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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 Analog Outputs ±0.1dB
(equals approximately ±1.0%).
c. Set TPG20:
FORMAT 525/60 COMPOSITE NTSC/D2
Groups: SWEEPS; LINE SWEEP 6.5 525 NTSC/D2
d. Using Channel A of the 1780 waveform monitor, check flatness of the
swept frequency on all four of the TPG20 A and B Outputs ±0.1dB
(equals approximately ±1.0%).
5. Linearity Error < 1.0%
a. Set TPG20:
FORMAT 525/60 COMPOSITE NTSC/D2
Groups: LINEARITY; STAIRCASE – 5 525 NTSC/D2
b. Test both B Analog Outputs on the TPG20 using the VM700A lumi-
nance nonlinearity measurement mode. Linearity error < 1.0%.
c. Set TPG20:
FORMAT 625/50 COMPOSITE PAL/D2
Groups: LINEARITY; STAIRCASE – 5 625 PAL/D2
d. Test both B Analog Outputs on the TPG20 using the VM700A lumi-
nance nonlinearity measurement mode. Linearity error < 1.0%.
6. Differential Gain < 0.75%
Differential Phase < 0.5°
a. Set TPG20:
FORMAT 625/50 COMPOSITE PAL/D2
Groups: LINEARITY; MODULATED RAMP 625 PAL/D2