WFM90D and WFM91D ServiceManual 5-11
Adjustment Procedures: Digital Section
Perform the following steps to preparethe instrument to be adjusted:
1. Plug the AC power adapter into the WFM90D or WFM91D, and then plug
the adapterinto the AC power source.
2. Set the input terminationswitches to the 75 Ωposition on the WFM90D or
WFM91D.
3. Connect a 75% color bar signal fromthe digital television signal generator to
the VIDEO IN connector.
4. Turnon the instrument.
5. Press the CONFIG button. Select PRESETS, and then select DEFAULT.
6. Read How to Adjust Instrument Settings on page 5--3.

VerticalGain

Perform thefollowing steps to adjust the vertical gain:
1. Select DG1 X1 GAIN from the Calibration menu, and thenselect CAL.
2. Moving between position control(POS) and gain adjust (DG1 X1 Gain),
adjust the arrow buttons for a display amplitudeof exactly 140 IRE
(1000 mV PAL).
3. Select DG CAL MENU, and then select SAVE.
1. Select DG2 X1 GAIN from the Calibration menu, and thenselect CAL.
2. Moving between position control(POS) and gain adjust (DG2 X1 Gain),
adjust the arrow buttons for a display amplitudeof exactly 140 IRE
(1000 mV PAL).
3. Select DG CAL MENU, and then select SAVE.
1. Select DG3 X1 GAIN from the Calibration menu, and thenselect CAL.
2. Moving between position control(POS) and gain adjust (DG3 X1 Gain),
adjust the arrow buttons for a display amplitudeof exactly 140 IRE
(1000 mV PAL).
3. Select DG CAL MENU, and then select SAVE.