Page 3 - WARRANTY
WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanshipfor 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 defect...
Page 5 - Service Assurance; Service Assurance Advantages
Service Assurance If you have not already purchased Service Assurance for this product, you may do so at any time during the product’swarranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs. Repair Protection extends priority repair services beyond t...
Page 7 - VITS 100 NTSC VITS Inserter Instruction Manual; Table of Contents; General Safety Summary
VITS 100 NTSC VITS Inserter Instruction Manual i Table of Contents General Safety Summary vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary ix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Getting Started VITS Inserter Func...
Page 8 - ii; Replaceable Electrical Parts
Table of Contents ii VITS 100 NTSC VITS Inserter Instruction Manual Cleaning and Inspection 7–7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal and Replacement Instructions 7–8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostics...
Page 9 - iii; List of Figures
Table of Contents VITS 100 NTSC VITS Inserter Instruction Manual iii List of Figures Figure 1–1: A setup for the functional check 1–3 . . . . . . . . . . . . . . . . . . . . Figure 1–2: A typical installation 1–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2–1: The front panel...
Page 10 - iv
Table of Contents iv VITS 100 NTSC VITS Inserter Instruction Manual Figure 5–9: Connecting the RF bridge to the spectrum analyzer/tracking generator 5–18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 5–10: The initial frequency response setup 5–20 . . . . . . . . . . . . . . ....
Page 11 - List of Tables
Table of Contents VITS 100 NTSC VITS Inserter Instruction Manual v List of Tables Table 1–1: Factory VITS, Standard and Option 1M 1–4 . . . . . . . . . . . . . Table 1–2: Factory VITS, Option 1J 1–4 . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–3: Factory VITS, Option 2 1–4 . . . . ....
Page 13 - Only qualified personnel should perform service procedures.; To Avoid Fire or
VITS 100 NTSC VITS Inserter Instruction Manual vii General Safety Summary Review the following safety precautions to avoid injury and prevent damage tothis product or any products connected to it. To avoid potential hazards, use thisproduct only as specified. Only qualified personnel should perform ...
Page 14 - viii; Terms on the Product.; These terms may appear on the product:; Symbols on the Product.; The following symbols may appear on the product:
General Safety Summary viii VITS 100 NTSC VITS Inserter Instruction Manual 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 prope...
Page 15 - ix; Service Safety Summary; Do Not Service Alone.
VITS 100 NTSC VITS Inserter Instruction Manual ix Service Safety Summary Only qualified personnel should perform service procedures. Read this ServiceSafety Summary and the General Safety Summary before performing any serviceprocedures. Do Not Service Alone. Do not perform internal service or adjust...
Page 17 - Getting Started
Page 19 - VITS Inserter Functions; Test Signals
VITS 100 NTSC VITS Inserter Instruction Manual 1–1 Getting Started The Tektronix VITS 100 NTSC VITS Inserter is a high quality signal generatordesigned to insert VITS (Vertical Interval Test Signals) into program video. Itautomatically switches to bypass mode in the event of power failure or loss of...
Page 20 - Accessories and Options; This instrument is shipped with the following accessories:; Source ID
Getting Started 1–2 VITS 100 NTSC VITS Inserter Instruction Manual The VITS inserter can also insert a one-line source identification code on any ofthe available lines in vertical blanking. The Tektronix VM 700A Video Measure-ment Set can then use this code to identify the source of the signal it is...
Page 21 - Functional Check and Installation; as shown in Figure 1–1.; Figure 1–1: A setup for the functional check; VITS inserter PROGRAM OUT waveform.; Functional Check
Getting Started VITS 100 NTSC VITS Inserter Instruction Manual 1–3 Functional Check and Installation It is good practice to perform a functional check of a new instrument beforeinstalling it into your system. Perform the following functional check to confirm proper operation of your newVITS inserter...
Page 22 - Table 1–1: Factory VITS, Standard and Option 1M
Getting Started 1–4 VITS 100 NTSC VITS Inserter Instruction Manual 7. While watching the waveform monitor display, repeatedly press the VITS inserter BYPASS switch to alternate between bypass and normal operatingmodes. Confirm that the appearance of the vertical interval (that is, the “gap”between t...
