Tektronix WFM90D, Быстрый старт

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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 terminator.
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 Calibration menu, select CAL , and then select
TEST ON
.
3. Adjust the
Y
and
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 .