ADCP-75-187 • Issue 1 • September 2005 • Section 2: DESCRIPTION Table 2-6. Interim Single-Band Remote Unit Nominal Specifications PARAMETER Physical/Environmental/ Electrical - Remote Unit Dimensions (L×W×D) SPECIFICATION REMARKS 37.3 × 10.2 × 7.5 inches (947 × 259 × 191 mm) Mounting Pole, wall, or strand mounted Requires accessory kit for strand mounting Weight 79.5 lbs. (36.
ADCP-75-187 • Issue 1 • September 2005 • Section 2: DESCRIPTION Blank Page 2-20 © 2005, ADC Telecommunications, Inc.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION SECTION 3: OPERATION Content 1 2 Page BEFORE STARTING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 1.1 Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 1.2 Readiness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 1.2 Readiness Check Before starting the turn-up process, inspect the complete Digivance system to verify that all components of the system are ready to be powered-up. This will ensure that no units of the system will be damaged during turn-up and that all existing systems will continue to function properly. 1.2.1 Host Unit Installation Checks Complete the following checks at the HU prior to starting the turn-up process: 1.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 2.1 Turn-Up Procedure Each Digivance system must be turned-up separately before being networked together with multiple systems through the CAN interface. Use the following procedure to turn-up each Digivance system: 1. Temporarily disconnect the external alarm system or notify the alarm system provider that testing is in progress. 2.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 9. Start up the EMS Version 3.01 software program. The EMS main window will open as shown in Figure 3-1. The EMS software should be installed on a PC-type computer and the PC’s COMM port should be configured to interface with the HU. For information about installing the EMS software and configuring the PC’s COMM port, refer to the Digivance Element Management System Version 3.01 User Manual (ADCP-75-182).
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 11. New Control program software and FPGA program software will be provided separately on a “as needed” basis. If new Control and FPGA software is not provided with the system, proceed to step 12. If a Control and FPGA software upgrade is required, contact the ADC Technical Assistance Center (see Section 5) for help with the download procedure. 12. Click on the HOST Config tab and on the REMOTE Config tab (see Figure 3-2).
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 24. If a separate laptop computer loaded with the EMS software was used to initially configure the system, disconnect the laptop computer from the SERVICE connector. Note: When two or more HU’s are connected together through the CAN interface, only one EMS computer is required to manage the networked Digivance systems. The EMS computer may be connected to the SERVICE port on any one of the HUs in the network. 25.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION ENHANCED BASE TRANSCEIVER STATION 806-824 RECEIVER 896-901 RECEIVER 851-869 TRANSMITTER 935-940 TRANSMITTER EXTERNAL ATTENUATORS REVERSE PATH OUTPUT SIGNAL LEVEL AS SET BY HOST REVERSE PATH ATTENUATORS 0 to 31 dB ATTENUATORS (HOST REV ATT) 0 to 31 dB ATTENUATORS (HOST FWD ATT) HOST UNIT RF, OPTICS, AND CONTROL FORWARD PATH INPUT SIGNAL LEVEL AT HOST UNIT (-20 dBm OPTIMAL COMPOSITE FOR FULL POWER) FORWARD PATH SIGNAL LEVEL AS SET BY H
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 5. Determine the total cable loss that is imposed by the forward path coaxial cable that links the EBTS to the HU and also any insertion loss imposed by splitters or combiners. 6. Subtract the total cable loss and any insertion losses from the total composite power calculated in step 4. 7. Subtract –20 (optimum input signal level) from the value determined in step 6.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION Click on the Edit button to open pop-up screen HOST Site Number HOST Site Name REMOTE Site Number (Entered automatically when the HOST site number is selected) REMOTE Site Name Figure 3-4. HOST and REMOTE Config Displays Figure 3-5. HOST Site Name Pop-Up Screen 3. Click on the HOST Site Number Edit button (see Figure 3-4). The Site Number pop-up screen will open.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 2.4 Enter Host Forward Attenuation The HU internal forward path attenuator setting determines the maximum composite output signal level at the RU antenna port. The appropriate attenuation value for any particular system is based on the number of channels the system is transporting and the signal level of the composite forward path signals input at the host units RF IN ports. By default, the forward path attenuator is set to 31 dB.