Page 23 - Connect the VITS inserter to your system as shown in Figure 1–2.; Figure 1–2: A typical installation; Installation
Getting Started VITS 100 NTSC VITS Inserter Instruction Manual 1–5 You can mount the VITS inserter in a standard equipment rack or custom installit. In custom installations, be sure to provide easy access to the signal-selectionDIP switches through the removeable panel in the top of the instrument. ...
Page 25 - Operating Basics
Page 27 - Front Panel; Figure 2–1: The front panel; BYPASS
VITS 100 NTSC VITS Inserter Instruction Manual 2–1 Operating Basics The VITS 100 NTSC VITS Inserter can generate any one of thirteen test signalsfor insertion on lines 17 through 20 in the vertical interval of the video frame. Ifpower fails or the instrument cannot genlock, the VITS inserter automat...
Page 28 - Rear Panel; Figure 2–2: VITS 100 NTSC VITS Inserter rear panel; This instrument uses a power supply that accepts line voltages; Power
Operating Basics 2–2 VITS 100 NTSC VITS Inserter Instruction Manual Rear Panel The VITS 100 NTSC VITS Inserter rear panel, shown in Figure 2–2, contains themains power input, switch, and fuse; the program input and output connectors;DIP switches for source identification code selection; and a remote...
Page 29 - Insertion Options; Program Out
Operating Basics VITS 100 NTSC VITS Inserter Instruction Manual 2–3 The PROGRAM OUT connector is the program video output. Output video canhave user-selected VITS inserted on selected lines. If the instrument cannot lockto the program input video signal, or if power fails, the program automaticallyb...
Page 30 - Figure 2–3: VITS 100 NTSC VITS Inserter source ID signal; Passing Program Video
Operating Basics 2–4 VITS 100 NTSC VITS Inserter Instruction Manual In addition to internally generated test signals, the VITS inserter can pass videosignals that are already in the vertical interval of the program video. Thisincludes the delete/insert lines, which are lines 17 through 20 in all fie...
Page 31 - Table 2–1: Standard Factory-Programmed Signals; VITS Selection; Factory Configuration
Operating Basics VITS 100 NTSC VITS Inserter Instruction Manual 2–5 The VITS 100 NTSC VITS Inserter is configured during manufacture to insertthe signals listed in Table 2–1. See VITS Selection, below, for instructions onconfiguring the VITS inserter to insert the signals that best suit your applica...
Page 32 - Figure 2–4: Location of VITS selection switches; Figure 2–5: The VITS selection DIP switches; Switch/Line Assignments
Operating Basics 2–6 VITS 100 NTSC VITS Inserter Instruction Manual Screws (2) Cover Figure 2–4: Location of VITS selection switches Switches S1 and S2 make the selections for fields 1 and 3, and switches S3 andS4 make the selections for fields 2 and 4. Each DIP switch selects the test signalsfor tw...
Page 33 - Table 2–2: DIP Switch Settings; Switch Settings
Operating Basics VITS 100 NTSC VITS Inserter Instruction Manual 2–7 The switch settings for signal selection are listed in Table 2–2. When a switchsegment is thrown to the left (as viewed from the front of the VITS inserter), it isopen; when thrown to the right, it is closed. Open positions are deno...
Page 34 - Remote Control; Figure 2–6: The REMOTE connector
Operating Basics 2–8 VITS 100 NTSC VITS Inserter Instruction Manual Remote Control Remote control in the standard VITS 100 NTSC VITS Inserter is limited toground-closure Bypass control and (+5 V) outputs for remote BYPASS,UNLOCKED, and POWER indicator lights. See Figure 2–6 and Table 2–3 forthe rear...
Page 35 - Specifications
Page 37 - Specification Tables; Table 3–1: Program channel characteristics
VITS 100 NTSC VITS Inserter Instruction Manual 3–1 Specifications This section contains tables that list the specifications for the VITS 100 NTSCVITS Inserter. All specifications are guaranteed unless noted “typical.” The performance limits in this specification are valid with these conditions: H Th...
Page 38 - Table 3–2: Test Signal and Black Burst general characteristics
Specifications 3–2 VITS 100 NTSC VITS Inserter Instruction Manual Table 3–1: Program channel characteristics (Cont.) Characteristic Information Phase Matching of Inserted Test Signal toProgram Video ± 1 ° (Program Sync and Burst Normal Level) Pulse to Bar Ratio 100% ± 0.5% (Typically within ± 0.25%)...
