 11, 2013 4.8.1 RF Block Diagram A schematic orientated block diagram of the Maxiva 16 Module transmitter is shown in Figure 4‐18 on page 4‐31. The exciter switcher (located in the TCU assembly) selects one exciter for on the air, the other one is connected to a load. Following the exciter switcher is a three way splitter, which provides RF drive for up to three PA cabinets. From the three way splitter, the RF goes to the predriver assembly.
Maxiva ULX Series November 11, 2013 Exciter: APEX-M2X Analog Mode separate manual RF drive for 2nd 2K unit RF drive for 3rd 2K unit J5 Exciter Switcher J4 (In TCU) J8 801-0221-141 3-Way Splitter, SP3, Page 3 of Main Cabinet Drawing 843-5601-001 Predriver Assembly (A12) 843-5601-062 IPA Backplane A7 801-0222-131 Exciter: APEX-M2X Analog Mode separate manual 888-2624-005 4‐31 J3 IPA Module A 843-5601-012 IPA Module B J4 843-5601-012 4 4 8-Way Splitter SP5 These blocks are shown on the Main Cabinet
4‐32 Section-4 Theory November 11, 2013 Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
5‐1 Maxiva ULX Series November 11, 2013 Section-5 Maintenance 5.1 5 Introduction This section contains all of the maintenance and alignment procedures for the Maxiva ULX Series UHF transmitter. This includes routine maintenance, PA module replacement, PA module repair, transmitter calibration and PC board replacement procedures. 5.2 PA Module Removal and Replacement Caution TOXIC BERYLLIUM SOME COMPONENTS IN THE MODULE CONTAIN TOXIC BERYLLIUM.
5‐2 Section-5 Maintenance November 11, 2013 5.2.1 PA Slot Locations The number and location of PA modules will vary depending on transmitter model. The following table outlines the slots that contain PA modules in various configurations. Table 5‐1 PA Slot Allocations for Single Cabinet Models Slot No.
Maxiva ULX Series November 11, 2013 5.2.2 5‐3 PA Module Removal Apex M2X Exciter A Apex M2X Exciter B TCU System Controller Redundant Pre‐Driver A Redundant Pre‐Driver B 18 PA Slots 11‐18 11 A B Redundant Drivers IPA A (slot 10) IPA B (slot 9) 8 PA Slots 1‐8 1 Figure 5-1 PA Module Location See Figure 5‐1 to identify module numbers and their locations in the cabinet.
5‐4 Section-5 Maintenance November 11, 2013 STEP 4 STEP 5 Wait 30 seconds for module to cool. Use a screwdriver (Phillips) to loosen and remove the screws that hold the module in the rack. There is one screw on each side of the module. Pull the module halfway out of the rack, then reposition hands to the sides of the module to better support the weight (22 kg). Remove the module from the rack. End of procedure.
Maxiva ULX Series November 11, 2013 5.2.4 5‐5 Operation With Inoperative PA Modules The PA module reject loads, located inside the module combiner, are sized with enough margin to allow operation under any imbalance condition that may be encountered. As long as one module is installed and operational the transmitter will continue to produce RF power but at reduced levels (depending on how many modules are removed). 5.2.
5‐6 Section-5 Maintenance November 11, 2013 Note The system was drained to avoid leaking at this connection when the clamp is loosened. Loosening the clamp allows the upper and lower manifolds to move relative to each other. Alignment Shims STEP 6 Using the top and bottom modules in each half as alignment fixtures, place a 0.02"‐ 0.03" thick shim on the cabinet PA shelf guides for a top and bottom module.
Maxiva ULX Series November 11, 2013 5.4 5‐7 PA Module Phasing Phasing of the PA modules is tightly controlled at the factory. No phasing of the modules is required in the field. PA modules and IPA (driver modules, used in transmitter cabinets with 10 to 16 PA modules) can be used in any location without re‐phasing. Modified IPA modules, used in PA cabinets with 8 or fewer PA modules, do not require phasing either but can only be used in IPA module slots.
5‐8 Section-5 Maintenance November 11, 2013 Table 5‐2 PA Module Test Connector Pin Out and Typical Voltages Pin Signal Pin Pin Signal Pin 1 /ON‐OFF STATUS (0V ‐4.9V) 2 PS8 VOLTAGE (3.8V) 27 P3 FET 1 CURRENT (.3V) 28 GND 3 PS VOLT SELECT (44=5.15V, 46=4.12V, 48=2.49V, 50= .87V) 4 GND 29 P3 FET 2 CURRENT (.3V) 30 CANH (3.2V) 5 AVG INPUT POWER (.012V) 6 +12V (11.9V) 31 P4 FET 1 CURRENT (.3V) 32 CANL (0V) 7 GND 8 +12V (11.9V) 33 P4 FET 2 CURRENT (.
Maxiva ULX Series November 11, 2013 STEP 1 5‐9 Turn off PA module breaker. Warning MODULE MAY BE HOT. ALLOW THE MODULE TO COOL BEFORE REMOVAL. STEP 2 Wait 30 seconds for the module to cool. STEP 3 Unscrew retaining screws and remove PA module. STEP 4 Remove PA module cover. STEP 5 Remove four (4) center pallet hold down screws (Allen head). STEP 6 Remove five (5) additional pallet hold down screws (Phillips head). STEP 7 De‐solder two jumpers and the blue & gray DC supply wires.
5‐10 Section-5 Maintenance November 11, 2013 Note PS board fuse is 8A 250V fast blow. STEP 1 Turn off PA module breaker. Warning MODULE MAY BE HOT. ALLOW THE MODULE TO COOL BEFORE REMOVAL. STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP STEP 5.7.2 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Allow the module to cool for 30 seconds. Unscrew retaining screws and remove PA module. Remove PA module cover. Remove four (4) PS hold down screws (Phillips screws).
