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Adjustment Procedures: Analog Section
5-10
WFM90D and WFM91D Service Manual
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Figure 5- 1: NTSC graticule showing the vector gain adjustment
7. Select PHASE and use the arrow buttons to position the burst vector
exactly on the 180_ graticule line.
8. Select X5 GAIN, and then select X5 PHASE.
9. Use the arrow buttons to position the burst vector exactly on the 180_
graticule line.
10. Select CAL MENU, and then select SAVE.
Audio Gain
Perform these steps to adjust the audio gain:
1. Connect the output from the audio generator to the AUDIO IN connector.
2. Set the audio generator for a 1 kHz tone output with an amplitude of
+8.0 dBu. Select Signal On from the audio generator.
3. Select the AUDIO display mode on the WFM90D or WFM91D.
4. Select 8dBufrom the Operating menu.
5. Select AUD GAIN from the Calibration menu, and then select CAL.
6. Use the arrow buttons to position the signal display exactly on the 8 dBu
graticule lines.
7. Select CAL MENU, and then select SAVE.