Page 39 - Table 3–4: FCC Composite characteristics
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–3 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 Chromi...
Page 40 - Table 3–5: FCC Color Bars characteristics
Specifications 3–4 VITS 100 NTSC VITS Inserter Instruction Manual Table 3–5: FCC Color Bars characteristics Characteristic Information Timing See Figure 3–4 Luminance Rise Time 250 ns ± 25 ns Bar Characteristics: White Yellow Cyan Green Magenta Red Blue Black ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Luminance Am...
Page 41 - Table 3–8: NTC7 Combination characteristics
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–5 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 I...
Page 42 - Table 3–9: NTC7 Composite characteristics; Table 3–10: Red Field characteristics
Specifications 3–6 VITS 100 NTSC VITS Inserter Instruction Manual 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 Chrom...
Page 43 - Table 3–12: Vertical Interval Reference Signal characteristics
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–7 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 Charac...
Page 44 - Table 3–15: Genlock characteristics
Specifications 3–8 VITS 100 NTSC VITS Inserter Instruction Manual 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 4.2 MHz Table 3–15: Genlock chara...
Page 45 - Table 3–16: Power Supply characteristics; Table 3–17: Physical characteristics
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–9 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...
Page 46 - Table 3–18: Environmental characteristics
Specifications 3–10 VITS 100 NTSC VITS Inserter Instruction Manual 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 T...
Page 47 - Table 3–19: Certifications and compliances
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–11 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. Compliance wasdemonstrated to the following specif...
Page 48 - Waveform Diagrams
Specifications 3–12 VITS 100 NTSC VITS Inserter Instruction Manual Table 3–19: Certifications and compliances (Cont.) Category Standards or description Additional Compliance IEC61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use. Safety Certification Com...
Page 50 - Figure 3–4: FCC Color Bars
Specifications 3–14 VITS 100 NTSC VITS Inserter Instruction Manual Figure 3–4: FCC Color Bars Figure 3–5: FCC Composite
Page 51 - Figure 3–6: Multiburst
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–15 Figure 3–6: Multiburst Figure 3–7: Multipulse
Page 52 - Figure 3–8: NTC7 Combination
Specifications 3–16 VITS 100 NTSC VITS Inserter Instruction Manual Figure 3–8: NTC7 Combination Figure 3–9: NTC7 Composite
Page 53 - Figure 3–10: Red Field
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–17 Figure 3–10: Red Field Figure 3–11: SIN X/X
Page 54 - Figure 3–13: Cable Multiburst
Specifications 3–18 VITS 100 NTSC VITS Inserter Instruction Manual Figure 3–12: VIRS Figure 3–13: Cable Multiburst
Page 55 - Figure 3–14: Cable Sweep
Specifications VITS 100 NTSC VITS Inserter Instruction Manual 3–19 Figure 3–14: Cable Sweep
Page 57 - WARNING
The following servicing instructions are for use only by qualified personnel. Toavoid injury, do not perform any servicing other than that stated in the operatinginstructions unless you are qualified to do so. Refer to all Safety Summaries beforeperforming any service. WARNING
Page 59 - Theory of Operation
Page 61 - Functional Description; Test Signal Generation.
VITS 100 NTSC VITS Inserter Instruction Manual 4–1 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 descriptionsthat take you to the individual component level of the schematic dia...
Page 62 - Circuit Description; Test Signal Generation
Theory of Operation 4–2 VITS 100 NTSC VITS Inserter Instruction Manual The power inductor is driven by switching the voltage to its primary winding onand off at a rate of approximately 45 kHz. The power inductor is used as anenergy storage device. Energy is stored in the primary during the first hal...
Page 63 - Genlock
Theory of Operation VITS 100 NTSC VITS Inserter Instruction Manual 4–3 samples. The outputs of U4 and U5 are multiplexed by U82 and U83 to increasethe 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 converter...
Page 65 - Signal and Switching
Theory of Operation VITS 100 NTSC VITS Inserter Instruction Manual 4–5 The circuitry that controls signal switching appears on three of the schematicdiagrams in the Diagrams section of this manual. Key circuitry is located ondiagrams 1 (Test Signal Memory), 2 (Test Signal Select), and 5 (Program Inp...
