Adjustment Procedures:Analog Section
WFM90D and WFM91D ServiceManual 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.
VectorQuadrature Phase
Perform thesesteps to adjust the vector quadraturephase:
1. Replace the signal on the VIDEO IN connectorwith a 75% color bar signal
from the television signal generatorusing a 75 Ωin-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
RYOFFSET.
5. Adjust the arrowbuttons for the best center dot overlay.
6. Select QUAD PH.
7. Adjust the arrowbuttons for the best circle overlay.
8. Select CAL MENU, and then select SAVE.
9. WFM91D ONLY— Select ALT OFF from the Configuration menu.
VectorGain and X5 Gain Phase
Perform thesesteps to adjust the vector gain and X5 gain phase:
1. WFM90D ONLY— Verify that the television signalgenerator has setup
turned on.
2. Select VEC GAIN from the Calibration menu, select CAL, and then select
TEST ON.
3. Adjust the Yand Bbuttonsso that the vector dots land in the centerof the
red and cyan graticuletarget boxes. See Figure 5--1.
4. Adjust the Aand "buttonsso that the vector dots land in the centerof the
yellow and blue graticuletarget boxes. See Figure 5--1.
5. Select CAL MENU, and then select SAVE.
6. Select X5 PHASE from the Calibration menu, and then selectCAL.