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WFM90D and WFM91D Service Manual
5-11
Adjustment Procedures: Digital Section
Perform the following steps to prepare the instrument to be adjusted:
1. Plug the AC power adapter into the WFM90D or WFM91D, and then plug
the adapter into the AC power source.
2. Set the input termination switches to the 75 Ω position on the WFM90D or
WFM91D.
3. Connect a 75% color bar signal from the digital television signal generator to
the VIDEO IN connector.
4. Turn on the instrument.
5. Press the CONFIG button. Select PRESETS, and then select DEFAULT.
6. Read How to Adjust Instrument Settings on page 5--3.
Vertical Gain
Perform the following steps to adjust the vertical gain:
1. Select DG1 X1 GAIN from the Calibration menu, and then select CAL.
2. Moving between position control (POS) and gain adjust (DG1 X1 Gain),
adjust the arrow buttons for a display amplitude of 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 then select CAL.
2. Moving between position control (POS) and gain adjust (DG2 X1 Gain),
adjust the arrow buttons for a display amplitude of 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 then select CAL.
2. Moving between position control (POS) and gain adjust (DG3 X1 Gain),
adjust the arrow buttons for a display amplitude of exactly 140 IRE
(1000 mV PAL).
3. Select DG CAL MENU, and then select SAVE.