Page 71 - Performance Verification
Page 73 - Incoming Inspection Test
VITS 100 NTSC VITS Inserter Instruction Manual 5–1 Performance Verification This section contains procedures for verifying that the VITS 100 NTSC VITSInserter performs according to the characteristics stated in the Specificationssection of this manual. If the VITS inserter fails to meet a performanc...
Page 74 - Equipment Required; Table 5–1: Equipment Required
Performance Verification 5–2 VITS 100 NTSC VITS Inserter Instruction Manual Equipment Required Table 5–1 lists the test equipment recommended for Performance Verification.Alternate equipment must meet the minimum requirements for the listedequipment. Use of inadequate test equipment may result in fa...
Page 75 - Verification Procedure; NOTE; Power Up
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–3 Table 5–1: Equipment Required (Cont.) Item Example Requirements 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 B...
Page 76 - Select Waveform on the video measurement set.; Figure 5–1: VITS selection DIP switches; Select VITS
Performance Verification 5–4 VITS 100 NTSC VITS Inserter Instruction Manual 2. Select the NTC 7 Composite signal from the television test signal generator. 3. Store the bar and the line time portions of the NTC 7 composite signal as a video measurement set reference signal. 4. Store the C–L gain + d...
Page 77 - Table 5–2: DIP Switch Settings
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–5 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 requiredoperating program, it is essential that the switches be reset to the orig...
Page 78 - Line Input Range
Performance Verification 5–6 VITS 100 NTSC VITS Inserter Instruction Manual Requirement: Stable VITS inserter operation over an AC input range of90–250 V H Vary the autotransformer between 90 and 125 Vac (210 and 250 Vac for “220volt” sources) and verify stable instrument operation. Requirements: DC...
Page 79 - Figure 5–3: Blanking level at 0 IRE; Phase Match of
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–7 IRE Blankinglevel 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 M...
Page 80 - Figure 5–4: Equipment connections for phase matching
Performance Verification 5–8 VITS 100 NTSC VITS Inserter Instruction Manual Waveform/ Vector Monitor TSG/SPG 75 ĂW Terminator Subcarrier Out EXT CW REF Ext Ref 75 ĂW Terminator Black burst VITS Inserter Program In Program Out 75 ĂW Terminator Linearity Out Figure 5–4: Equipment connections for phase...
Page 81 - Set the burst vector to the outer circle and 0; Phase Match Bypass Path
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–9 Requirement: Phase error + 0 ° " 1 ° at F SC . 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 wavef...
Page 82 - Chrominance to
Performance Verification 5–10 VITS 100 NTSC VITS Inserter Instruction Manual 5. Select the NTC 7 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 ...
Page 83 - Differential
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–11 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...
Page 84 - Figure 5–7: Using the video measurement set to compare signals; coaxial cable from the television test signal generator; Move the coax from VITS inserter PROGRAM OUT to MONITOR OUT.
Performance Verification 5–12 VITS 100 NTSC VITS Inserter Instruction Manual 3. Remove the BNC female-to-female adaptor and connect the coaxial cable from the video measurement set CH A to the VITS inserter PROGRAMOUT. See Figure 5–7. VITS Inserter Television test signal generator Video measurement ...
Page 86 - Figure 5–8: Measuring hum rejection; Luminance Risetime
Performance Verification 5–14 VITS 100 NTSC VITS Inserter Instruction Manual Noise generator VITS Inserter Television test signal generator Video measurement set Test Signal 75 ĂW Terminator Program Out Program In Figure 5–8: Measuring hum rejection 6. Select Waveform on the video measurement set. 7...
Page 87 - Chrominance Risetime
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–15 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 vertica...
Page 90 - Set the spectrum analyzer Vertical Scale to 10 dB.; Return Loss and
Performance Verification 5–18 VITS 100 NTSC VITS Inserter Instruction Manual 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 coaxia...
Page 91 - Table 5–3: Spectrum Analyzer Settings
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–19 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 freq...
Page 92 - Figure 5–10: The initial frequency response setup; Frequency Response and
Performance Verification 5–20 VITS 100 NTSC VITS Inserter Instruction Manual 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 coa...
