Tektronix TPG20 Manuel d'utilisateur télécharger pdf (Page 21)

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

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Tektronix TPG20 Manuel d'utilisateur Page 21