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Adjustment Help
he following explanations are provided for a better understanding of the
ampli er/multiplier adjustments. Refer to these explanations as often as
necessary. hey will help make these adjustments easier. ( he adjustment
procedure follows.)
Offset and Gain Adjustments.
For all o set and gain adjustments, adjust
adjusting until the power peaks and then drops o . hen reset the
adjustment to the peaked point.
For all o set and gain adjustments, if power stays peaked over several
calibration constant values, set the calibration constant to the middle value
of the peaked range.
Adjusting to the Center of the Passband.
he ampli er/multiplier has a tracking lter on its output. Its purpose
is to pass the selected RF output frequency and reject harmonics. he
objective of this procedure is to track the bandpass lter with the RF output
frequency over a variety of sweep conditions and frequency ranges. E ects of
the auxiliary output may mask the true center of the bandpass. Always tune
to the lower peak (lower calibration constant value).
RD Bias Adjustment.
Adjust these calibration constants
peak power is achieved.
After reaching peak power, decrease the calibration constant value by
15 counts when adjusting the A term and decrease power by 1/2 dB
(approximately 1/3 division) when adjusting the B term.
ingle Band Delay Compensation Adjustments.
If a drop in power greater than 1 division occurs when in single sweep,
increase the A delay term to put the A term at the high end of the peak. For
example, for the following calibration constant values:
Start of the peak = 1800
Middle of the peak = 1950
End of the peak = 2100
Set the A term to 2050
3-32 Adjustments
Amplifier/Multiplier Adjustments
All manuals and user guides at all-guides.com
through
into squegging
the bandpass. Keep
and then back o until
HP 8360
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