Page 93 - Table 5–4: Multiburst Controls; cable from the peak-to-peak detector output to the test; Figure 5–11: Frequency response display
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–21 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 ...
Page 94 - Figure 5–12: Measuring frequency response; Auto VIRS Insertion
Performance Verification 5–22 VITS 100 NTSC VITS Inserter Instruction Manual 9. Connect the coaxial cable from the TSG/SPG multiburst output to the VITS inserter PROGRAM IN. See Figure 5–12. VITS Inserter TSG/SPG Test oscilloscope Peak-to-peak detector Multiburst Out Program In Program Out Peak-to-p...
Page 95 - Set all 16 switches to the down position.
Performance Verification VITS 100 NTSC VITS Inserter Instruction Manual 5–23 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 lin...
Page 97 - Adjustment Procedure
Page 99 - Adjustment Procedures; C before making any adjustments. Waveform illustrations in; Static Discharge Precautions
VITS 100 NTSC VITS Inserter Instruction Manual 6–1 Adjustment Procedures If VITS 100 NTSC VITS Inserter performance is not within tolerance for aparticular characteristic, determine the cause, repair if necessary, and then use theappropriate adjustment procedure to return the instrument operation to...
Page 100 - Table 6–1: Recommended Test Equipment
Adjustment Procedures 6–2 VITS 100 NTSC VITS Inserter Instruction Manual Table 6–1: Recommended Test Equipment Item Minimum Requirements Example Variable Autotransformer Variable range of 90 to 120 VAC (220 VACoperation use 220 Vac autotransformer) General Radio metered auto transformer:W10MT3W. Wav...
Page 101 - Preliminary Setup
Adjustment Procedures VITS 100 NTSC VITS Inserter Instruction Manual 6–3 With the exception of the video signal connection, this step is the starting pointfor any adjustment. H Disconnect power and remove the cabinet. See the Maintenance section ofthis manual for instructions. H Connect the VITS ins...
Page 102 - Figure 6–1: Adjustments and test points
Adjustment Procedures 6–4 VITS 100 NTSC VITS Inserter Instruction Manual TP3 J17 J19 J18 J20 S8 S7 S4 S3 S2 S1 TP9GND J56J57 J6J5 J54 J28 TP7 GND J9 J22 J33 J32 L12 L13 L14 J2 J3 J4 C165 L1 J12J13 J55 TP10GND R122 TS GAIN R210SIN X/X R127DC ADJ R170 +5 VOLTS ADJUST R171 CURRENT LIMIT R33 PROGRAM GAI...
Page 103 - Check power supply tolerances as shown in Table 6–2.; Adjust genlock performance with the following steps.; Connect the Test Oscilloscope X10 probe to U44 Pin 18.; coaxial cable from the VITS inserter PROGRAM OUT to; Power Supply Adjustment
Adjustment Procedures VITS 100 NTSC VITS Inserter Instruction Manual 6–5 Use this step to adjust the +5 V Adjust, R170, which serves as the reference forall other power supplies in the VITS inserter. NOTE . This adjustment affects all adjustments in the VITS inserter. Therefore, if the +5 V supply i...
Page 104 - Figure 6–2: A setup for genlock adjustments; coaxial cable from the television test signal generator output; Move the coaxial cable from VITS inserter PROGRAM OUT to MONITOR
Adjustment Procedures 6–6 VITS 100 NTSC VITS Inserter Instruction Manual Television Test Signal Generator VITS Inserter Waveform/Vector Monitor Test Signal Program In Program Out CH A input 75 W Terminator Figure 6–2: A setup for genlock adjustments 6. Connect a 75 W coaxial cable from the televisio...
Page 105 - Figure 6–3: VITS selection DIP switches; Gain Adjustments
Adjustment Procedures VITS 100 NTSC VITS Inserter Instruction Manual 6–7 Program color fields 1 and 3 Program color fields 2 and 4 Line 18 Line 17 Line 20 Line 19 Line 18 Line 17 Line 20 Line 19 S1 S2 S3 S4 Figure 6–3: VITS selection DIP switches 12. Change the coaxial cable from the VITS inserter M...
