Adjustment Help; Squegg Clamp Calibration Constants; Adjusting For The Center Of The Passband - Agilent Technologies 83620A Service Manual

Adjustment Help

he following explanations are provided for a better understanding of the
ampli er/ lter 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.
quegg Clamp Calibration Constants.
Squegg clamp calibration constants are available to limit the power into the
ampli er/multiplier. he band 1 adjustment is set for a speci c output power
at the start of band 1. All other squegg clamp adjustments are set to a default
value to allow maximum output power.
When increasing any squegg clamp calibration constant, power is increased
too far when any of the following occurs:
Any portion of the trace is distorted or power drops out in a portion of the
trace (sphere squegging).
Power drops over a broad frequency range.
Power stops increasing on any portion of the trace.

Adjusting for the Center of the Passband.

he passband and tuning linearity of the ampli er/ lter varies with
frequency. he ampli er/ lter adjustments track the ampli er/ lter
passband with the ampli er/multiplier output frequency over the full
frequency range of the synthesizer.
3-50 Adjustments
Amplifier/Filter Adjustments
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through
the bandpass. Keep
HP 8360