17. Signal ID Oscillator Adjustment
9. While observing the HP
8566A/B
display, adjust A15C629 SIG ID for the highest
obtainable frequency with less than 3 dB decrease in amplitude from maximum. Read this
frequency from the frequency counter and record as Fs
dB
HIGH.
F3
dB
HIGH =
Hz
10. Observe the HP
8566A/B
display as you adjust A15C629 SIG ID for the lowest obtainable
frequency with less than 3 dB decrease in amplitude from maximum. Record the
frequency counter reading as Fs
dB
LOW.
F3
dB
LOW =
MHz
11. Calculate the difference between Fs
dB
HIGH
and Fs
dB
LOW,
then divide results by four.
Enter the result as
FOFFSET.
FOFFSET =
kHz
12. Add
FOFFSET
to Fs
dB
LOW
recorded in step 10 and record the result as
FSIGID.
F
SIGID
=
MHz
13. Adjust A15C629 for a frequency counter reading equaling
FSIGID.
The final adjusted
frequency must equal 10.7 MHz
f50
kHz.
Adjustment Procedures 2-65
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