Instruction Manual VITS100 NTSC VITS Inserter 070-8333-02 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.
Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Service Assurance If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs. Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three years of Repair Protection.
Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii ix VITS Inserter Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accessories and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Check and Installation . . . . . . . . . . . . . . . . . . .
Table of Contents Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal and Replacement Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–7 7–8 7–11 Replaceable Electrical Parts Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Figures Figure 1–1: A setup for the functional check . . . . . . . . . . . . . . . . . . . . Figure 1–2: A typical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 1–5 Figure 2–1: The front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2–2: VITS100 NTSC VITS Inserter rear panel . . . . . . . . . . . . Figure 2–3: VITS100 NTSC VITS Inserter source ID signal . . . . . . .
Table of Contents iv Figure 5–9: Connecting the RF bridge to the spectrum analyzer/tracking generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 5–10: The initial frequency response setup . . . . . . . . . . . . . . . . Figure 5–11: Frequency response display . . . . . . . . . . . . . . . . . . . . . . . Figure 5–12: Measuring frequency response . . . . . . . . . . . . . . . . . . . . 5–18 5–20 5–21 5–22 Figure 6–1: Adjustments and test points . . . . . . . . . . . . . . . . .
Table of Contents List of Tables Table 1–1: Factory VITS, Standard and Option 1M . . . . . . . . . . . . . Table 1–2: Factory VITS, Option 1J . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–3: Factory VITS, Option 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4 1–4 1–4 Table 2–1: Standard Factory-Programmed Signals . . . . . . . . . . . . . . Table 2–2: DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents vi Table 7–1: Mode Selection Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7–2: Test Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7–3: The User Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–5 7–6 7–12 Table 9–1: A1 Component Locator 671–2132–05 & Up . . . . . . . . . . . . Table 9–2: A1A1 Component Locator . . . . . . . . . . . . . . . . . . . . . . . . . .
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Ground the Product.
General Safety Summary WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking.
Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, switch off the instrument power, then disconnect the power cord from the mains power.
Service Safety Summary x VITS100 NTSC VITS Inserter Instruction Manual
Getting Started
Getting Started The Tektronix VITS100 NTSC VITS Inserter is a high quality signal generator designed to insert VITS (Vertical Interval Test Signals) into program video. It automatically switches to bypass mode in the event of power failure or loss of lock to the program video. See VITS Inserter Functions, below, for a brief explanation of what the VITS inserter can do. See Functional Check and Installation, on page 1–3, to begin using your new VITS inserter.
Getting Started Source ID The VITS inserter can also insert a one-line source identification code on any of the available lines in vertical blanking. The Tektronix VM700A Video Measurement Set can then use this code to identify the source of the signal it is measuring. Auto VIRS Another function of the VITS inserter is Auto VIRS. When Auto VIRS is selected, the VITS inserter checks the specified lines and fields of the incoming program video for a VIRS signal.
Getting Started Functional Check and Installation It is good practice to perform a functional check of a new instrument before installing it into your system. Functional Check Perform the following functional check to confirm proper operation of your new VITS inserter and to familiarize yourself with its features. 1. Unpack the instrument. If possible, save all packing materials for later shipping or storage. 2.
Getting Started 7. While watching the waveform monitor display, repeatedly press the VITS inserter BYPASS switch to alternate between bypass and normal operating modes. Confirm that the appearance of the vertical interval (that is, the “gap” between the two visible fields) changes in appearance, indicating the alternating presence and absence of inserted VITS. The change is easiest to see when the test signal generator is outputting a Black Burst signal. 8.
Getting Started Installation You can mount the VITS inserter in a standard equipment rack or custom install it. In custom installations, be sure to provide easy access to the signal-selection DIP switches through the removeable panel in the top of the instrument. Also be sure not to block the cooling holes in the top cover. After performing the functional check, complete installation with the following steps: 1.
Getting Started 1–6 VITS100 NTSC VITS Inserter Instruction Manual
Operating Basics
Operating Basics The VITS100 NTSC VITS Inserter can generate any one of thirteen test signals for insertion on lines 17 through 20 in the vertical interval of the video frame. If power fails or the instrument cannot genlock, the VITS inserter automatically switches to bypass mode. VITS signal selection and line assignments are made with four DIP switches that are accessible through the top of the VITS inserter. See VITS Selection, on page 2–5, for more information.
Operating Basics Rear Panel The VITS100 NTSC VITS Inserter rear panel, shown in Figure 2–2, contains the mains power input, switch, and fuse; the program input and output connectors; DIP switches for source identification code selection; and a remote connector. Figure 2–2: VITS100 NTSC VITS Inserter rear panel Power The power block consists of the connector, fuse, and power switch. It is located on the left third of the panel. Power Connector.
Operating Basics Program Out Monitor Out Remote Connector The PROGRAM OUT connector is the program video output. Output video can have user-selected VITS inserted on selected lines. If the instrument cannot lock to the program input video signal, or if power fails, the program automatically bypasses the VITS inserter processing circuitry; the input signal is then routed through a delay line, with a delay equivalent to the processing delays of the instrument, to PROGRAM OUT.
Operating Basics Passing Program Video In addition to internally generated test signals, the VITS inserter can pass video signals that are already in the vertical interval of the program video. This includes the delete/insert lines, which are lines 17 through 20 in all fields. Auto VIRS When AUTO VIRS is selected, the instrument automatically checks the assigned line and field of the incoming video for a VIRS signal. If VIRS is detected, the line is passed with no processing.
Operating Basics Factory Configuration The VITS100 NTSC VITS Inserter is configured during manufacture to insert the signals listed in Table 2–1. See VITS Selection, below, for instructions on configuring the VITS inserter to insert the signals that best suit your applications and facility.
Operating Basics Screws (2) Cover Figure 2–4: Location of VITS selection switches Switch/Line Assignments Switches S1 and S2 make the selections for fields 1 and 3, and switches S3 and S4 make the selections for fields 2 and 4. Each DIP switch selects the test signals for two of the vertical interval lines, as shown in Figure 2–5.
Operating Basics Switch Settings The switch settings for signal selection are listed in Table 2–2. When a switch segment is thrown to the left (as viewed from the front of the VITS inserter), it is open; when thrown to the right, it is closed. Open positions are denoted in the table as 1, and closed are denoted as 0. Table 2–2: DIP Switch Settings VITS inserter Action DIP Segment Settings* 1 (5) 2 (6) 3 (7) 4 (8) 0 1 1 0 1 0 0 1 7.
Operating Basics Remote Control Remote control in the standard VITS100 NTSC VITS Inserter is limited to ground-closure Bypass control and (+5 V) outputs for remote BYPASS, UNLOCKED, and POWER indicator lights. See Figure 2–6 and Table 2–3 for the rear-panel REMOTE connector pin assignments.
Specifications
Specifications This section contains tables that list the specifications for the VITS100 NTSC VITS Inserter. All specifications are guaranteed unless noted “typical.” The performance limits in this specification are valid with these conditions: H The VITS inserter must have been calibrated/adjusted at an ambient temperature between +20_ C and +30_ C.
