Tektronix TPG20 - Manuals

Tektronix TPG20 – Manual in PDF format online.

Manuals:

Manual

Manual Tektronix TPG20

100

101

102

Summary

Page 2 - Copyright

Copyright Tektronix, Inc., 1993,1994. All rights reserved. Printed in U.S.A. Information in this publication supersedes that in all previously pub-lished material. Specifications and price change privileges reserved. Thefollowing are registered trademarks: TEKTRONIX and TEK. For further information,...

Page 3 - WARRANTY; TICE OF THE POSSIBILITY OF SUCH DAMAGES.

WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without ch...

Page 5 - Table of Contents; Section 1; Performance Check and Calibration Procedures; Section 2; Replaceable Parts List; Section 3; Diagrams; List of Figures

TPG20 Service i Table of Contents Section 1 Performance Check and Calibration Procedures 1–1 . . . . . . . . . . . . . Recommended Equipment List 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Instruments 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Page 6 - Contents; ii

Page 7 - iii; Service Safety Summary; Safety Terms and Symbols; These terms may appear in this manual:; Terms in This Manual

TPG20 Service iii Service Safety Summary Only qualified personnel should perform service procedures. Read this ServiceSafety Summary before performing any service procedures. Safety Terms and Symbols These terms may appear in this manual: WARNING. Warning statements identify conditions or practices ...

Page 8 - iv; To Avoid Fire or Shock Hazards:; between the supply conductors, or between either supply

Service Safety Summary iv TPG20 Service To Avoid Fire or Shock Hazards: Do not perform internal service or adjustments of this product unless anotherperson capable of rendering first aid and resuscitation is present. Before servicing, remove jewelry such as rings, watches, and other metallicobjects....

Page 9 - Preface

TPG20 Service v Preface This manual provides a limited set of service information for the TEKTRONIXTPG20 Test Pattern Generator and is intended for use by personnel who arequalified to work inside the instrument. There is a separate manual that isincluded with the instrument which provides operating...

Page 13 - Recommended Equipment List; NOTE; Video Measurement set; Electrical Instruments

TPG20 Service 1–1 Section 1Performance Check and Calibration Procedures This section consists of two separate procedures. The first, a PerformanceCheck, is used to determine compliance with the Performance Requirements inthe Specification. The Performance Check is followed by a CalibrationProcedure,...

Page 15 - Video Amplitude Calibrator; For example: TEKTRONIX WFM601i; Personal Computer; Range: At least 46 dB return loss sensitivity, 50 kHz to 10 MHz.; Auxiliary Equipment

Performance Check and Calibration Procedures TPG20 Service 1–3 7. Frequency Counter Range: 10 Hz to 135 MHz. Accuracy: " 0.001%. Ratio architecture. For example: Tektronix DC 5009 installed in a TM 5000-Series PowerModule. 8. Video Amplitude Calibrator Signal, adjustable square wave 0.0 to 999.9...

Page 16 - Centronics Parallel cable

Performance Check and Calibration Procedures 1–4 TPG20 Service 13. Coaxial Cable Three 75 cables required, two 50 cables required. For example: 75 – 42-inch (Tektronix Part No. 012–0159–00). 50 – 42-inch (Tektronix Part No. 012–0057–01). 14. 50 to 75 Minimum Loss Attenuator (DC Coupled) For example:...

Page 17 - Performance Check; Visual Inspection; visible under normal lighting conditions.; Subcarrier Accuracy; Figure 1–1: Basic steps to set the TPG20 output pattern

Performance Check and Calibration Procedures TPG20 Service 1–5 Performance Check 1. Visual Inspection a. Connect the TPG20 to a power source, and turn the power on. b. Check – the front panel LCD contrast. The readout should be easily visible under normal lighting conditions. c. Check – all front pa...

Page 18 - b. Connect the equipment as shown in Figure 1–2, using the TSG–170A; Figure 1–2: Initial equipment connections for checking the TPG20

Performance Check and Calibration Procedures 1–6 TPG20 Service b. Connect the equipment as shown in Figure 1–2, using the TSG–170A and 1780R. c. Verify the presence of a standard NTSC Black Burst signal with thewaveform monitor. d. Set the frequency counter Function to Ratio B/A, and AVG set to 10 7...

Page 19 - g. Connect the equipment as shown in Figure 1–2, using the TSG–271 and; d. Use VM700A to check amplitude accuracy of 1.0 V; using

Performance Check and Calibration Procedures TPG20 Service 1–7 PAL 4.43361875 MHz 1 Hz f. Set TPG20: FORMAT – 625/50 COMPOSITE PAL/D2 Groups; FLAT FIELDS; BLACK 625 PAL/D2 g. Connect the equipment as shown in Figure 1–2, using the TSG–271 and 1781R. h. Connect frequency counter (referenced to WWV) s...

Page 21 - b. Test both B Analog Outputs on the TPG20 using the VM700A lumi-

Performance Check and Calibration Procedures TPG20 Service 1–9 4. Bandwidth 6.5 MHz ± 0.1 dB (NTSC and PAL) a. Set TPG20: FORMAT 625/50 COMPONENT RGB Groups: SWEEPS; LINE SWEEP 6.5 625 RGB b. Using Channel A of the 1781 waveform monitor, check flatness of the swept frequency on all six of the TPG20 ...