Maxiva ULX Series November 11, 2013 5.8 5‐11 ALC Voltage Adjustment The cabinet ALC voltage is displayed on the Output screen as shown in Figure 5‐7. At full TPO (and thoroughly warmed up) the ALC voltage should be in the 3.2 to 3.6 V range (closer to 3.6 V is more desirable). ALC voltage is used to adjust the electronic attenuator in the PDU to raise or lower power.
5‐12 Section-5 Maintenance November 11, 2013 5.9 Analog Power Calibrations Other than system forward & reflected calibrations during installation, power calibration should be required only if the down converter board, the RF detector board (in TCU), or if a directional coupler or signal cable is replaced. However, calibration is simple and can be done whenever it is deemed necessary. The only required power calibrations are: a. b. c. d. e. f. g. h.
Maxiva ULX Series November 11, 2013 5.9.1.1 5‐13 Average and Peak Conversion Formula and Examples Average Power = Peak Visual Power * Factor Peak Visual Power = Average Power / Factor Example 1: Calculate the average power of a System M transmitter operating at 1000W peak visual with an aural injection level of ‐10dB. Factor for System M with ‐10dB aural injection = 0.695 Average Power = 1000W * 0.
5‐14 Section-5 Maintenance November 11, 2013 Forward Coupler Reflected Coupler Figure 5-8 Typical Output Power Coupler 5.9.2.1 Calibrate System Forward Visual Power STEP 1 STEP 2 Calibrate the power meter following manufacturers instructions. Set the meter offset to the value printed on the coupler, or as supplied with a data sheet included with the factory test data. Remove the sample cable from the system forward directional coupler (after filter) to be calibrated (see Figure 5‐8).
Maxiva ULX Series November 11, 2013 STEP 9 STEP 10 STEP 11 STEP 12 STEP 13 5‐15 Allow the transmitter to run for several minutes to give the amplifiers time to warm up and stabilize. Verify that the sync ratio is correct for the desired operating system. The sync level is set in the M2X exciter. Typical sync level for PAL is 300 mV and 40 IRE units for NTSC. Readjust output power if sync. level is readjusted. Press the manual button on the TCU and hold it in for 5 seconds.
5‐16 Section-5 Maintenance November 11, 2013 Note Be sure to enter the incident (forward) coupler’s offset into the power meter. Different couplers will have different coupling values. The coupling values also change with frequency. STEP 3 End of procedure. Figure 5-10 Cabinet Power Calibrate Screen (Analog) Reflected Coupler Forward Coupler Figure 5-11 Cabinet Coupler 5.9.2.
Maxiva ULX Series November 11, 2013 STEP 3 STEP 4 STEP 5 STEP 6 STEP 7 STEP 8 STEP STEP STEP STEP STEP 9 10 11 12 13 5.9.2.4 5‐17 Turn on and adjust transmitter to 100% rated visual peak power as indicated on the GUI bar graph. Remove the sample cable from the system forward directional coupler to be calibrated (see Figure 5‐13).
5‐18 Section-5 Maintenance November 11, 2013 5.9.3.1 Calibrate System Reflected Power Note Before attempting reflected calibration forward (visual and aural) calibration must be confirmed. STEP 1 Turn on and adjust transmitter to 100% rated visual peak power as measured with an averaging power meter. . Set video input signal to 50% flat field (gray) and turn sound carrier on. Press System>System Service>System Setup>System Calibrate to view the GUI screen shown in Figure 5‐9 on page 5‐15.
Maxiva ULX Series November 11, 2013 STEP 1 5‐19 Repeat the above procedure using the internal (cabinet) forward and reflected coupler samples (see Figure 5‐11 on page 5‐16) to calibrate the reflected power at the cabinet output. Note The detector level should be between 2-3V at rated visual forward power when the reflected cable is attached to the forward port with a 10 dB pad. If there are pads on the forward port to start with they should not be included with the added 10dB pad.
5‐20 Section-5 Maintenance November 11, 2013 STEP 9 Select the other predriver and repeat the procedure to calibrate the other predriver power output. STEP 10 End of procedure. Figure 5-1 Cab Pwr Calibrate Screen 5.9.6 System Threshold Settings Figure 5-12 System Threshold Setting Screen Table 5‐4 System>System Service>System Setup>System Threshold Field Explanation Foldback Pwr Sets pwr level (Watts) where power foldback begins. Maximum value is 2.8% of nominal output power, for a VSWR of 1.4:1.
Maxiva ULX Series November 11, 2013 5.9.6.1 5‐21 Exciter A & B Threshold Settings Exciter A and B detector levels should be approximately 2.7V. This assumes a 200mW (analog) out (black picture no setup on NTSC). These detector values will vary dramatically with normal picture transmission. Exciter A and B threshold levels can be set using the following steps: STEP STEP STEP STEP 1 2 3 4 Set the exciter to nominal output 200 mW peak visual, black picture.
5‐22 Section-5 Maintenance November 11, 2013 Forward Coupler Reflected Coupler Figure 5-13 System Coupler 5.10.1.1 Calibrate Forward Total Power STEP 1 STEP 2 STEP STEP STEP STEP STEP STEP STEP STEP Calibrate the averaging power meter following manufacturers instructions. Set the meter offset to the value printed on the coupler, or as supplied with a data sheet included with the factory test data.
Maxiva ULX Series November 11, 2013 5‐23 Figure 5-14 Sys Pwr Calibrate Screen STEP 12 Click on the corresponding Cal window for Sys Fwd power, opening a numeric entry box. STEP 13 Enter the measured power out (in kW). STEP 14 Press DONE to store the changes, or CANCEL to ignore all changes made. STEP 15 Press the Auto power control button to enable ALC. STEP 16 End of procedure. 5.10.1.
