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Performance Check and Calibration Procedures
1–24
TPG20 Service
9. Frequency Response Adjustment
a. Set TPG20:
FORMAT 625/50 COMPONENT RGB
Groups: SWEEPS; LINE SWEEP 6.5 625 RGB
b. Connect the TPG20 A Analog Output to the 1781R set to waveform
monitor display.
c. Adjust – RV2 for flat response ± 0.1 dB.
d. Connect the TPG20 B Analog Output to the 1781R.
e. Adjust – RV5 for flat response ± 0.1 dB.
f. Connect the TPG20 C Analog Output to the 1781R.
g. Adjust – RV8 for flat response ± 0.1 dB.
h. Set TPG20:
FORMAT 525/60 COMPONENT RGB
Groups: SWEEPS; LINE SWEEP 5.5 525 RGB
i. Connect TPG20 A Analog Output to the 1780R set to waveform
monitor display.
j. Adjust – RV3 for flat response ± 0.1 dB.
k. Connect TPG20 B Analog Output to the 1780R.
l. Adjust – RV4 for flat response ± 0.1 dB.
m. Connect TPG20 C Analog Output to the 1780R.
n. Adjust – RV9 for flat response ± 0.1 dB.
10. Serial Digital Output
a. Set TPG20:
FORMAT 525/60 COMPONENT D1/YPrPb
Groups: BARS; SMPTE COLOR BARS 525 D1/YPrPb
b. Install a shorting link (jumper) on LK1.
c. Connect frequency counter to TP2.
d. Adjust – RV10 for 27.0 MHz.