Page 106 - Figure 6–4: Equipment connections for gain adjustments; the bar portion of the signal. Note the amplitude.; Figure 6–5: Equipment for setting gain adjustments
Adjustment Procedures 6–8 VITS 100 NTSC VITS Inserter Instruction Manual Television Test Signal Generator Waveform/Vector Monitor Test Signal CH A input 75 W Terminator BNC Adaptor Figure 6–4: Equipment connections for gain adjustments 2. Select the NTC7 Composite signal from the generator. 3. Set t...
Page 107 - Frequency Response
Adjustment Procedures VITS 100 NTSC VITS Inserter Instruction Manual 6–9 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 fie...
Page 108 - Control; coaxial cable from the detector head output to the peak-to-
Adjustment Procedures 6–10 VITS 100 NTSC VITS Inserter Instruction Manual TSG/SPG Test oscilloscope Peak-to-peak detector OUTPUT INTPUT BNC Adaptor Peak-to-peakdetector head Multiburst Out Figure 6–6: Peak-to-peak detector connections 8. Set the TSG/SPG Multiburst output as shown in Table 6–3. Table...
Page 109 - Figure 6–7: Display for adjusting flatness; Figure 6–8: Setting flatness
Adjustment Procedures VITS 100 NTSC VITS Inserter Instruction Manual 6–11 100 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....
Page 110 - Disconnect the X10 probe from the VITS inserter TP 11.; Oscillator Adjustment
Adjustment Procedures 6–12 VITS 100 NTSC VITS Inserter Instruction Manual 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 ...
Page 111 - Maintenance
Page 113 - Removal and Replacement Instructions (page 7–8); Service Strategy; Warranty Repair Service
VITS 100 NTSC VITS Inserter Instruction Manual 7–1 Maintenance This section discusses the following topics related to maintaining and servicingthe VITS 100 NTSC VITS Inserter: H Service Strategy (below) H Tektronix Service Offerings (below) H Preparation (page 7–2) H Static Sensitive Components (pag...
Page 114 - Preparation; Static discharge can damage any semiconductor component in this; Repair Service
Maintenance 7–2 VITS 100 NTSC VITS Inserter Instruction Manual warranty service at most Tektronix service locations. Do not service theVITS 100 NTSC VITS Inserter yourself during the warranty period; rather,contact your nearest Tektronix representative, field office, or service center forinformation...
Page 115 - Whenever possible keep the component leads shorted together.; covering is capable of generating a static charge.; Use a soldering iron that is connected to earth ground.
Maintenance VITS 100 NTSC VITS Inserter Instruction Manual 7–3 3. Discharge the static voltage from your body by wearing a wrist grounding strap when handling static-sensitive components. Always service assembliesthat contain static-sensitive components at static-free work stations. 4. Remove any de...
Page 116 - Circuit Board Jumpers; symbol imprinted on the circuit board.; Figure 7–1: Moveable plug jumpers on the inserter circuit board
Maintenance 7–4 VITS 100 NTSC VITS Inserter Instruction Manual Circuit Board Jumpers There are 3 plug jumpers for mode selection and 14 test jumpers for use duringrepair or troubleshooting on the VITS 100 NTSC VITS Inserter circuit board. SeeFigure 7–1 for plug jumper locations and Tables 7–1 and 7–...
Page 117 - Table 7–1: Mode Selection Jumpers; symbol printed on the circuit; Mode Selection Jumpers
Maintenance VITS 100 NTSC VITS Inserter Instruction Manual 7–5 All installation procedures that do not require removing the protective cover ofthe VITS inserter are discussed in the Getting Started section of this manual. TheVITS 100 NTSC VITS Inserter does have some additional flexibility, however,...
Page 118 - Table 7–2: Test Jumpers
Maintenance 7–6 VITS 100 NTSC VITS Inserter Instruction Manual Table 7–2: Test Jumpers Function Jumper # Description FactorySetting Genlock Processor Reset J5 Pins 1–2: Reset controlled byhardware watchdog. Pins 2–3: Holds processor inreset mode.No Plug: No hardware resets. 1–2 Hardware Watchdog Res...
Page 119 - Cleaning and Inspection; use commercial cleaners that can discolor or damage the finish.; Cleaning
Maintenance VITS 100 NTSC VITS Inserter Instruction Manual 7–7 Table 7–2: Test Jumpers (Cont.) Function FactorySetting Description Jumper # V Sync J56 Pins 1–2: Used by VITS 200. Pins 2–3: VITS 100. 2–3 Blanking J57 Pins 1–2: Used by VITS 200. Pins 2–3: VITS 100. 2–3 Cleaning and Inspection Preventi...