5‐24 Section-5 Maintenance November 11, 2013 Reflected Coupler Forward Coupler Figure 5-15 Cabinet Coupler 5.10.2 Reflected Power Calibration This procedure establishes the values used to calculate the VSWR protection thresholds for foldback and fault events. These values are based on the "Fwd Pwr Out (W)" value entered into the System Setup screen in Figure 3‐25 on page 3‐22.
Maxiva ULX Series November 11, 2013 STEP 5 STEP 6 5‐25 Attach a a 10 dB pad to reflected sample cable (along with existing attenuators). Remove the 50 ohm terminator from the opposite coupler port and place it on the reflected port. Place the reflected cable (with 10 dB pad) on the port where the terminator was removed. This essentially attaches the reflected cable (with 10 dB pad) to a forward sample port.
5‐26 Section-5 Maintenance November 11, 2013 5.10.3 Exciter Output Calibration STEP 1 STEP 2 Turn on the transmitter and adjust to licensed power. With the exciters operating, use the web browser to access each exciter GUI and record the output levels for exciters A and B (if present). These exciter levels were calibrated at the factory. The transmitter GUI exciter output is calibrated on the Sys Pwer Calibrate screen.
Maxiva ULX Series November 11, 2013 5.10.5 5‐27 System Threshold Settings Figure 5-16 Threshold Setting Screen Table 5‐5 System>System Service>System Setup>System Threshold Field Explanation Foldback Pwr Sets pwr level (Watts) where power foldback begins. Maximum value is 2.8% of nominal output power, for a VSWR of 1.4:1. For a 6kW digital transmitter this corresponds to a reflected power level of 168W. Fwd Low Flt Sets power level where power bar turns red and a fault is entered into the log.
5‐28 Section-5 Maintenance November 11, 2013 5.11 PA Cabinet Fan Replacement There are two 230V AC 50/60Hz fans in the Maxiva cabinet. They get their AC power from the control breakers on power distribution panel. Note Deactivating the control breakers will turn off the cabinet fans but they also will disable the TCU and exciters. The cabinet fans operate continuously whenever the transmitter is on.
Maxiva ULX Series November 11, 2013 5‐29 Remove Figure 5-18 Fan Bracket Hardware STEP 4 Fan enclosure can now be removed from the cabinet angling the rear of the unit toward the center of the cabinet and pulling it out through the door opening. Note The fan capacitor is located inside the fan enclosure. Fan Capacitor Figure 5-19 Fan Capacitor (inside fan enclosure) STEP 5 STEP 6 5.12 Reverse the process to replace the fan. End of procedure.
5‐30 Section-5 Maintenance November 11, 2013 5.12.1 RF System Removal STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 Turn off the transmitter. Remove all power and turn off main breakers AC1 and AC2. Disable remote operation to prevent transmitter from being reactivated. Remove the cabinet fan assemblies. The fan removal sequence is described in section 5.11 on page 5‐28. Loosen the clamp that holds the output coax in the flange (see Figure 5‐20 on page 5‐ 30).
Maxiva ULX Series November 11, 2013 STEP 7 STEP 8 STEP 9 5‐31 Lift the output coax line (the line above the coupler) upward taking care to disconnect and support the inner conductor. Lift the inner and outer upward through the top of the cabinet. Store the coaxial line section in a safe location. Loosen the clamp that holds the hybrid combiner reject port elbow in place while supporting the back to back elbow assembly and the reject load.
5‐32 Section-5 Maintenance November 11, 2013 Reject Load Clamp Elbow Figure 5-24 Reject Load Elbow. STEP 11 Remove the sample cables from the directional coupler at the output of the hybrid combiner. STEP 12 While supporting the weight of the hybrid combiner/coax RF system loosen the clamps on outer conductor sleeves at the output of the lower and then the upper module combiners. Slide the coaxial sleeves to the right to expose the inner conductor.
Maxiva ULX Series November 11, 2013 5‐33 Figure 5-26 Hybrid Combiner/Coaxial RF System Figure 5-27 Cabinet with RF System Removed STEP 14 Reverse the procedure to reinstall the cabinet RF system. STEP 15 End of procedure. 5.13 Cooling System Maintenance Inspect the coolant level and check for leaks frequently. 5.13.1 Heat Exchanger Cleaning The heat exchanger fins should be examined for dust and dirt buildup monthly.
5‐34 Section-5 Maintenance November 11, 2013 5.13.2 Alternate Pumps Every one or two months select the opposite pump in order to keep both pumps in a proper working state. Switching the pumps can be accomplished via the GUI screen (with pump module in REMOTE mode) by navigating to TCU HOME> SYSTEM then pressing the button for the inactive pump. This can also be done with the pump module in LOCAL by turning the desired pump switch to the on position. 5.13.
Maxiva ULX Series November 11, 2013 5‐35 Strainer Assy. Screen Plug/Drain. Figure 5-28 Strainer Assembly. 5.13.5 Coolant Level Management: The Maxiva cooling system is a closed (pressurized) system. The system contains a pressurized expansion tank with a bladder that separates the system coolant from pressurized air. The expansion tank is pressurized at the factory and should not need pressurization on site.
5‐36 Section-5 Maintenance November 11, 2013 5.13.6 Coolant Maintenance The pH level of the 50/50 glycol/water mixture should be above 8.0. A PH level that is below 8.0 indicates that the inhibitors in the glycol are ineffective. Should the PH level of the mixture drop below 8.0 either additives must be added or the coolant should be changed. The PH level should be checked quarterly with either pH paper or with a pH meter.