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION Figure 3-7. Host Fwd Att Pop-Up Screen 4. Determine the appropriate value to enter for the Host forward path attenuator by subtracting the required system output level (per system design plan) from the system gain (77.5 dB for 800/900 MHz SMR) and then adding the composite input signal level. The result (see sample calculation) is the amount of attenuation required.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 7. Calculate the total composite signal power using the following formula: Ptot = Pc + 10Log N Where, Ptot is the total composite power in dBm Pc is the power per carrier in dBm as measured in step 6, and N is the total number of channels. 8. Record the result measured in step 5 or calculated in step 7. 9. Place the AC circuit breaker switch (at the RU power panel) in the open (OFF) position. 10.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION Click Edit button to open the Remote Fwd Att pop-up screen RF output signal level (± 3 dB) Figure 3-8. REMOTE LPA Display Figure 3-9. Remote Fwd Att Pop-Up Screen 6. Verify that the appropriate RF output signal level appears in the RF Output Power field (see Figure 3-8). This is primarily a reference value and should not take the place of external test equipment when determining the power level of the composite RF output signal.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 2.7 Enter Host Reverse Attenuation The level of the RF signal that should be input to the EBTS will vary depending on the type of EBTS, the receive distribution, and the number of channels present. To interface with the EBTS, the reverse path signal level must be adjusted to provide the signal level required at the EBTS input port(s). The HU provides from –1 to +30 dB of gain in the reverse path.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION Figure 3-11. Host Rev Att Pop-Up Screen 6. Enter the attenuation value that will provide the required gain. Refer to Table 3-2 for the attenuation values and the corresponding gain (nominal) values. 7. Click OK to close the pop-up screen and to make the changes take effect. Table 3-2. Reverse Path Attenuation Setting and Nominal Gain Provided ATTENUATION SETTING 2.
ADCP-75-187 • Issue 1 • September 2005 • Section 3: OPERATION 1. Click on the HOST RF tab. The HOST RF display will open within the EMS main window as shown in Figure 3-12. Click Edit button to open the Host Fwd Delay pop-up screen Click Edit button to open the Host Rev Delay pop-up screen Figure 3-12. HOST RF Display 2. Click on the Host Fwd Delay field Edit button (see Figure 3-12). The Host Fwd Delay pop-up screen will open as shown in Figure 3-13. Figure 3-13. Host Fwd Delay Pop-Up Screen 3.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE SECTION 4: MAINTENANCE Content Page 1 SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 2 FAULT DETECTION AND ALARM REPORTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 3 FAULT ISOLATION AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 2 FAULT DETECTION AND ALARM REPORTING The Digivance LRCS on-board embedded software detects various unit and system faults which generate ether a Major or Minor alarm. A Major alarm indicates that the system has failed in a way that directly affects RF transport performance. When a major alarm occurs, all RF functions are disabled and the system is out of service.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-1. Host Unit LED Indicators INDICATOR COLOR DESCRIPTION Green Off Indicates if the HU is powered or un-powered. The DC power source is on. The DC power source is off. POWER STANDBY Indicates if the system is in the standby, normal, test, or program load mode. Green (blinking) The HU is in the standby mode. Yellow (blinking) The HU is in the program load mode. The HU is in the test mode.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 3 FAULT ISOLATION AND TROUBLESHOOTING Alarm information may be accessed using the HU and RU LED indicators, the EMS software GUI, the NOC-NEM interface, or the SNMP manager. When an alarm occurs, use the unit LED indicator(s) and any one of the specified software tools to determine which Digivance system is affected, which unit (HU or RU) reported the alarm, and the fault that generated the alarm. Then refer to either Section 3.