Specifications Table 3–1: Program channel characteristics (Cont.) Characteristic Information Phase Matching of Inserted Test Signal to Program Video ±1° (Program Sync and Burst Normal Level) Pulse to Bar Ratio 100%±0.5% (Typically within ±0.25%) Signal to Noise Ratio >70 dB (Unweighted Filter at 5 MHz.
Specifications Table 3–4: FCC Composite characteristics Characteristic Information Timing See Figure 3–5 Modulated 5-step Staircase Luminance Amplitude 80.4 IRE ±0.7 IRE Riser Amplitude 1/5 of 5-step amplitude ±0.5% Rise Time 250 ns ±25 ns Chrominance Phase Same as burst ±0.3° Envelope Risetime 375 ns ±37.5 ns 2T Pulse Pulse-to-Bar Ratio 100% ±0.5% Half Amplitude Duration (HAD) 250 ns ±25 ns Ringing 1.
Specifications Table 3–5: FCC Color Bars characteristics Characteristic Information Timing See Figure 3–4 Luminance Rise Time 250 ns ±25 ns Bar Characteristics: White ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ Yellow Cyan Green Magenta Red Blue Black Luminance Amplitude (mV p-p) 714.3 494.3 400.7 345.7 256.0 202.1 107.
Specifications Table 3–8: NTC7 Combination characteristics Characteristic Information Timing See Figure 3–8 White Reference Bar Amplitude 100 IRE ±0.7 IRE Rise Time 250 ns ±25 ns Multiburst Packets Amplitude 50 IRE ±0.5 IRE p-p Average Level 50 IRE ±0.5 IRE Frequencies 500 kHz, 1.0 MHz, 2.0 MHz, 3.0 MHz, 3.58 MHz, 4.2 MHz Packet Rise Time 500 kHz and 1.
Specifications Table 3–9: NTC7 Composite characteristics Characteristic Information Timing See Figure 3–9 Modulated 5-step Staircase Luminance Amplitude 90.2 IRE ±0.7 IRE Riser Amplitude 1/5 of 5-step amplitude ±0.5% Rise Time 250 ns ±25 ns Chrominance Phase Same as burst ±0.3° Envelope Risetime 400 ns ±40 ns 2T Pulse Pulse-to-Bar Ratio 100% ±0.5% Half Amplitude Duration (HAD) 250 ns ±25 ns Ringing 1.
Specifications Table 3–11: SIN X/X characteristics Characteristic Information Timing See Figure 3–11 Bandwidth 4.75 MHz Pedestal 24 IRE Peak 90 IRE (Peak amplitude from pedestal ) Table 3–12: Vertical Interval Reference Signal characteristics Characteristic Information Timing See Figure 3–12 Chrominance Reference Amplitude 40 IRE Phase Same as burst ±0.
Specifications Table 3–14: Cable Sweep (Option 2) characteristics Characteristic Information Timing See Figure 3–14 Pedestal Amplitude 50 IRE Sweep Amplitude 100 IRE Sweep Start Frequency 0.1 MHz Sweep End Frequency 4.
Specifications Table 3–16: Power Supply characteristics Characteristic Information Output Voltages +5 V ±200 mV from 1A to 3 A (voltage adjustable) –5.2 V ±300 mV from 0.5 A to 1 A ±12 V ±120 mV from 0.05 A to 0.2 A (post regulated from ±14.5 V by linear regulators) Output Ripple +5 V ≤50 mV switching ripple, ≤5 mV line frequency ripple –5.
Specifications Table 3–18: Environmental characteristics Characteristic Information Temperature Non-Operating –40° to +65° C (–40° to +149° F) Operating 0° to +50° C (32° to 122° F) Altitude Non-Operating To 50,000 ft (15,240 m) Operating To 15,000 ft (4,572 m) Vibration (Operating) Fifteen minutes each axis at 0.025 inch, frequency varied from 10-55-10 Hz in 4-minute cycles with the instrument secured to the vibration platform; ten minutes each axis at any resonant point, or at 55 Hz.
Specifications Table 3–19: Certifications and compliances Category Standards or description EC Declaration of Conformity – EMC Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Specifications Table 3–19: Certifications and compliances (Cont.) Category Additional Compliance Standards or description IEC61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use.
Specifications Figure 3–2: 7.
Specifications Figure 3–4: FCC Color Bars Figure 3–5: FCC Composite 3–14 VITS100 NTSC VITS Inserter Instruction Manual
Specifications Figure 3–6: Multiburst Figure 3–7: Multipulse VITS100 NTSC VITS Inserter Instruction Manual 3–15
Specifications Figure 3–8: NTC7 Combination Figure 3–9: NTC7 Composite 3–16 VITS100 NTSC VITS Inserter Instruction Manual
Specifications Figure 3–10: Red Field Figure 3–11: SIN X/X VITS100 NTSC VITS Inserter Instruction Manual 3–17
Specifications Figure 3–12: VIRS Figure 3–13: Cable Multiburst 3–18 VITS100 NTSC VITS Inserter Instruction Manual
Specifications Figure 3–14: Cable Sweep VITS100 NTSC VITS Inserter Instruction Manual 3–19
Specifications 3–20 VITS100 NTSC VITS Inserter Instruction Manual
WARNING The following servicing instructions are for use only by qualified personnel. To avoid injury, do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so. Refer to all Safety Summaries before performing any service.
Theory of Operation
Theory of Operation This section of the manual begins with a functional description of the circuitry. This brief discussion is followed by a more detailed set of circuit descriptions that take you to the individual component level of the schematic diagrams. Functional Description Program In. The program input is buffered and clamped. The clamped program video drives the Sync Stripper that strips off composite sync and generates the backporch timing for the Clamp. Genlock.
Theory of Operation The power inductor is driven by switching the voltage to its primary winding on and off at a rate of approximately 45 kHz. The power inductor is used as an energy storage device. Energy is stored in the primary during the first half of the switching cycle. On the second half of the switching cycle, the stored energy is transferred to the secondaries. Regulation is accomplished through feedback from the +5 V supply to the Pulse Width Modulator that controls the primary voltage.
Theory of Operation samples. The outputs of U4 and U5 are multiplexed by U82 and U83 to increase the data rate from 4 FSC to 8 FSC. The outputs of U82 and U83 are latched by U1 before being converted to ECL levels. U9 and U10 are the level converters for the DAC, U65, which is located on Diagram 7. The four LSBs are latched by U3 and then selected by a multiplexer, U7 before being converted to ECL levels by U11. Test signal data is stored in U4, U5, and U6 in blocks of eight.
Theory of Operation The Input Buffer, U42, also drives the genlock analog-to-digital converter (ADC), U43. The ADC also has AGC and is clamped with “synctip” and “backporch” signals, which provide the timing. The clamped and AGC’d video is then routed through an anti-aliasing filter (L1, C19, C20, and C21), and then reinput to the ADC where it is digitized. The digital output is input to a PAL, U41. where it is inverted and latched.