Maxiva ULX Series November 11, 2013 5.13.9 5‐37 Air Filter Replacement Monthly inspection and cleaning of the air filter is recommended. The filter can be easily removed from the rear door without tools. Figure 5-30 Filter in Rear Door STEP 1 Open cabinet rear door to eliminate suction on filter material. STEP 1 Grasp filter material or filter frame with fingers and lift upward until filter frame clears the lower edge of the door opening. Pull lower part of filter through the door opening.
5‐38 Section-5 Maintenance November 11, 2013 5.13.10 Leak Detector and Cabinet Drains A leak detector is installed at the bottom of the cabinet. The leak detector is shown in Figure 5‐1 on page 5‐38. It is mounted in the bottom cabinet near the center. The leak detector consists of a small reservoir with a float. The TCU monitors this leak detector to alert the system should a leak occur. A leak detection will cause the transmitter and the pump to be shut off by activating the pump interlock signal.
Maxiva ULX Series November 11, 2013 5.14.3 5‐39 Panel PC Touch Screen Calibration The GUI touchscreen has been calibrated at the factory. Should calibration become necessary, the calibration screen can be accessed by switching the TCU panel PC touch screen display off for fifteen seconds then back on. The on/off rocker switch is shown in Figure 5‐32 and is located behind the TCU front panel, on the lower left side of the panel PC display unit, behind the filter material.
5‐40 Section-5 Maintenance November 11, 2013 The PCM card contains a battery that is used for the real time clock in the TCU. The battery powers real time clock circuitry to maintain the clock time/date when the unit does not have AC power applied. The unit is typically shipped with the battery removed from the PCM card. The battery should be installed before the transmitter goes into operation.
Maxiva ULX Series November 11, 2013 5‐41 Caution TCU CARDS ARE NOT HOT SWAPPABLE. THE TRANSMITTER SHOULD BE OFF AND THE POWER DISCONNECTED FROM THE TCU BEFORE REMOVAL OF CARDS. STEP 2 STEP 3 STEP 4 Use the finger hole cut outs built into the sides of the TCU front panel as handles, pull outward and down on the front cover. Remove four rack mounting fasteners from the each sides of the TCU front. Pull the TCU chassis out of the rack as far as the slides allow.
5‐42 Section-5 Maintenance November 11, 2013 Figure 5-36 TCU Pivoted Downward Note Use a stool or step ladder to allow easier access to the top of the TCU unit if needed. STEP 7 Locate the battery holder on the PCM‐1 card. Location is shown in figure 5‐37.
Maxiva ULX Series November 11, 2013 5.14.6 5‐43 TCU Card Replacement Should it become necessary to change cards in the TCU use the following procedure: STEP 1 Go to the System>Service>Version screen and note the revision levels of the PCM and MCM cards if they are going to be changed. Turn off the transmitter and disconnect power from the transmitter cabinet or disconnect the AC plug(s) from the rear of the TCU.
5‐44 Section-5 Maintenance November 11, 2013 5.14.8 TCU PS Module Maintenance and Replacement The TCU PS Modules (front) are shown in Figure 5‐33 on page 5‐39. The PS modules supply the required voltages to the TCU cards and front panel. The PS modules are not hot pluggable. The TCU power supply modules should be checked periodically to be sure that there is not excessive dirt built up on the fan cover. If dirt build up is evident use a vacuum cleaner to clean off the front cover.
Maxiva ULX Series November 11, 2013 5.14.9 5‐45 TCU Air Filters The TCU front panel contains two filters (943‐5600‐109)that should be inspected periodically for dust buildup. Lower the TCU front panel, use a #2 Phillips screwdriver to remove the four TCU chassis mounting screws, and pull the TCU out of the rack using built in slides. Then use a #1 Phillips screwdriver to remove the six screws that hold the front panel to the front panel chassis.
5‐46 Section-5 Maintenance November 11, 2013 5.
Maxiva ULX Series November 11, 2013 5‐47 Table 5‐6 Recommended Test Equipment Equipment Type Adapters and connectors Attenuator 888‐2628‐300 Manufacturer Model Number Options Type N to BNC, male to female Type N to BNC, female to male BNC barrel, female to female BNC barrel, male to male SMA to BNC, male to female SMA to N, male to female SMB (push on) to BNC SMC to BNC, screw on jack to plug BNC to TNC, jack to plug BNC to TNC, jack to jack TNC to N, plug to jack TNC to N, jack to plug 10 dB atten
5‐48 Section-5 Maintenance November 11, 2013 5.16 Typical Digital Test Equipment Table 5‐7 Recommended Test Equipment Equipment Type Manufacturer Frequency measurement Miscellaneous Test Equipment Optional Adapters and connectors Adapters and connectors Attenuator Copyright ©2013, Harris Broadcast Options Harris Part No.
6‐1 Maxiva ULX Series November 11, 2013 Section-6 Diagnostics 6.1 6 Introduction This section contains diagnostic and troubleshooting information for the ULX series UHF transmitter. Included is a description of faults which can be displayed via the transmitter front panel TCU display or web GUI (Graphical User Interface).
6‐2 Section-6 Diagnostics November 11, 2013 c. BACK ‐ Will take you back to the TCU Home menu. Note Tables 6-1 and 6-2 lists transmitter faults. They also give a brief description of each fault, the trip point and the transmitter action taken in response to the fault. These initials, as shown, allow viewing of their log entries. Clicking on a letter darkens it and removes its log entry category. Categories are: A = Active Faults & Warnings. C = Cleared Faults & Warnings.
Maxiva ULX Series November 11, 2013 • • • • • • • • • • • • • • • 6.
