Ghz Oscillator, A8 - HP 8340B Manual

5-11. 3.7 GHz OSCILLATOR, A8

This procedure is provided primarily for those cases when the A8A1
circuit board has been repaired or replaced.
Reference
Performance Test: None
RF Section (Power Level Control)
Service Section
Description
This procedure monitors the output current of the 100 MHz RF Amplifier that provides the LO signal
for the sampler and adjusts for maximum output. The oscillator phase-lock loop is then opened by
removing jumper A8E3 and the balance is adjusted at the output of the sampler to obtain a syinetrical
square wave of approximately 35 Volts peak-to-peak to drive the phase-lock amplifier.
DIGITAL VOLTMETER
HP 8340B/41B
NOTE
INPUT
AR R4
A8C4
100 MHz
PEAK
ONLY MAKE TEST EQUIPMENT CONNECTIONS AS DIRECTED IN THE PROCEDURE.
Figure 5-33. A8 3.7 GHz Oscillator Test Setup
3.7
FROM
—by
NOTE
OSCI LLOSCOPE
GROUND
Adjustments 5-63