Theory of Operation Signal and Switching Control The circuitry that controls signal switching appears on three of the schematic diagrams in the Diagrams section of this manual. Key circuitry is located on diagrams 1 (Test Signal Memory), 2 (Test Signal Select), and 5 (Program Input, Sync Stripper, VIRS Detection, & Genlock A/D Input). Diagram 2. Signal selection is accomplished with four dual in-line package (DIP) switches, S1, S2, S3, and S4.
Theory of Operation Diagram 1. U12 and U15 form a state machine to generate the data for shaped pulse edges. When U15 sees a low-to-high transition, it counts up to six and stops. When U15 sees a high-to-low transition it counts back to zero and stops. This count goes to U12, where it is decoded into the data used to produce rising and falling shaped edges out of the DAC, U65 on schematic 6.
Theory of Operation RT1is a thermistor that limits inrush current on power-up. RV1 is metal-oxidevaristor that clips any high voltage spikes on the AC line before they get to the switching circuits. DS4 is part of a relaxation oscillator that blinks when the instrument is powered up. L17 and C96 form a low-pass filter to keep noise, developed by the power supply, from getting onto C110 and out to the mains supply. C85 and C86 also attenuate internal noise.
Theory of Operation T1 +5V Housekeeping winding –5V +15V C110 VIN –15V Q16, Q17 Q16 on +12V –12V Q16 off Current In primary Current In secondaries Voltage across primary VIN 0V +5.6V Voltage across +5 V secondary 0V –V +V Voltage across -5 V secondary –5.
Theory of Operation The Pulse Width Modulator, U78, is a current-mode controller. Using inputs from the primary circuit and the +5 V output, it varies the width of the pulse that controls Q16. This pulse width variation regulates the secondary voltages throughout variations in the input voltage, output load, and temperature. R163 senses the current in the primary winding of T1 and applies it to U78–3 as a voltage. At the start of the cycle a flip-flop within U78 turns Q16 and Q17 on.
Theory of Operation These requirements are met by using a FET, Q17, in the emitter circuit to turn Q16 on and off. The modulated pulse from U78 gates Q17. When Q17 turns on, base current flows in Q16 through R149 and CR22 (which turns on) and current flows in the primary winding of T1, completing the circuit through Q16, Q17, and R163 into the floating ground. CR20 keeps Q16 from going into hard saturation by diverting some of the base current into the collector when it turns completely on.
Performance Verification
Performance Verification This section contains procedures for verifying that the VITS100 NTSC VITS Inserter performs according to the characteristics stated in the Specifications section of this manual. If the VITS inserter fails to meet a performance requirement, consult the Adjustment Procedure section and make only those adjustments that affect the “out of spec” characteristic.
Performance Verification Equipment Required Table 5–1 lists the test equipment recommended for Performance Verification. Alternate equipment must meet the minimum requirements for the listed equipment. Use of inadequate test equipment may result in faulty measurements and invalid results. Table 5–1: Equipment Required Item Requirements Example Variable Autotransformer Variable range of 90 to 120 VAC (220 V operation use 220 VAC autotransformer) General Radio metered auto transformer: W10MT3W.
Performance Verification Table 5–1: Equipment Required (Cont.) Item Requirements Example 75 W Feed-Through Terminator BNC-type, accuracy of 0.2%. Tektronix part number 011-0103-02 BNC Adaptor Female-to-female Tektronix part number 103-0028-00 75 W BNC Cables (five) 42 in coaxial cables, male BNC ends Tektronix part number 012-0159-00 Precision 50 W BNC cables (two) Male BNC ends Tektronix part number 012-0482-00 50 W to 75 W Minimum Loss Attenuator BNC connectors.
Performance Verification 2. Select the NTC7 Composite signal from the television test signal generator. 3. Store the bar and the line time portions of the NTC7 composite signal as a video measurement set reference signal. 4. Store the C–L gain + delay portions of the NTC7 composite signal as the video measurement set reference. 5. Store the diff phase + gain portions of the NTC7 composite signal as the video measurement set reference. 6. Select Waveform on the video measurement set. 7.
Performance Verification NOTE. The settings of S1-S2-S3-S4 dictate the signals, lines, and fields for the VITS insertion program. Because the instrument may contain a required operating program, it is essential that the switches be reset to the original settings when this procedure is completed. 2. Set DIP switch S1, segments 1, 2, 3, and 4 (line 17, field 1) for 0% Black (0110) signal; see Table 5–2. NOTE. Switch settings in Table 5–2 are for standard instruments.
Performance Verification Line Input Range Requirement: Stable VITS inserter operation over an AC input range of 90–250 V H Program Channel to Test Signal Matching Vary the autotransformer between 90 and 125 Vac (210 and 250 Vac for “220 volt” sources) and verify stable instrument operation. Requirements: DC offset + 0 V "10 mV Insertion transients v10 mV DC matching of inserted test signal to program signal "3 mV 1.
Performance Verification IRE Blanking level Figure 5–3: Blanking level at 0 IRE 6. Move the 75ĂW coaxial cable from the VITS inserter PROGRAM OUT to the MONITOR OUT. 7. Repeat steps 3, 4, and 5. 8. Move the 75 W coaxial cable from the VITS inserter MONITOR OUT to PROGRAM OUT. 9. Use the waveform/vector monitor line select to display line 17 for all fields. 10.
Performance Verification VITS Inserter Program Out Program In 75ĂW Terminator 75ĂW Terminator Waveform/ Vector Monitor Linearity Out TSG/SPG Black burst Subcarrier Out Ext Ref EXT CW REF 75ĂW Terminator Figure 5–4: Equipment connections for phase matching 2. Connect a 75ĂW coaxial cable from the TSG/SPG black burst output to the waveform/vector monitor External Ref. Terminate the remaining side of the loop-through input with a 75ĂW end-line terminator. See Figure 5–4. 3.
Performance Verification Phase Match Bypass Path to Program Path Requirement: Phase error + 0°"1° at FSC. 1. Turn off waveform/vector monitor line select. 2. Set the burst vector to the outer circle and 0° on the vectorscope. Use the phase control to null the burst on the waveform CRT. 3. Press the BYPASS switch on the VITS inserter front panel; the BYPASS LED should light and stay lit. 4. Check that the vector moves no more than 1° as seen on the waveform/vector monitor vector display.
Performance Verification 5. Select the NTC7 Composite test signal from the television test signal generator. 6. Select Relative to Ref Bar & Line Time on the video measurement set. 7. Check that the bar amplitude is 100 IRE 1% (1RE). 8. Check that the bar tilt is 0.5%. 9. Move the 75 W coaxial cable from the VITS inserter MONITOR OUT to the PROGRAM OUT. 10. Check that the bar amplitude is 100 IRE 1% (1RE). 11. Check that the bar tilt is 0.5%. 12.