6‐4 Section-6 Diagnostics November 11, 2013 Table 6‐2 PA and IPA Module Fault List TYPE Fault Level or Threshold Description Transmitter Action Three Strike Available in Life Support Temperature Temperature fault Pallet temp >90oC. Monitor temp >65oC. Red LED. No RF out YES of module. YES VSWR VSWR fault Reflected power > 160W average (digital). Red LED. No RF out YES of module. YES Overload (including Input Power Overdrive) Power overload (including input power overdrive) Input >55.
Maxiva ULX Series November 11, 2013 6‐5 Table 6‐4 Output Faults List TYPE Description Fault Level or Threshold Transmitter Action Three Strike Available in Life Support Cabinet VSWR (Reflected Power Fault) Cabinet Reflected Power Trip point is set at VSWR = has exceeded 10% of rated 1.9:1. Trip point adjustable power by epot RF MUTE, Fault OFF after 3‐ strike. The Time interval YES between strikes should be about 3 seconds YES System VSWR (Reflected Power Fault) Trip point is set at VSWR = 1.
6‐6 Section-6 Diagnostics November 11, 2013 Table 6‐5 System Faults List TYPE Description Fault Level or Threshold Transmitter Action Three Strike Available in Life Support Air Temp Ambient control enclosure 65°C air temperature has exceeded 65°C. The source of this temp can be from the temp sensor in the MCM module for instance.
7‐1 Maxiva ULX Series November 11, 2013 Section-7 Parts List 7 Guide to Using Parts List Information The Replaceable Parts List Index portrays a tree structure with the major items being left most in the index. The example below shows the Transmitter as the highest item in the tree structure. If you were to look at the bill of materials table for the Transmitter you would find the Control Cabinet, the PA Cabinet, and the Output Cabinet.
7‐2 Section-7 Parts List November 11, 2013 7.
Maxiva ULX Series November 11, 2013 Table 7‐1 MAXIVA ULX 16PA FORMAT TRANSMITTER ‐ 9950228001G (AN) Part Number 472 1888 000 556 0179 150 774 0156 080 774 0156 081 774 0156 086 774 0156 115 774 0156 220 880 0228 001 917 2416 969 943 5276 184 952 9253 017 952 9253 018 952 9253 019 952 9253 020 952 9253 021 952 9253 022 952 9253 058 971 0023 183 971 0040 003 971 0040 004 971 0040 020 971 0040 033 971 0040 037 971 0040 059 971 0040 075 971 0040 081 971 0040 095 981 0147 001 981 0147 002 981 0222 012 981 041
7‐4 Section-7 Parts List November 11, 2013 981 0202 002 981 0202 003 981 0202 004 483 0170 000 483 0180 000 483 0190 000 483 0200 000 483 0210 000 483 0220 000 483 0230 000 483 0290 000 484 1025 000 Table 7‐2 Part Number 624 0004 200 774 0156 082 774 0156 084 843 5607 072 021 7510 003 359 1573 000 943 5585 257 358 0473 000 971 0040 092 358 2179 000 358 3945 000 358 3946 000 358 3481 100 Table 7‐3 Part Number 063 1030 021 086 0004 038 086 0004 047 086 0026 000 358 2179 000 774 0156 082 774 0156 083 843 5
Maxiva ULX Series November 11, 2013 Table 7‐5 Part Number 003 4010 082 250 0443 000 253 0059 000 464 0381 000 618 0511 100 620 0818 000 620 2174 000 620 2938 000 Table 7‐6 Part Number 612 1350 000 843 5601 012 943 5601 427 943 5601 638 952 9253 015 9710040004WI 971 0040 100 Table 7‐7 KIT, ULX/VLX SYSTEM WIRING ‐ 943 5276 184 (E) Description CU, STRAP 0.020 X 2" X 50 CABLE, 12C 20AWG STRD CABLE, 2C 22AWG AUDIO TOOL, ACTUATION, WAGO 2.
7‐6 Section-7 Parts List November 11, 2013 943 5601 046 943 5601 047 943 5601 048 943 5601 061 943 5601 101 943 5601 125 943 5601 126 943 5601 128 943 5601 130 943 5601 137 943 5601 230 943 5601 388 943 5601 392 943 5601 430 952 9253 001 952 9253 006 FENCE, PALLET SHIELD FENCE, RF DIVIDER COVER, PA MODULE WASHER, SHOULDER FENCE, PALLET SHIELD PANEL, SIDE WALL, RIGHT PANEL, SIDE WALL, LEFT PANEL, FRONT WALL COVER, SOLDER SHIELD, COMBINER TRITON PA MODULE BODY, 7/8" RF PLUG MODULE 7/8 CONDUCTOR, CENTER INS
Maxiva ULX Series November 11, 2013 384 1157 000 386 1543 000 404 0910 001 416 0006 000 494 0579 000 508 0636 000 RECT FAST, 8ETH06 (TO220) DIODE, TVS (BIDIR) 20KPA180CA HEATSINK,TO‐220 1.5"HT COMMON MODE IND, 2.5MH 12.
7‐8 Section-7 Parts List November 11, 2013 Table 7‐12 Part Number 088 0012 000 843 5601 012 880 0040 100 943 5601 122 943 5601 129 9710040004WI 971 0040 100 Table 7‐13 Part Number 168‐806‐000 620 3014 000 943 5601 171 Table 7‐14 Part Number 026 6010 002 358 3637 000 606 1136 080 ASSEMBLY, MAXIVA ULX PA MODULE ‐ 971 0040 004 (R) Description TAPE 3M #483 POLYETHYLENE 2''W WIRING DIAGRAM, PA MODULE TP, AUTOMATED TEST FOR FULL ULX PA COLDPLATE ASSY, ULX PA MODULE PANEL, FRONT, PA MODULE WI, ULX PA MODULE A
Maxiva ULX Series November 11, 2013 Table 7‐18 Part Number 026 6010 002 358 3637 000 606 1136 080 DUAL CIRCUIT BREAKER ASSEMBLY, 380‐415V ‐ 971 0040 037 (T) Description GROMMET STRIP, 0.
