Band 1 Adjustment; Band 2 Adjustment - Agilent Technologies 83620A Service Manual

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For the HP 83640A/50A only, also set:
Tools Menu Disable Doubler
SERVICE
5
94. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
he oscilloscope vertical sensitivity is initially set to
Note
50 mV/division (5 mV/division with a 10:1 probe) providing
a logarithmic scale of
decrease the vertical sensitivity for some frequency bands to
100 mV/division in order to display the entire trace on the
CR (the oscilloscope is already set to 10 mV/division for the
HP 83623A/24A). If you do change the vertical sensitivity by
half, remember that the logarithmic scale must change by half
also.

Band 1 Adjustment.

95. Switch between the fastest sweep time (0 ms) and 200 ms sweep time and
check that power changes less than 2/3 division (
the appropriate rise or delay term (steps 98 through 100) and repeat this
step.
If fast sweep has more power than slow sweep do not readjust.
Note
Continue with the next step.
96. On the synthesizer, set:
SWEEP TIME 0 msec
5 5
97. Press several times to initiate several sweeps and check that a
SINGLE
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drop in power 1 division occurs when in single sweep. If it is less than
1 division, skip the remainder of \Band 1 Adjustment" and continue with

\Band 2 Adjustment".

If the drop in power is 1 division, increase the A term of the delay
adjustment #561 to put the A term at the high end of the peak.
hen repeat from step 95.
98. Adjust calibration constant #561, Y F Dly erm A Hrm 1, to maximize
power for the low end of band 1. Set the calibration constant for the
middle of the peaked range.
HP 8360
(asterisk on)

1.5 dB/division. If necessary,
5
Amplifier/Filter Adjustments

1 dB.) If not, adjust
Adjustments 3-73