Performance Verification Differential Gain and Phase Requirements: Differential gain v 0.2% Differential phase v 0.2_ 1. Select Relative to Ref Diff Phase + Gain on the video measurement set. 2. Check that the differential gain is v 0.2%. 3. Check that the differential phase is v 0.2_. 4. Move the coaxial cable from the VITS inserter MONITOR OUT to the PROGRAM OUT. 5. Check that the differential gain is v 0.2%. 6. Check that the differential phase is v 0.2_. 7.
Performance Verification 3. Remove the BNC female-to-female adaptor and connect the coaxial cable from the video measurement set CH A to the VITS inserter PROGRAM OUT. See Figure 5–7. Video measurement set Test Signal Television test signal generator 75ĂW Terminator VITS Inserter Program In Program Out Figure 5–7: Using the video measurement set to compare signals 4. Connect the 75 W coaxial cable from the television test signal generator output to the VITS inserter PROGRAM IN. See Figure 5–7. 5.
Performance Verification SCH Phase Requirement: SCH phase + 0_"5_. 1. Select the video measurement set SCH Phase measurement. 2. Check that the SCH phase is 0_"5_. 3. Select line 18, any field, on the video measurement set. 4. Check that the SCH phase is 0_"5_. Signal-to-Noise Ratio Requirement: Signal-to-noise ratio >70 dB. 1. Select black burst from the television test signal generator. 2. Check the black burst noise spectrum on the video measurement set for a noise level number greater than 70 dB. 3.
Performance Verification Video measurement set 75ĂW Terminator Noise generator Program In VITS Inserter Program Out Test Signal Television test signal generator Figure 5–8: Measuring hum rejection 6. Select Waveform on the video measurement set. 7. Check that hum is present on the porch before and after sync. 8. Check that the porch before burst drifts up and down at hum rate. 9. Check that the back porch following burst drifts less than 0.32 IRE at the hum rate. 10.
Performance Verification Chrominance Risetime Requirement: Chrominance risetime + 300 ns "35 ns 1. Turn on the waveform/vector monitor vertical magnifier. 2. Position the signal blanking level to the graticule 0 IRE line. 3. Use the waveform/vector monitor vertical variable gain to place the top of color burst at the 100 IRE line. 4. Measure the risetime of the leading edge of burst between the 10 and 90% points (10 IRE to 90 IRE). 5. Check that the risetime is between 265 ns and 335 ns.
Performance Verification 8. Set the VITS inserter VITS Selection DIP switches S2 and S4 for the red field signal; segments 1, 3, and 4 are open and segment 2 is closed (1011). 9. Set the waveform/vector monitor for Ext Ref + CW. 10. Select DIFF PHASE. 11. Set the red vector to the outer circle and 0_ on the waveform/vector monitor vectorscope. Set the red bar amplitude to null on the waveform monitor. 12. Select the TSG/SPG Linearity AC Bounce. 13. Check that the red bar phase shifts ≤ 1_ (10 IRE). 14.
Performance Verification 30. Change the coaxial cable from the TSG/SPG color bar output to the black burst output. 31. Measure burst amplitude. It should measure about 40 IRE. 32. Use the TSG/SPG variable burst control to reduce burst amplitude to 28 IRE (–3 dB). 33. Set the red vector to the outer circle and 0_ on the waveform/vector monitor vectorscope. Set the red bar to null on the waveform monitor. 34.
Performance Verification Return Loss and Input/Output Impedance Requirements: Return loss 36 dB to 5 MHz. Spurious signals 55 dB down NOTE. Successful completion of the Return Loss checks guarantees that the input and output impedances are within specification. 1. Connect a 50 W coaxial cable from the spectrum analyzer RF In to the RF Out on the RF Bridge. See Figure 5–9.
Performance Verification 10. Adjust the spectrum analyzer external attenuation amplitude by the amount noted in step 9. 11. Connect the precision high-frequency terminator to the Device Under Test connector on the RF Bridge. 12. Check that the frequency response from 0 MHz to 5 MHz is 40 dBm. 13. Return the spectrum analyzer frequency marker to 5 MHz, if necessary. 14. Remove the precision high-frequency terminator from the RF Bridge. 15.
Performance Verification 27. Connect a 50 W-to-75 W minimum loss attenuator to the spectrum analyzer RF Input. 28. Connect a 75 W coaxial cable from the 50 W-to-75 W minimum loss attenuator to the VITS inserter PROGRAM OUT. 29. Connect a 75 W coaxial cable from the television test signal generator output to the VITS inserter PROGRAM IN. 30. Select television test signal generator Red Field. 31. Select maximum hold on the spectrum analyzer. 32.
Performance Verification 2. Set the TSG/SPG Multiburst output as shown in Table 5–4. Table 5–4: Multiburst Controls Control Setting Frequency Range High Markers On Composite On Amplitude Full Sweep On 3. Connect 75 W coax from detector head output to peak-to-peak detector + input. 4. Enable the peak-to-peak detector + input. 5. Set + input level to light the green LED (full clockwise). 6. Connect 75 W cable from the peak-to-peak detector output to the test oscilloscope input. 7.
Performance Verification 9. Connect the coaxial cable from the TSG/SPG multiburst output to the VITS inserter PROGRAM IN. See Figure 5–12. Peak-to-peak detector Test oscilloscope TSG/SPG INPUT OUTPUT Multiburst Out Program Out VITS Inserter Peak-to-peak detector head Program In Figure 5–12: Measuring frequency response 10. Connect the coaxial cable from the peak-to-peak detector head input to the VITS inserter PROGRAM OUT. 11. Check that the sweep envelope matches the previous waveform 4.
Performance Verification 3. Set the waveform/vector monitor line select to line 19, all fields. 4. Check for VIRS. If there is a signal other than VIRS, you will need to either reprogram the TSG/SPG VITS signals or find a VIRS signal on another line. VIRS is required on both fields. 5. Set VITS selection switch S2, segments 1 through 4, to 0011 (segments 1 and 2 closed, 3 and 4 open). 6. Confirm that S4 segments 1, 2, 3, and 4 are all open (1111). 7. Turn off the TSG/SPG power switch. 8.
Performance Verification 5. Check that the VIRS signal disappears and the VITS inserter front-panel BYPASS light comes on. 6. Remove the grounding wire. 7. Check that the VIRS signal reappears and the VITS inserter front-panel BYPASS light goes out.
Adjustment Procedure
Adjustment Procedures If VITS100 NTSC VITS Inserter performance is not within tolerance for a particular characteristic, determine the cause, repair if necessary, and then use the appropriate adjustment procedure to return the instrument operation to performance specification. After any adjustment, verify performance by repeating the applicable part of the Performance Verification procedure.
Adjustment Procedures Table 6–1: Recommended Test Equipment Item Minimum Requirements Example Variable Autotransformer Variable range of 90 to 120 VAC (220 VAC operation use 220 Vac autotransformer) General Radio metered auto transformer: W10MT3W.