7‐10 Section-7 Parts List November 11, 2013 Table 7‐22 Part Number 303 6106 016 310 0009 000 315 0021 060 430 0397 000 646 0665 000 708 0055 000 843 5607 717 843 5607 719 943 5607 720 971 5607 013 9810147001WI 988 2852 001 990 0160 016 943 5607 583 943 5607 582 943 5607 584 943 5607 585 943 5607 579 350 0105 000 303 6108 018 311 0012 080 315 0021 080 Table 7‐23 Part Number 303 6106 016 310 0009 000 315 0021 060 430 0397 000 646 0665 000 708 0055 001 843 5607 717 843 5607 719 943 5607 720 971 5607 013 981
Maxiva ULX Series November 11, 2013 354 0763 001 358 1314 000 358 3025 000 359 1875 000 432 0573 000 610 1296 000 620 2605 000 620 3254 000 620 3318 000 628 0017 000 628 0020 000 702 0002 000 843 5601 612 943 5601 170 943 5601 217 943 5601 228 943 5601 600 943 5601 601 943 5601 602 943 5601 603 943 5601 606 943 5601 640 952 9265 111 952 9265 112 971 0040 081 981 0222 016 981 0223 001 981 0223 002 988 2764 001 Table 7‐25 *LUG QC FEMALE 187 12‐10AWG YEL 15 EA *HOSE CLAMP, SST, SAE‐10 4 EA HOSE BARB, 0.
7‐12 Section-7 Parts List November 11, 2013 620 0499 000 620 0544 000 620 0581 000 620 0918 000 620 2275 000 620 3008 000 620 3750 000 646 1483 000 646 1701 000 646 1773 000 700 1422 042 792 0247 000 843 5601 001 9010222101G 917 2567 017 943 5560 052 943 5601 049 943 5601 088 943 5601 089 943 5601 091 943 5601 097 943 5601 145 943 5601 146 943 5601 169 943 5601 170 943 5601 192 943 5601 218 943 5601 232 943 5601 238 943 5601 239 943 5601 391 943 5601 397 943 5601 445 943 5601 460 943 5601 466 943 5601 593
Maxiva ULX Series November 11, 2013 971 0053 420 981 0293 012 981 0400 001 Table 7‐26 Part Number 335 0486 000 359 1591 000 359 1875 000 398 0489 000 398 0496 000 398 0586 000 398 0777 001 448 0868 000 510 0794 000 570 0405 000 606 1136 080 606 1139 200 606 1290 125 629 0093 000 629 0181 000 943 5601 235 943 5601 710 9710039008T 971 0040 009 Table 7‐27 Part Number 398 0777 001 411 0126 000 544 1703 000 9010222011GT 9010222021G 9010222041G 9010222051G 9010222081GT Table 7‐28 Part Number 335 0486 000 359
7‐14 Section-7 Parts List November 11, 2013 Table 7‐29 Part Number 746 0533 000 9010221221G 9010222101G 9010222131G 9010222141GT 9010222271G 9010222601G 9010222701GT 9710039011T 9710039018T 9710039020T 9710039021T 9710039022T 9710039033T 9710039040T 9710039156T SBK, ULX TCU PC KIT SPARE BOARDS ‐ 990 0160 004 (E) Description *PANEL PC, PDX‐057T (PRE‐LOADED) PWA, INRUSH LIMITER PWA, 4PA BACKPLANE BOARD PWA, IPA BACKPLANE PWA, CUSTOMER I/O BOARD TESTED PWA, PRE DRIVER SIGNAL INTERCONNECT PWA, CONTACTOR CONT
Maxiva ULX Series November 11, 2013 381 0155 000 383 0277 000 383 0547 000 383 0667 000 383 0706 000 383 0740 000 383 0784 000 383 0786 000 383 0799 000 383 0813 000 383 0814 000 383 0823 000 PNP, EPITAXIAL IC = ‐1ADC IC, LM4040CIM3‐2.
7‐16 Section-7 Parts List November 11, 2013 515 0189 000 515 0192 601 CAP 22UF 1206 X5R 6.3V 20% CAP 1UF 0603 X5R 16V 10% 4 EA 12 EA 515 0193 000 526 0394 000 545 0309 203 545 0331 111 545 0331 125 CAP 100UF 1210 6.3V X5R 20% CAP, 100UF 16V 20% SMT 7343 RES 121 OHM 1% 1/4W 1206 RES 26.7 OHM 1% 1/10W 0603 RES 49.
Maxiva ULX Series November 11, 2013 545 0369 317 RES 4.75K OHM 1% 1/16W 0402 17 EA 545 0369 999 561 0002 007 603 0006 000 604 1163 000 610 0877 000 610 1160 000 610 1401 020 610 1459 000 611 0016 000 611 0160 000 612 1184 000 612 1594 000 612 1631 000 612 2139 001 612 2243 009 612 2302 000 646 2110 000 660 0054 000 746 0343 000 801 0221 321 8010221323G 880 0221 321 RES 0 OHM JUMPER 0402 POSISTOR 0.
7‐18 Section-7 Parts List November 11, 2013 560 0122 022 610 0746 000 646 2110 000 660 0113 000 801 0215 091 9010215092G POSISTOR 4 AMP 30VDC RECT DISC HDR, 20C VERT 2ROW UNSHR BARCODE, SN_ITEM_REV BAT PACK 4.
