Agilent Technologies 8565EC Service Guide

Chapter 11 567
Synthesizer Section
Unlocked Fractional N PLL
The polarity of the output of the loop gain (block AP, TP12) should be
the same as the polarity of the input (TP11).
The integrator op amp (U106) output (TP13) should try to go very
positive (about +12 V) if its average input (TP12) is positive. If its
average input is negative, it should try to go very negative (about
−4 V). If its average input is zero and it is functioning correctly, it
may take on any output voltage between−4 V and +12 V

Agilent Technologies 8565EC Specifications

General

Brand	Agilent Technologies
Model	8565EC
Category	Measuring Instruments
Language	English