Adjustment Procedures Preliminary Setup With the exception of the video signal connection, this step is the starting point for any adjustment. H Disconnect power and remove the cabinet. See the Maintenance section of this manual for instructions. H Connect the VITS inserter AC power cord to the variable autotransformer. Turn the power on and set the autotransformer to 110 V. H Connect a 75 W coaxial cable from the television test signal generator output to the VITS inserter PROGRAM IN.
Adjustment Procedures R122 TS GAIN R33 PROGRAM GAIN R30 DC ADJ C165 R210 SIN X/X R127 DC ADJ TP8 GND TP3 T2 R40 HORIZ OSC L14 TP10 GND J2 R171 CURRENT LIMIT U44 Pin 18 J19 J17 L1 L13 J18 L12 R170 +5 VOLTS ADJUST J3 J32 J33 TP2 +5V TP6 +12V TP5 -12V TP4 J20 GND J22 J9 TP11 CLK J4 TP1 -5V S8 J56 J57 C19 J12 J13 J54 J55 S1 S2 S3 TP7 GND S7 S4 TP9 GND J6 J5 J28 Figure 6–1: Adjustments and test points 6–4 VITS100 NTSC VITS Inserter Instruction Manual
Adjustment Procedures Power Supply Adjustment Use this step to adjust the +5 V Adjust, R170, which serves as the reference for all other power supplies in the VITS inserter. NOTE. This adjustment affects all adjustments in the VITS inserter. Therefore, if the +5 V supply is within tolerance, do not reset R170 unless you are prepared to perform the complete Adjustment Procedure. 1. Connect a multimeter to TP2 (test point 2) and TP7 (ground) on the circuit board.
Adjustment Procedures Waveform/Vector Monitor 75 W Terminator VITS Inserter CH A input Program In Program Out Television Test Signal Generator Test Signal Figure 6–2: A setup for genlock adjustments 6. Connect a 75 W coaxial cable from the television test signal generator output to the VITS inserter PROGRAM IN. 7. Adjust R30, Program Blanking DC Level Adjust, for blanking at 0 IRE on the waveform/vector monitor waveform graticule. 8.
Adjustment Procedures S1 S2 Line 19 Line 20 Line 17 Program color fields 2 and 4 Line 18 Line 19 Line 20 Line 18 Line 17 Program color fields 1 and 3 S3 S4 Figure 6–3: VITS selection DIP switches 12. Change the coaxial cable from the VITS inserter MONITOR OUT to the PROGRAM OUT. 13. Set the waveform/vector monitor line selector for line 17 all fields. 14. Set the waveform/vector monitor waveform gain to X5. 15.
Adjustment Procedures Waveform/Vector Monitor BNC Adaptor 75 W Terminator CH A input Test Signal Television Test Signal Generator Figure 6–4: Equipment connections for gain adjustments 2. Select the NTC7 Composite signal from the generator. 3. Set the waveform/vector monitor waveform gain to X5. 4. Use WFM + CAL on the waveform/vector monitor to check the amplitude of the bar portion of the signal. Note the amplitude. 5.
Adjustment Procedures 7. Set VITS selection DIP S1, segments 1 through 4, to 0001 (segments 1, 2, and 3 closed and segment 4 open). See Figure 6–3 for the location of S1. 8. Set the waveform/vector monitor for line select and select line 17, all fields. 9. Set the waveform/vector monitor waveform gain to X5. 10. Adjust Test Signal Gain, R122, for a bar amplitude of 714 mV. Frequency Response Adjustments Adjust frequency response characteristics with the following steps. 1.
Adjustment Procedures Peak-to-peak detector Test oscilloscope TSG/SPG INTPUT OUTPUT Multiburst Out BNC Adaptor Peak-to-peak detector head Figure 6–6: Peak-to-peak detector connections 8. Set the TSG/SPG Multiburst output as shown in Table 6–3. Table 6–3: TSG/SPG Multiburst Settings Control Setting Frequency Range High Markers On Composite On Amplitude Full Sweep On 9. Connect a 75 W coaxial cable from the detector head output to the peak-topeak detector + input. 10.
Adjustment Procedures 100 90 10 0% Figure 6–7: Display for adjusting flatness 14. Remove the female to-female BNC adapter. 15. Connect the 75 W coaxial cable from the TSG/SPG multiburst output to the VITS inserter PROGRAM IN as shown in Figure 6–8. Peak-to-peak detector Test oscilloscope TSG/SPG INPUT OUTPUT Multiburst Out Program Out VITS Inserter Peak-to-peak detector head Program In Figure 6–8: Setting flatness 16.
Adjustment Procedures 17. Adjust R210 and C165 for a display on the Test Oscilloscope that matches the sweep envelope to the previous waveform ± 4.3 mV from 2 MHz to 6 MHz (second marker to fourth marker) and ± 12.9 mV from 6 MHz to 10 MHz (fourth marker to sixth marker). See Figure 6–7. 18. Move the 75 W coaxial cable that connects to the Peak-to-Peak Detector Head Input from VITS inserter PROGRAM OUT to MONITOR OUT. 19. Check that the sweep envelope matches that observed in step 17, ± 4.
Maintenance
Maintenance This section discusses the following topics related to maintaining and servicing the VITS100 NTSC VITS Inserter: H Service Strategy (below) H Tektronix Service Offerings (below) H Preparation (page 7–2) H Static Sensitive Components (page 7–2) H Circuit Board Jumpers (page 7–4) H Cleaning and Inspection (page 7–7) H Removal and Replacement Instructions (page 7–8) H Diagnostics (page 7–11) Service Strategy This manual contains all information needed for periodic maintenance of the
Maintenance warranty service at most Tektronix service locations. Do not service the VITS100 NTSC VITS Inserter yourself during the warranty period; rather, contact your nearest Tektronix representative, field office, or service center for information and instructions. Repair Service Tektronix offers single per-incident and annual maintenance agreements that provide Depot Service repair of this instrument.
Maintenance 3. Discharge the static voltage from your body by wearing a wrist grounding strap when handling static-sensitive components. Always service assemblies that contain static-sensitive components at static-free work stations. 4. Remove any device capable of generating or holding a static charge from the work station surface. 5. Whenever possible keep the component leads shorted together. 6. Pick up components by the body, never by the leads. 7. Do not slide components over any surface. 8.
Maintenance Circuit Board Jumpers There are 3 plug jumpers for mode selection and 14 test jumpers for use during repair or troubleshooting on the VITS100 NTSC VITS Inserter circuit board. See Figure 7–1 for plug jumper locations and Tables 7–1 and 7–2 for their functions. In all cases, pin 1 is indicated by the ▼ symbol imprinted on the circuit board.
Maintenance Mode Selection Jumpers All installation procedures that do not require removing the protective cover of the VITS inserter are discussed in the Getting Started section of this manual. The VITS100 NTSC VITS Inserter does have some additional flexibility, however, that is provided with the internal plug jumpers.