Page 120 - Removal and Replacement Instructions; removing the top cover.; Remove the four screws from each side of the instrument.; Top Cover
Maintenance 7–8 VITS 100 NTSC VITS Inserter Instruction Manual Removal and Replacement Instructions Use the following procedures to remove and replace the top cover, front panel,inserter circuit board assembly, and oscillator oven. This procedure requires a #1 phillips screwdriver. WARNING. To avoid...
Page 121 - Install the hex nuts on the three rear-panel BNC connectors.; Inserter Circuit Board
Maintenance VITS 100 NTSC VITS Inserter Instruction Manual 7–9 3. Install the instrument top cover. 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 ...
Page 122 - Figure 7–2: Mounting hardware for the inserter circuit board; This procedure requires a #2 POZIDRIV; Oscillator Circuit Board
Maintenance 7–10 VITS 100 NTSC VITS Inserter Instruction Manual BNC Hex nuts (3) J27 Power supply shield Line filter screws (2) Mounting screw Mounting screw Mounting screw Mounting screw Mounting screw Mounting screw Mounting screw Figure 7–2: Mounting hardware for the inserter circuit board This p...
Page 123 - Diagnostics
Maintenance VITS 100 NTSC VITS Inserter Instruction Manual 7–11 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. ...
Page 124 - Table 7–3: The User Diagnostics
Maintenance 7–12 VITS 100 NTSC VITS Inserter Instruction Manual Figure 7–3: Diagnostics switch, S8 To run a user diagnostic (including those run at power up), set S8 to the positionfor the desired diagnostic and then cycle the power off and on. The processorthen runs through the power up process, po...
Page 129 - Parts Ordering Information
VITS 100 NTSC VITS Inserter Instruction Manual 8–1 Replaceable Electrical Parts This section contains a list of the electrical components for the VITS 100 NTSCVITS Inserter. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your...
Page 130 - Parts List Column Descriptions
Replaceable Electrical Parts 8–2 VITS 100 NTSC VITS Inserter Instruction Manual Parts List Column Descriptions Column Column Name Description 1 Component Number The component number appears on diagrams and circuit board illustrations, located in the diagramssection. Assembly numbers are clearly mark...
Page 131 - Manufacturers Cross Index, Electrical Parts
Replaceable Electrical Parts VITS 100 NTSC VITS Inserter Instruction Manual 8–3 Manufacturers Cross Index, Electrical Parts Mfr.Code Manufacturer Address City, State, Zip Code 00213 NYTRONICS COMPONENTS GROUP INCSUBSIDIARY OF NYTRONICS INC ORANGE ST DARLINGTON SC 29532 00779 AMP INC 2800 FULLING MIL...
Page 135 - Replaceable Electrical Parts List
Replaceable Electrical Parts VITS 100 NTSC VITS Inserter Instruction Manual 8–7 Replaceable Electrical Parts List ComponentNumber TektronixPart Number Serial No.Effective Serial No.Discont’d Name & Description Mfr.Code Mfr. Part Number (BEGIN STANDARD ONLY) A1 671–2132–01 B010100 B010112 CIRCUIT...
Page 157 - Diagrams
Page 162 - Table 9–2: A1A1 Component Locator
9–4 VITS 100 NTSC VITS Inserter Instruction Manual # " !$ Table 9–2: A1A1 Component Locator Figure 9–2: A1A1 Oven Board
Page 187 - Replaceable Mechanical Parts
Page 190 - Abbreviations
Replaceable Mechanical Parts 10–2 VITS 100 NTSC VITS Inserter Instruction Manual 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 viewillustrations that follow. 2 Tektronix Part ...
Page 191 - Manufacturers Cross Index, Mechanical Parts
Replaceable Mechanical Parts VITS 100 NTSC VITS Inserter Instruction Manual 10–3 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 9...
Page 192 - Replaceable Mechanical Parts List
Replaceable Mechanical Parts 10–4 VITS 100 NTSC VITS Inserter Instruction Manual Replaceable Mechanical Parts List Fig. &IndexNumber Tektronix PartNumber 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...
