Sony Tektronix WFM 1125 Service Manual page 105

WFM 1125 Option 0A/0B/0C/0D Service Manual
Initial Setups.
TSG1001:
COLOR BARS:
Oscilloscope:
Waveform: . . . . . . . . . . . . . . .
Vertical scale: . . . . . . . . . . . . .
Vertical offset:
Vertical position:
Horizontal scale:
Trigger mode: . . . . . . . . . . . . .
Trigger source:
Trigger level: . . . . . . . . . . . . .
Procedure.
1. Align the 0 mV level of the signal with the center graticule on the oscillo-
scope.
2. Change the oscilloscope vertical offset to 700mV.
3. Verify and adjust the A10 R502 to align the 700 mV level with the center
graticule on the oscilloscope.
4. Change the oscilloscope vertical offset to 0 V.
5. If the 0 mV level is within " 0.5 divisions from the center graticule, go to
the next step. If not so, go back step 1.
6. Change the oscilloscope waveform to CH1 off, waveform to CH2, and
vertical offset to –350 mV.
7. Align the –350 mV level of the signal with the center graticule on the
oscilloscope.
8. Change the oscilloscope CH2 vertical offset to 350 mV.
9. Verify and adjust the A10 R522 to align the 350 mV level with the center
graticule on the oscilloscope.
10. Change the oscilloscope CH1 vertical offset to –350 mV.
. . . . . . . . . . . 100 % COLOR BARS
CH1
10 mV/div
. . . . . . . . . . . . 0 V
. . . . . . . . . . . Center
10 ms/div
. . . . . . . . . . .
EDGE
. . . . . . . . . . . . CH1
–140 mV
Adjustment Procedures
5-7