Maintenance Table 7–2: Test Jumpers Factory Setting Function Jumper # Description Genlock Processor Reset J5 Pins 1–2: Reset controlled by hardware watchdog. 1–2 Pins 2–3: Holds processor in reset mode. No Plug: No hardware resets. Hardware Watchdog Reset J6 Pins 1–2: No Reset. 1–2 Pins 2–3: Hold in Reset mode. VCO Control J12 Pins 1–2: VCO Control loop closed. 1–2 Pins 2–3: VCO Control voltage set to ground, to set VCO center frequency.
Maintenance Table 7–2: Test Jumpers (Cont.) Function Jumper # Description Factory Setting V Sync J56 Pins 1–2: Used by VITS 200. 2–3 Pins 2–3: VITS 100. Blanking J57 Pins 1–2: Used by VITS 200. 2–3 Pins 2–3: VITS 100. Cleaning and Inspection Preventive maintenance consists of cleaning and visual inspection. The schedule depends on the severity of the operating environment.
Maintenance Removal and Replacement Instructions Use the following procedures to remove and replace the top cover, front panel, inserter circuit board assembly, and oscillator oven. Top Cover This procedure requires a #1 phillips screwdriver. WARNING. To avoid possible electrical shock, disconnect the power cord before removing the top cover. Removal. Use the following procedure to remove the top cover: 1. Remove the four screws from each side of the instrument. 2.
Maintenance 3. Install the instrument top cover. Inserter Circuit Board This procedure requires a #1 phillips screwdriver and a 9/16 inch box end wrench. Removal. Use the following procedure to remove the inserter circuit board assembly; see Figure 7–2 for the location of the various components and fasteners. 1. Remove the instrument top cover. 2. Remove the front panel. 3. Remove the hex nuts on the three BNC connectors that extend through the rear panel. 4.
Maintenance Line filter screws (2) BNC Hex nuts (3) Mounting screw Mounting screw Power supply shield Mounting screw Mounting screw J27 Mounting screw Mounting screw Mounting screw Figure 7–2: Mounting hardware for the inserter circuit board Oscillator Circuit Board Removal/Replacement This procedure requires a #2 POZIDRIV® screwdriver, a #4 hex nut driver, and a #1 POZIDRIV® screwdriver. Removal. Use the following procedure to remove the oscillator circuit board. 1.
Maintenance 3. Remove the screw and hex nut that attach the power transistor to the outside of the metal oven. 4. Remove the oven from the Inserter board by carefully pulling the oven off the seven square pins that attach it to the Inserter board. 5. Remove the screw attaching the metal cover to the oven. 6. Remove the screw that holds the oscillator circuit board to the oven and then pull the oscillator out of the oven. Replacement.
Maintenance Figure 7–3: Diagnostics switch, S8 To run a user diagnostic (including those run at power up), set S8 to the position for the desired diagnostic and then cycle the power off and on. The processor then runs through the power up process, polls the diagnostic port, and runs the selected diagnostic. Table 7–3: The User Diagnostics 7–12 Diagnostic Switch (S8) Setting Test Description 0 None Normal setting, no diagnostics.
Maintenance Table 7–3: The User Diagnostics (Cont.) Diagnostic Switch (S8) Setting Test Description 4 CTC Test Sets up the Counter Timer Chip (CTC, A1U30), and checks to see that the timers can generate interrupts. Each of the four CTC sections should interrupt after the 4096 processor clock cycles. If any CTC section does not interrupt within the allocated time, the test fails. This test runs once during power-up diagnostics.
Maintenance 7–14 VITS100 NTSC VITS Inserter Instruction Manual
Replaceable Electrical Parts
Replaceable Electrical Parts This section contains a list of the electrical components for the VITS100 NTSC VITS Inserter. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements.
Replaceable Electrical Parts Parts List Column Descriptions Column Column Name Description 1 Component Number The component number appears on diagrams and circuit board illustrations, located in the diagrams section. Assembly numbers are clearly marked on each diagram and circuit board illustration in the Diagrams section, and on the mechanical exploded views in the Replaceable Mechanical Parts list section.
Replaceable Electrical Parts Manufacturers Cross Index, Electrical Parts Mfr.
Replaceable Electrical Parts Manufacturers Cross Index, Electrical Parts (Cont.) Mfr. Code Manufacturer Address City, State, Zip Code 18796 MURATA ELECTRONICS NORTH AMERICA INC.
Replaceable Electrical Parts Manufacturers Cross Index, Electrical Parts (Cont.) Mfr.
Replaceable Electrical Parts Manufacturers Cross Index, Electrical Parts (Cont.) Mfr.
Replaceable Electrical Parts Replaceable Electrical Parts List Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number A1CR14 152–0884–00 Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number A1J9 131–0608–00 A1J10 131–3378–00 A1J11 131–0787–00 A1J12 131–0608–00 A1J13 131–0608–00 A1J14 131–3378–00 A1J15 131–3378–00 A1J17 131–0608–00 A1J18 131–0608–00 A1J19 131–0608–00 A1J20 131–0608–00 A1J21 131–0608–00 A1J22 131–0608–00 A1J26 131–0608–00 A1J27 131–0608–00 A1J28 131–0608–00 A1J32 131–0608–00 A1J33 131–0608–00 A1J50 131–0608–00 Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number A1R53 A1R54 A1R55 A1R56 A1R57 A1R58 A1R59 A1R60 A1R61 A1R62 A1R63 A1R64 A1R65 A1R66 A1R67 A1R68 A1R69 A1R70 A1R71 A1R72 A1R73 A1R74 A1R76 A1R77 A1R78 A1R79 A1R80 A1R81 A1R82 A1R83 A1R86 A1R87 A1R88 A1R89 A1R90 A1R91 A1R92 A1R98 A1R99 A1R100 A1R101 A1R102 A1R103 A1R104 A1R105 A1R106 Serial No. Effective Serial No. Discont’d Name & Description Mfr.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number A1R108 Name & Description Mfr. Code 322–3085–07 RES,FXD:METAL FILM;75 OHM,0.1%,0.2W,TC=25 PPM 91637 A1R109 A1R110 A1R111 A1R112 322–3289–00 322–3201–00 322–3201–00 322–3085–07 RES,FXD:METAL FILM;10K OHM,1%,0.2W,TC=100 PPM RES,FXD:METAL FILM;1.21K OHM,1%,0.2W,TC=100 RES,FXD:METAL FILM;1.21K OHM,1%,0.2W,TC=100 RES,FXD:METAL FILM;75 OHM,0.1%,0.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number A1U29 Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective Serial No.
Replaceable Electrical Parts Replaceable Electrical Parts List (Cont.) Component Number Tektronix Part Number Serial No. Effective 136–0925–00 B010230 Serial No.
