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Adjustment Procedures: Analog Section
WFM90D and WFM91D Service Manual
5-9
23. Select CAL MENU, and then select SAVE.
24. Select X1 GAIN from the Operating menu, and INT REF from the
Configuration menu.
Vector Quadrature Phase
Perform these steps to adjust the vector quadrature phase:
1. Replace the signal on the VIDEO IN connector with a 75% color bar signal
from the television signal generator using a 75 Ω in-line termination.
2. Select VECTOR display mode.
3. WFM91D ONLY — Select ALT ON from the Configuration menu.
4. Select QUAD PH from the Calibration menu, select CAL, and then select
RY OFFSET.
5. Adjust the arrow buttons for the best center dot overlay.
6. Select QUAD PH.
7. Adjust the arrow buttons for the best circle overlay.
8. Select CAL MENU, and then select SAVE.
9. WFM91D ONLY — Select ALT OFF from the Configuration menu.
Vector Gain and X5 Gain Phase
Perform these steps to adjust the vector gain and X5 gain phase:
1. WFM90D ONLY — Verify that the television signal generator has setup
turned on.
2. Select VEC GAIN from the C alibration menu, select CAL, and then select
TEST ON.
3. Adjust the
Yand B buttons so that the vector dots land in the center of the
red and cyan graticule target boxes. See Figure 5--1.
4. Adjust the
A and " buttons so that the vector dots land in the center of the
yellow and blue graticule target boxes. See Figure 5--1.
5. Select CAL MENU, and then select SAVE.
6. Select X5 PHASE from the Calibration menu, and then select CAL.