Page 24 - Vertical Phase Adjustment – 1 Frame – PAL; from the TPG20 TRIGGER OUT connector.; a. Connect the TSG–271 Black Burst signal to the TPG20 REFERENCE; Set VM700 to vector mode – burst reference to CH B.; Check Serial Digital Outputs PAL D2

Performance Check and Calibration Procedures 1–12 TPG20 Service e. Set TPG20 Genlock to On. Select Lock on: Sync Lock. Verify thatgenlock occurs within 20 seconds and Genlock light is on (not blinking). f. Select H–phase on the TPG20 and rotate knob to verify that horizontalphase can be adjusted at ...

Page 30 - where n is the memory recalled.; END OF PERFORMANCE CHECK PROCEDURE

Performance Check and Calibration Procedures 1–18 TPG20 Service where ESC is the escape key (1B hex), n is a number from 1 to 9. ( ASCII ) and <CR> is carriage return. Ensure that the unit recalls the correct memory settings. If a memory issuccessfully recalled, then the unit echoes the follow...

Page 31 - Adjustment Procedure; LCD Contrast Adjustment; a. Press the SYSTEM button until the “Set:RS232 speed” menu appears.; Press the SELECT button to save the setting.

Performance Check and Calibration Procedures TPG20 Service 1–19 Adjustment Procedure Remove TPG20 top cover to gain access to adjustments and test links. 1. LCD Contrast Adjustment a. Connect the TPG20 to an ac power source, and turn the power on. b. Adjust – RV1 on the back of the front panel board...

Page 33 - Table 1–1: Available TPG20 Crystal Options; Press TPG20 SELECT button to save this setting.

Performance Check and Calibration Procedures TPG20 Service 1–21 Table 1–1: Available TPG20 Crystal Options Type Frequency Usage Format 0 13.50 MHz 625/525 D1 1 17.73447 MHz PAL & SECAM 4fsc 2 14.318180 MHz NTSC 4fsc 3 14.328225 MHz PAL N 4fsc 4 14.3024 MHz PAL M 4fsc 5 18.56250 MHz 1125/60 &...

Page 34 - DAC Offset Calibration; Press the TPG20 SELECT button to save this setting.; h. Press TPG20 SYSTEM button to select – Set: DAC C Offset

Performance Check and Calibration Procedures 1–22 TPG20 Service Repeat parts d through f of this step for the following formats using theGroups: FLAT FIELDS; WHITE 100% in each format. FORMAT 625/50 COMPOSITE PAL/D2 FORMAT 625/50 COMPONENT D1/YPrPb FORMAT 625/50 COMPONENT YPrPb FORMAT 625/50 COMPOSI...

Page 35 - TPG20 power back on without holding any buttons down.

Performance Check and Calibration Procedures TPG20 Service 1–23 j. Press the TPG20 SELECT button to save this setting. 7. Load Factory Settings a. Press the TPG20 SYSTEM button to select Set:Factory Presets b. Press the TPG20 SELECt button to load factory settings. c. Switch TPG20 off. d. Remove the...

Page 38 - q. Using the TPG20 SYSTEM button, select ”Factory Presets”, then press; b. Examine the signal on pin 3 of N135 using a probe on CH 2 of the; END OF ADJUSTMENT PROCEDURE

Performance Check and Calibration Procedures 1–26 TPG20 Service o. Set TPG20: FORMAT 625/50 COMPONENT RGB Groups: FLAT FIELDS; WHITE 100% 625 RGB p. Adjust – RV12 for minimum run through of the two signals as observed on the oscilloscope. (note: this adjustment has no effect if precisioncrystals are...

Page 41 - Parts Ordering Information; Part number

TPG20 Service 2–1 Section 2Replaceable Parts List This section contains a list of the components that are replaceable for the TPG20.Use this list to identify and order replacement parts. This Replaceable Parts Listcombines electrical and mechanical parts instead of putting them into separatelists. P...

Page 42 - Replaceable Parts

Replaceable Parts 2–2 TPG20 Service A A RMMG 2021004A 1 lU FRAME 4 FIELDtRACK MOUNTS PAINTED & SCREENED A A RMH3 RCG–3 4 CARD GUIDES–RICHCO RCG–3 A A RMF9 06 1 FAN 40mm 12V DC SANYO 109P0412F602 TEK P/N 119–4800–00 A A RMGl M4x2.5P 4 SCREW M4x2.5 POZI PAN A A RMG6 WM4IS 4 M4 INTERNAL SHAKEPROOF ...

Page 69 - Test Pattern Generator Board

Page 102 - POWER SUPPLY BOARD

+12V L2 D6 LINE NEUTRAL COMMON F1 1 AMP C1 0.1UF C2 0.1UF C3 4700PF C4 4700PF C5 4700PF R2 15 L1 UH C6 100UF C7 100UF R12 150K 1W B1 D1 R1 10K 5W C8 0.01UF CR7 1 2 TR1A L3 C15 4700UF C18 C12 2200UF 7 8 TR1D 9 10 TR1E 11 12 TR1F GND +5V C14 0.22UF C17 C20 C13 1000UF C19 1000UF C16 1000UF R14 390 R13 ...