Diagrams
A1 VITS Inserter Board (671-2132-05 & Up) Figure 9–1: A1 VITS Inserter Board (671–2132–05 & Up) # " !$ VITS100 NTSC VITS Inserter Instruction Manual 9–1
Table 9–1: A1 Component Locator 671–2132–05 & Up CIRCUIT NUMBER C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C33 C34 C36 C37 C38 C39 C40 C41 C42 C43 C46 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 C78 C79 C83 9–2 SCHEM NUMBER 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 9 9 9 9 9 9 9 9 9 9 9 9 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 5 SCHEM LOCATION D5 E4 A1 C2 F2 E2 E2
Table 9–1: A1 Component Locator (continued) CIRCUIT NUMBER R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R76 R77 R78 R79 R80 R81 R82 R83 R86 R87 R88 R89 R90 R91 R92 R98 R99 SCHEM NUMBER 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 9 9 9 9 9 9 9 9 9 9 9 9 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 SCHEM LOCATION B2 B1 B1 C1 C1 C1 C4 C4 D1 D2 D2 D2 D2 E2 F2 F2 F1 G2 F3
# " !$ Figure 9–2: A1A1 Oven Board Table 9–2: A1A1 Component Locator 9–4 VITS100 NTSC VITS Inserter Instruction Manual
U27-17 BLKCLK 3 U28 H[0..9] H[0..
9–6 VITS100 NTSC VITS Inserter Instruction Manual
1L[0..3] 2L[0..3] 3L[0..3] TEST SIGNAL SELECT +5V 1 R6 10k 4L[0..3] 1 2 3 4 5 6 7 8 9 0 S1 FPTS[0..7] 6L[0..3] 1 16 1L0 2 15 1L1 3 14 1L2 4 13 1L3 5 12 2L0 6 11 2L1 7 10 2L2 8 9 2L3 1 U18 74LS251 7L[0..3] 8L[0..3] 3 FPTS[0..7] U16 5L[0..
9–8 VITS100 NTSC VITS Inserter Instruction Manual
H[0..9] 2 11 23 14 (FRAME) U29-11 1 4 U87-19 DVDRIVE U17-18 DVSYNC H0 H1 H2 H3 H4 H5 H6 H7 U13 1 I1 I2 I3 I4 3 4 5 6 7 8 9 10 1 AIO0 AIO1 AIO2 AIO3 AIO4 AIO5 AIO6 AIO7 BIO0 BIO1 BIO2 BIO3 BIO4 BIO5 BIO6 BIO7 ACLK BCLK CLAMP (SYNCT) 22 21 20 19 18 17 16 15 CLAMP U67-7 U27 7C235 H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 H8 H9 13 8 7 6 5 4 3 2 1 23 22 U54-4 U38-6 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 20 18 21 19 +5V CLKB CLKB LOCKED H[0..
9–10 VITS100 NTSC VITS Inserter Instruction Manual
J6 HARDWARE WATCHDOG RESET 1 - 2 NO RESET 2 - 3 HOLD IN RESET MODE P6 J6 1 2 +5V 1 R178 2.7k 1 2 3 4 5 6 7 8 9 0 3 P8 U36 74ALS244 S8 1 2 4 8 5 0 1 2 3 4 5 6 7 8 9 A B C D E 1 P10 2 P11 4 P12 8 P13 F R177 2.
9–12 VITS100 NTSC VITS Inserter Instruction Manual
L19 9uH R33 100 R35 392 R34 301.0 R32 301.0 PROGRAM GAIN ADJUST C120 240pF R36 2.00k U44 TDA2595 U42 EL2090 C3 10uF J10 PROGRAM IN 1 R214 499 3 5 R18 15.0k PROGIN K2-4 6 7 +10V 7 VIDIN- 13 S/H+ S/H OUT 11 HCNTL CHOLD V+ VGND 9 14 12 VIDEO R100 +10V -10V H OSC 10 50% POINT 4 +12V C13 0.1uF R507 71.5k Q2 12 13 COIN DET R40 50.0k R508 20.0k 3 2 R43 100.0K C7 .01uF PROGSYNC U70-3 R48 2.00k R50 2.05k R45 75.0k R42 11.5k U57A 74F00 1 +12V R41 118.0k VR2 6.
9–14 VITS100 NTSC VITS Inserter Instruction Manual
4 R217 162/260 2 C18 0.1uF CR14 P33 1 2 3 4 5 C17 0.1uF R4 20k J11 1 2 3 4 5 R68 511 +10V 5 R70 100.0k 5 R72 2.43k R1 47.5 CLOCK FREQ C19 0.8-10pF C15 12pF Y1 28.63636MHz R5 20k 2 1 8 1 R191 511 -5V C41 0.1uF R224 511 1 1 R190 511 6 9 4 R206 261 3 Q E1 CC 2 3 1 16 8 VCC VCC VEE R U54 10125 2 Q D R225 511 -5V -5V -5V 6 7 R226 511 10 11 -5V 14 15 -5V 9 16 8 -5V R76 3.92K AI AI Q0 BI BI Q1 CI CI Q2 DI DI Q3 VCC GND VEE VBB C42 1000pF 2 R73 6.
9–16 VITS100 NTSC VITS Inserter Instruction Manual
FULL FIELD TEST SIGNAL R103 75.0 C119 240pF L18 9uH J50 1 2 C165 5.5-30 L20 1.51uH R506 100 R124 536 R210 100 C183 33pF R123 110 ETSD[0..11] ETSD[0..11] U65 155-0316-01 6 U63A-3 CLK8FSC U63A-2 (CLK8FSC) ETSD0 ETSD1 ETSD2 ETSD3 ETSD4 ETSD5 ETSD6 ETSD7 ETSD8 ETSD9 ETSD10 ETSD11 C182 22pF +2.5V +12V R230 1.50k U84 5534 1 8 7 3 R229 1.0k R101 2.00k 6 2 C181 0.1uF R227 10.0 4 5 R102 3.01k -5V C179 0.1uF -12V -5V C177 0.1uF C178 0.
9–18 VITS100 NTSC VITS Inserter Instruction Manual
FLOATING COMMON F REAR PANEL S10A LF1 F1 110V OR 220V 1 2 RT1 5 C R143 22M CR12 RV1 330V R144 1M 3 L17 150UH C84 0.15uF 4 S10B R145 10M C85 .01uF R157 270k C110 150UF C88 220pF C C86 .01uF U72 7812 DS4 C87 0.1uF J21 C500 47uF F R501 20.0k 14.1V F 2 C115 1uF R502 30.1K 7 R165 10.0k 1 +15V V CVREF C R173 3.01k 6 8 2 U76A LM393 1 3 3 1 13 J19 C501 .47UF 1 R149 50 F CR20 CR22 CR21 5 6 7 F R503 10.
9–20 VITS100 NTSC VITS Inserter Instruction Manual
+12V OUTPUT 150 MA J20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 P20 P34 -12V OUTPUT P35 150 MA P36 +5V OUTPUT P37 4AMPS -5.2V OUTPUT P38 1.5 AMPS U52 7805 +12V +12VP +12V -12VP -12V +5VP +12V +5V +5R C33 0.1uF -12V C37 0.1uF C174 0.1uF C36 100uF C38 0.1uF TP6 -5VP +12VP -5V +12VP TP5 U53 7905 -12VP C34 0.1uF -12VP -12V -5R TP2 +5VP L2 1.1uH +5VP TP1 -5VP -5VP R66 4.7 -5V VEE +5V VCC +2.5V U51 MC1403 R56 2.49k C26 0.1uF Q6 R62 499 2 U50A 358 8 1 3 C24 0.