Maxiva ULX Series November 11, 2013 9710035011G 971 0035 013 971 0035 014 971 0035 016 971 0035 018 971 0035 019 9810274001WI Table 7‐40 ASM‐SUB‐TX/IO INTERFACE MODULE ASM‐SUB‐BLANK PANEL A ASM‐SUB‐BLANK PANEL B ASSY, M2X FRONT PANEL ASSY, M2X PFRU ASM‐SUB‐COVER‐NONVENTED WI, M2X BASIC 1 EA 1 EA 1 EA 1 EA 1 EA 1 EA 0 DWG *PWA, SIGNAL PROCESSOR ‐ 9010215181G (J) Part Number 360 0073 000 360 0073 001 404 1007 000 410 0492 006 445 0055 000 516 0054 000 610 0900 000 610 1110 000 610 1401 040 610 1402 020
7‐20 Section-7 Parts List November 11, 2013 9810274008G ASSY, IPZ6800+, ASI OVER IP (M2X\UAX\VAX) 9810274105G ASSY, SRD6800+, SAT RECEIVER, W/ASI IN 9810274107G ASSY, SRZ6800+, SAT RECEIVER, W/ASI IN 988 2624 002 DP, UEP, ATSC 9950063001WI WI, M2X EXCITER, FORMAT Table 7‐43 Part Number 646 2110 000 861 1135 242 880 0063 001 971 0035 003 9710035020G 981 0274 001 988 2624 004 9950063001WI Table 7‐44 Part Number 646 2110 000 861 1135 362 880 0063 001 9010215281G 971 0035 003 981 0274 001 9810274006G 981027
Maxiva ULX Series November 11, 2013 359 1631 000 359 1632 000 359 1634 000 359 1635 000 629 0202 000 646 1683 000 778‐225‐003 817 2150 037 843 5607 462 943 5607 436 943 5607 437 943 5607 449 943 5607 450 943 5607 463 943 5607 631 971 5607 015 359 1620 000 708 0061 020 971 5607 014 Table 7‐47 Part Number 335 0489 000 358 3185 000 359 1638 000 424 0677 000 Table 7‐48 Part Number 055 0120 227 055 0120 231 055 0120 373 350 0046 000 354 0026 000 358 1316 000 358 3637 000 358 3717 000 606 1232 150 614 0920 000
7‐22 Section-7 Parts List November 11, 2013 Table 7‐49 Part Number 021 7510 002 021 7510 004 335 0487 000 335 0488 000 335 0489 000 336 1254 000 354 0190 000 358 1036 000 358 1316 000 359 1617 000 359 1619 000 359 1620 000 359 1621 000 424 0677 000 606 1232 150 629 0202 000 638 0075 000 708 0061 020 708 0061 072 736 0498 000 736 0499 000 9010227101T SPK, ULX/VLX HI EFFICIENCY PUMP MODULE, HE II ‐ 990 0160 014 (B) Description HOSE, 1/2'' ID, BLUE HOSE, GEN PURP EPDM 1.
a‐1 Maxiva ULX Series November 11, 2013 Appendix-a Cutting & Soldering Transmission Line a a.1 Suggested Cutting And Soldering Procedure The purpose for this procedure is to provide guidelines for field cutting and soldering of RF transmission line used to interconnect the transmitter to the RF system. Try to cut and flange the longest pieces first. Complete one run at a time in order to avoid accumulated errors. (i.e.: Cut, solder, and hang line from antenna port of bandpass filter to patch panel.
a‐2 Appendix-a Cutting & Soldering Transmission Line November 11, 2013 6. Measure the flange‐face to flange‐face dimension after soldering to confirm the proper length and to determine the initial length of the inner conductor. 7. Determine the length of the inner conductor by using the flange‐face to flange‐face dimen‐ sion of the outer conductor and subtracting the dimension of the anchor connector (bullet) shown in Figure a‐3.
Maxiva ULX Series November 11, 2013 a‐3 Cutback for inner conductor. The amount of cutback vary for different transmission line manufacturers. Figure a-3 Measurement for Cutback of Inner Conductor a.3 Cutting The Transmission Line A square smooth cut is required. Several methods, listed below, may be used with the choice depending on tools and labor available. 1. Method 1.
a‐4 Appendix-a Cutting & Soldering Transmission Line November 11, 2013 Figure a-4 Guide For Use With Hand Hack Saw Start Cut Stop Cut On the first pass score the cut. Do not let the blade go below the surface. Correct Depth Turn Line Approximately 45 Degrees Cut Too Deep Finish cut on second pass.
Maxiva ULX Series November 11, 2013 a‐5 Figure a-6 Swing Arm Band Saw Cutting Tips Figure a-7 Use Of Tubing Cutter Results In Crimped Cut (Exaggerated) 888‐2628‐300 WARNING: Disconnect primary power prior to servicing.
a‐6 Appendix-a Cutting & Soldering Transmission Line November 11, 2013 a.4 Soldering Flanges Transmission line flanges that are supplied with the optional transmission line kit are the silver solder type. Although the attachment of this type of flange may require more care and skill than the soft solder type, it has been found that the silver soldered flange provides much greater reliability.