Page 194 - Figure 10–1: Exploded view
Replaceable Mechanical Parts 10–6 VITS 100 NTSC VITS Inserter Instruction Manual 1 2 1 3 4 5 6 7 8 9 10 11 12 13 14 14 15 16 17 18 19 20 14 1 14 21 22 23 14 24 25 26 27 28 A1 Figure 10–1: Exploded view
Page 195 - Appendix
Page 198 - Option 1J; Red Field, with modified luminance and chrominance amplitudes; Figure A–1: Option 1J Red Field signal; Signal Characteristics
Appendix A: Options A–2 VITS 100 NTSC VITS Inserter Instruction Manual Option 1J The VITS 100 NTSC VITS Inserter Option 1J contains the following threesignals that are modifications of those in the standard VITS inserter: H Red Field, with modified luminance and chrominance amplitudes H FCC Color Ba...
Page 199 - Figure A–2: Option 1J FCC Color Bar signal
Appendix A: Options VITS 100 NTSC VITS Inserter Instruction Manual A–3 0 –40 100 0 4.7 9.2 15.8 22.4 29.0 35.6 42.2 48.8 55.5 63.56 m s Figure A–2: Option 1J FCC Color Bar signal 0 –40 0 4.7 9.8 15.7 19.3 25.8 36.1 44.4 51.5 57.4 63.56 m s 100 80 Figure A–3: Option 1J Multipulse signal The factory-p...
Page 200 - Table A–2: Option 1J Factory Programmed VITS Insertions; Option 1M; Making Measurements
Appendix A: Options A–4 VITS 100 NTSC VITS Inserter Instruction Manual 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 alt...
Page 201 - Figure A–4: Video Measurement Set application for Option 1M; Option 1M Signals
Appendix A: Options VITS 100 NTSC VITS Inserter Instruction Manual A–5 VITS Inserter Program In Program Out Monitor Out VITS Inserter Program In Program Out VM700AOption 1 To plant PAL-M Signal with NTSC VITS PAL-M Signal with NTSC VITS and inserted NTSC Sync and Burst PAL-M Signal with NTSC VITS PA...
Page 202 - Option 2; Table A–4: Option 2 DIP Switch Settings; Table A–5: Cable System Test Signal Characteristics
Appendix A: Options A–6 VITS 100 NTSC VITS Inserter Instruction Manual Option 2 VITS 100 NTSC VITS Inserter Option 2 generates Cable Sweep and CableMultiburst signals to accommodate cable system measurements. These signalsreplace the VIRS and Auto VIRS selections of the standard VITS inserter andare...
Page 203 - Figure A–5: Cable Multiburst
Appendix A: Options VITS 100 NTSC VITS Inserter Instruction Manual A–7 –40 0 9.5 15.7 17.2 23.2 30.6 45.4 52.8 54.2 61.98 m s 100 500mV 0mV 0.5 1.25 2.0 3.0 3.75 4.0 MHz 4.7 24.6 32.0 38.0 39.4 46.8 60.2 12.7 Figure A–5: Cable Multiburst 0 –40 0 4.7 9.8 11.0 60.5 61.6556 m s 100 714.28mV 357.14mV 0....
Page 204 - Table A–6: Option 2 Factory Programmed VITS Insertions
Appendix A: Options A–8 VITS 100 NTSC VITS Inserter Instruction Manual Table A–6 lists the factory configuration (through DIP switches S1 – S4) of theOption 2 VITS inserter. Table A–6: Option 2 Factory Programmed VITS Insertions Line Field Signal 17 1 Cable Multiburst signal 17 2 Cable Sweep signal ...
Page 205 - Index
Page 207 - Index–1
VITS 100 NTSC VITS Inserter Instruction Manual Index–1 Index A Accessories, 1–2Auto VIRS, 1–2, 2–4 B Bypass, 2–1 lockout, 7–5remote control of, 2–8, A–4 C Cable-specific VITS, A–6Cleaning & Inspection, 7–7Controls, 2–1 D Disassembly instructions, 7–8 F Factory configuration, 2–5 Option 1J, A–4Op...
Page 208 - Index–2
Index Index–2 VITS 100 NTSC VITS Inserter Instruction Manual waveform diagrams, 3–12