9–22 VITS100 NTSC VITS Inserter Instruction Manual
A1 VITS Inserter Board (671-2132-00 through -04) Figure 9–3: A1 VITS Inserter Board (671-2132-00 –04) # " !$ VITS100 NTSC VITS Inserter Instruction Manual 9–23
Table 9–3: A1 Component Locator 671–2132–00 through -04 9–24 VITS100 NTSC VITS Inserter Instruction Manual
VITS100 NTSC VITS Inserter Instruction Manual 9–25
9–26 VITS100 NTSC VITS Inserter Instruction Manual
VITS100 NTSC VITS Inserter Instruction Manual 9–27
9–28 VITS100 NTSC VITS Inserter Instruction Manual
Replaceable Mechanical Parts
Replaceable Mechanical Parts This section contains a list of the replaceable mechanical components for the VITS100 NTSC VITS Inserter. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements.
Replaceable Mechanical Parts Parts List Column Descriptions Column Column Name Description 1 Figure & Index Number Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow. 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix. 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective. Column four indicates the serial number at which the part was discontinued.
Replaceable Mechanical Parts Manufacturers Cross Index, Mechanical Parts Mfr. Code Manufacturer Address City, State, Zip Code 01536 TEXTRON INC 1818 CHRISTINA ST ROCKFORD, IL 61108 0J9P4 DELTA ENGINEERING & MFG. CO. 19500 SW TETON TUALATIN, OR 97062 0JR05 TRIQUEST PRECISION PLASTICS 3000 LEWIS & CLARK HWY PO BOX 66008 VANCOUVER, WA 98666–6008 0KB01 STAUFFER SUPPLY CO 810 SE SHERMAN PORTLAND, OR 97214–4657 13764 MICRO PLASTICS INC.
Replaceable Mechanical Parts Replaceable Mechanical Parts List Fig. & Index Number Tektronix Part Number Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number 1–1 211–0119–00 15 SCREW,MACH:4–40 X 0.25,FLH,100 DEG,STL BK OXD POZ 93907 ORDER BY DESCR –2 200–3994–00 1 DOOR:ALUMINUM 0J9P4 200–3994–00 –3 200–3968–00 1 COVER,TOP:ALUMINUM 0J9P4 200–3968–00 –4 134–0209–00 1 BUTTON,PLUG:0.344 OD,SNAP–IN 0.
Replaceable Mechanical Parts Replaceable Mechanical Parts List (Cont.) Fig. & Index Number Tektronix Part Number Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number STANDARD ACCESSORIES 161–0216–00 1 CABLE ASSY,PWR:3,18 AWG,2.
Replaceable Mechanical Parts 3 1 2 1 4 5 6 28 7 8 27 9 10 26 25 24 14 11 12 13 14 14 15 16 17 18 23 19 20 22 14 21 14 A1 1 Figure 10–1: Exploded view 10–6 VITS100 NTSC VITS Inserter Instruction Manual
Appendix
Appendix A: Options This Appendix describes the available VITS100 NTSC VITS Inserter options. Operation of the instrument is relatively straightforward; the following options expand its utility to situations other than typical broadcast applications: H Option 1J has three signals that differ slightly from those in the standard signal set. These signals are FCC Color Bars without setup, Multipulse without setup, and Red Field with altered luminance and chrominance amplitudes.
Appendix A: Options Option 1J The VITS100 NTSC VITS Inserter Option 1J contains the following three signals that are modifications of those in the standard VITS inserter: Signal Characteristics H Red Field, with modified luminance and chrominance amplitudes H FCC Color Bars without setup H Multipulse without setup See Figures A–1 through A–3 and Table A–1 for descriptions of these signals. 100 70.2 22.5 0 –25.2 –40 0 4.7 9.8 61.8 63.
Appendix A: Options 100 0 –40 0 4.7 9.2 15.8 22.4 29.0 35.6 42.2 48.8 55.5 63.56ms Figure A–2: Option 1J FCC Color Bar signal 100 80 0 –40 0 4.7 9.8 15.7 19.3 25.8 36.1 44.4 51.5 57.4 63.56ms Figure A–3: Option 1J Multipulse signal Factory Configuration The factory-programmed selection of VITS signals is also unique in Option 1J; see Table A–2.
Appendix A: Options Table A–2: Option 1J Factory Programmed VITS Insertions Line Field Signal 17 1 FCC Composite signal 17 2 Multiburst 18 1 and 2 Pass* 19 1 Color Bars (No Setup) 19 2 Pass* 20 1 Sin X/X 20 2 Red Field (Luminance and Chrominance altered) * Passed lines are not deleted or inserted by the VITS 100 NTSC VITS Inserter Option 1M The VITS100 NTSC VITS Inserter with Option 1M is designed to genlock to a PAL-M color television signal.
Appendix A: Options 5 REMOTE 1 Short pins 5 and 9 together to insert NTSC Sync and Burst. Short pins 1 and 6 together to lock VITS 100 into BYPASS mode.
Appendix A: Options Option 2 VITS100 NTSC VITS Inserter Option 2 generates Cable Sweep and Cable Multiburst signals to accommodate cable system measurements. These signals replace the VIRS and Auto VIRS selections of the standard VITS inserter and are selected with the same DIP switch settings (see Table A–4). See VITS Selection, beginning on page 2–5, for more information about signal selection.
Appendix A: Options 100 500mV 0.5 1.25 2.0 3.0 3.75 4.0 MHz 0mV –40 0 4.7 9.5 15.7 23.2 12.7 17.2 24.6 30.6 38.0 32.0 39.4 45.4 46.8 52.8 54.2 60.2 61.98ms Figure A–5: Cable Multiburst 100 714.28mV 0.1 4.2 MHz 357.14mV 0 –40 0 4.7 9.8 11.0 61.6556ms 60.
Appendix A: Options Factory Configuration Table A–6 lists the factory configuration (through DIP switches S1–S4) of the Option 2 VITS inserter.
Index
Index A O Accessories, 1–2 Auto VIRS, 1–2, 2–4 Options Option 1J, A–2 Option 1M, A–4 Option 2, A–6 Oscillator, adjustment, 6–12 B Bypass, 2–1 lockout, 7–5 remote control of, 2–8, A–4 C Cable-specific VITS, A–6 Cleaning & Inspection, 7–7 Controls, 2–1 D P PAL-M, VITS insertion, A–4 Pass (program video), 2–4 Power switch, 2–2 R Rack adapters, 1–5 Remote control, 1–2, 2–3, 2–8 Repair service, 7–1 Disassembly instructions, 7–8 S F Factory configuration, 2–5 Option 1J, A–4 Option 1M, A–5 Option 2, A–8
Index waveform diagrams, 3–12 Index–2 VITS100 NTSC VITS Inserter Instruction Manual