HDVG7 module adjustment procedures
11. Locate variabl
e resistor R530 on the HDVG7 circuit board. (See Figure 13-1.)
12. Press the Clear Data button o n the oscilloscope and wait about 5 seconds
before procee
ding to the next step.
13. Adjust R530 so that the signal amplitude is equal to the height noted in step 8.
14. Repeat steps 12 and 13 until the average attenuation measured value (μ)is
within 1 mV of the corrected attenuation value.
15. Record the new measured attenuation corrected value in the Signal 1 amplitude
row After adjustment value column of the HDVG7 output amplitude table.
16. Option BK only: Adjust the BLACK 1 output amplitude as follows:
a. On the HDVG7, move the cable from the SIGNAL 1 output to the
BLACK 1 output.
b. On the HDVG7, move the cable from the SIGNAL 2 output to the
BLACK 2 output.
c. Locate variable resistor R630 on the HDVG7 circuit board. (See
Figure 13-1.)
d. Repeat steps 8 through 15 for the BLACK 1 output using R630 to adjust
the amplitude.
This completes the output level adjustment procedures.
TG8000 Multiformat Test Signal Generator Service Manual 13–9
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