Adjustment Procedures:Analog Section
5-10 WFM90D and WFM91D Service Manual
Yellow
Cyan
Blue
Blue
Figure5 -1: NTSC graticule showing the vector gain adjustment
7. Select PHASE and use the arrowbuttons to position the burst vector
exactly on the180_graticule line.
8. Select X5 GAIN, and then select X5 PHASE.
9. Use the arrowbuttons to position the burst vector exactly on the 180_
graticuleline.
10. Select CAL MENU, and then select SAVE.
Audio Gain
Perform thesesteps to adjust the audio gain:
1. Connect the output from the audio generatorto the AUDIO IN connector.
2. Set the audio generatorfor 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 thenselect CAL.
6. Use the arrowbuttons to position the signal display exactly on the 8 dBu
graticulelines.
7. Select CAL MENU, and then select SAVE.