HP 8340B Manual page 263

5-11.
3.7 GHz OSCILLATOR, A8
NOTE
This procedure
is provided primarily for those cases when the
A8A1
circuit board has been repaired or replaced.
Reference
Performance Test: None
Service Section
RF Section
(Power
Level Control)
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 symetrlcal
square wave of approximately 35
Volts
peak-to-peak
to drive the phase-lock amplifier.
OSCILLOSCOPE
DIGITAL VOLTMETER
A8R4
NOTE
ONLY
MAKE FEST EQUIPMENT CONNECI-IONS AS DIRECTED
IN THE PROCEDURE.
Figure 5-33.
A8 3.7 GHz
Osctftotor Test Setup
HP 8340B/41B
Adjustments