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 3.1 Host Unit Troubleshooting Use this section to troubleshoot alarms that originate with the Host Unit. When a Minor alarm occurs, one (or more) of the Host Unit LED’s with turn yellow and the EMS software will indicate a minor fault/alarm. When a Major alarm occurs, one (or more) of the Host Unit LED’s will turn red and the EMS software will indicate a major fault/alarm.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-3. Host Unit Fault/Alarm Isolation Diagram, continued Host Unit Front Panel LED Software Fault/Status Indicator Corrective Action or Reference Green - Normal Remote Unit Yellow - Minor Alarm at Remote Unit - See Table 4-5. Remote Unit Fault/Alarm Isolation Diagram Red - Major Alarm at Remote Unit - See Table 4-5.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-4. Host Unit Fault/Alarm Corrective Action, continued PROBLEM C: The RF input signal level is below the underdrive threshold. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Composite output signal from EBTS is too low. 1. Check EBTS composite output signal level and adjust if too low. 2. Correct EBTS cables if faulty. 2. Faulty coaxial connection between the HU and the EBTS. 3. Check Host Forward Attenuator setting and 3.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-5.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-5.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE Table 4-6. Remote Unit Fault/Alarm Corrective Action, continued PROBLEM D: The forward path VSWR is above threshold. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty antenna or antenna system. 1. Check the antenna system for shorts or opens (including lightning protector). To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 2. Check the antenna cable for faulty connections. 3.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 4 TEST PROCEDURES This section provides procedures for common troubleshooting and maintenance tests. Refer to these procedures as needed when specified in the Fault/Alarm Isolation Diagrams in Section 3. 4.1 Optical Power Test A break in an optical fiber or a fault with the optical connector will interrupt communications between linked components or generate excessive errors.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 7. Connect the input (transmitter) end of the optical fiber to the transmitting HU or RU. 8. If the transmitting unit is the HU, place the On/Off switch in the ON position (press I). If the transmitting unit is the RU, close (turn on) the AC circuit breaker switch. 9. Using the transmitting HU or RU as an optical light source, measure the optical power at the receiver end of the optical fiber.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE 15. If the transmitting unit is the HU, place the On/Off switch in the OFF position (press O). If the transmitting unit is the RU, open (turn off) the AC circuit breaker switch. 16. Disconnect the optical power meter from the receiver end of the optical fiber. 17. Reconnect the optical fibers to the receiving HU or RU. 18. Repeat steps 3 through 17 for each optical fiber that requires testing. 19.
ADCP-75-187 • Issue 1 • September 2005 • Section 4: MAINTENANCE HOST UNIT FWD (PORT 1) REV (PORT 2) 20019-C 15 dB ATTENUATOR 1 METER PATCH CORD Figure 4-4. Host Unit Loopback Test 8. Observe the FWD/REV (PORT 1/PORT 2) LED indicator which will turn either red or green. If the LED turns red, either the FWD (PORT 1) optical transmitter or the REV (PORT 2) receiver is faulty. If the LED turns green, both the FWD (PORT 1) and the REV (PORT 2) optical ports are good. 9.
ADCP-75-187 • Issue 1 • September 2005 • Section 5: GENERAL INFORMATION SECTION 5: GENERAL INFORMATION Content Page 1 WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 2 SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 3 REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-187 • Issue 1 • September 2005 • Section 5: GENERAL INFORMATION 4 REPAIR CHARGES If the defect and the necessary repairs are covered by the warranty, and the applicable warranty period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return the defective Product. ADC will repair or replace the Product at no charge and pay the return shipping charges.
ADCP-75-187 • Issue 1 • September 2005 • Section 5: GENERAL INFORMATION 7 CUSTOMER INFORMATION AND ASSISTANCE PHONE: EUROPE Sales Administration: +32-2-712-65 00 Technical Assistance: +32-2-712-65 42 EUROPEAN TOLL FREE NUMBERS Germany: 0180 2232923 UK: 0800 960236 Spain: 900 983291 France: 0800 914032 Italy: 0800 782374 U.S.A.
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