Maxiva ULX Series November 11, 2013 a‐7 Figure a-8 Bevel Cut End and Remove Burs Figure a-9 Torch Aiming Location a.5 Cleaning The Soldered Joint Vigorous scrubbing with a wire brush and steel wool will remove torch black with good results. In addition, cleaning with an acid solution can make this job easier. The procedure is as follows: Warning MURIATIC ACID USED IN THE FOLLOWING PROCEDURE IS HAZARDOUS. USE EYE AND SKIN PROTECTION WHEN HANDLING OR MIXING.
a‐8 Appendix-a Cutting & Soldering Transmission Line November 11, 2013 a.5.1 Alternate Cleaning Method The following is an alternate procedure to clean the soldered transmission line. The following materials are needed. • Water and Hose • Small Paint Brush • Rubber Gloves • Scotch Brite Pad or BBQ Grill Cleaning Pad With Handle • Naval Jelly (or equivalent rust remover). Warning NAVAL JELLY CONTAINS PHOSPHORIC ACID AND CAN BE DANGEROUS IF IT COMES IN CONTACT WITH SKIN OR EYES OR IF IT IS SWALLOWED.
b‐1 Maxiva ULX Series November 11, 2013 Appendix-b Cooling System Help b.1 b Coolant and Water Recommendations The cooling loop uses a 50% mixture by volume of deionized water and industrial grade ethylene or propylene glycol. The recommended glycol products are listed below. Equivalent coolants from another manufacturer may be used as long as its inhibitors are similar.
b‐2 Appendix-b Cooling System Help November 11, 2013 b.2 Plumbing System Installation b.2.1 Materials needed • Mapp gas torch set • Extra Mapp gas tanks • Welders mask or goggles • Tubing cutter for 2.5 inch tubing (a hacksaw may be used instead of the tubing cutter) • Flux (Stay Clean Flux) or equivalent (Harris part number 086 0004 040; one 16 oz bottle provided with plumb‐ ing kit) • Soft silver solder (96.5% tin; 3.5% silver) such as Aladdin #450 (Harris part number 086 0004 038) is needed.
Maxiva ULX Series November 11, 2013 b‐3 one or both, will not allow the solder to flow properly for continuous adherence of the solder to the two surfaces being soldered. After cleaning and fluxing, a continuous and evenly distributed application of heat without overheating will result in an evenly distributed flow of solder between the surfaces being soldered for a plumbed system that does not leak.
b‐4 Appendix-b Cooling System Help November 11, 2013 Repairs for a leak originating at a threaded joint may be initially attempted by tightening the affected joint without draining the system. If this tightening effort does not correct the problem, then the system must be drained, the problem area opened and replumbed as necessary, followed by a system refill and test. b. Probably the single most important maintenance step: Inspect the bottom of the heat exchanger bi‐ monthly.
c‐1 Maxiva ULX Series November 11, 2013 Appendix-c Grounding Considerations, Surge Protection c.1 c Surge and Lightning Protection A lightning storm can cause transients in excess of 2kV to appear on power or field signal lines. The duration of these transients varies from a few hundred nanoseconds to a few microseconds. Power distribution system transient protectors can efficiently protect the transmitter from transients of this magnitude.
c‐2 Appendix-c Grounding Considerations, Surge Protection November 11, 2013 The primary electrostatic shield of the isolation transformer, if used, connects to the AC neutral wire (white) so that in the event of a transformer primary fault, fault current is returned directly to the AC source rather than through a common ground system. The AC neutral is connected to earth ground at the service entry.
Maxiva ULX Series November 11, 2013 c‐3 Each individual piece of equipment must be bonded to its rack or cabinet, or have its case or chassis bonded to the nearest point of the equipotential plane. Racks and cabinets should also be grounded to the equipotential plane with a copper strap. RF transmission line from the antenna must be grounded at the entry point to the building with 2 or 4 inch copper strap. Wire braid or fine‐stranded wire must not be used.
c‐4 Appendix-c Grounding Considerations, Surge Protection November 11, 2013 Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
d‐1 Maxiva ULX Series November 11, 2013 Appendix-d Lightning Protection Recommendation d.1 d Introduction What can be done with a 2 million volt pulse pushing 220,000 amps of current into your transmitting plant? Like the 500 pound gorilla it does what ever it wants to. There is not much that can be done to protect against a major direct lightning strike. This is called a significant impulse lightning stroke.
d‐2 Appendix-d Lightning Protection Recommendation November 11, 2013 All Triggered Events 40 20 Collected Events Number Per Year 30 10 500 1500 1000 Structure Height In Feet 2000 Figure d-2 Lightning Incidents to Tall Structures d.2 Environmental Hazards There are devices and procedures that do offer protection from lessor environmental hazards than lightning. Some of these anomalies are listed and defined: 1. Over voltage/under voltage (brownout).
Maxiva ULX Series November 11, 2013 d‐3 gy to a great extent. This does not totally eliminate the problem because there are currents traveling in the earth, which prefer to travel on the metal conductors, when lightning strikes close to the station. 5. Surge. A rapid increase in voltage on the power lines usually caused by lightning. The dura‐ tion is less than 1/2 cycle and can be very destructive.
d‐4 Appendix-d Lightning Protection Recommendation November 11, 2013 Figure d-4 EM Flux Field 2400 A 2000 Voltage kV B C 1600 1200 800 0 1 2 3 Time in usec 4 5 6 A = 1/2 mile from station B = 1 mile from station C = 2 miles from station. Figure d-5 Sample Surge Voltage as a Function of Distance From Stroke to Line Copyright ©2013, Harris Broadcast WARNING: Disconnect primary power prior to servicing.
Maxiva ULX Series November 11, 2013 d‐5 Figure d-6 Surge Protectors and Ferrite Chokes d.3 What Can Be Done? Installation of the transmitter building, antenna tuning unit if applicable, and antenna should be done so that the risk of destruction due to lightning is minimal and the efficiency of the over all system is maximized. To do this, separate ground systems should be installed for the building and antenna. This forces all of the RF return currents to flow in the transmission line shield.
d‐6 Appendix-d Lightning Protection Recommendation November 11, 2013 Figure d-7 Basic Elements of a Properly Designed Antenna System d.4 AC Service Protection All incoming ac lines should have a choke connected in series to limit the high frequency surges on the lines followed by a surge protector. The surge protector must be connected to the building ground system by short direct connections, see Figure d‐6.
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