HP 8340b - A30100 Mhz; A34 Reference Loop MN Loop Motherboard; Assemblies; Reference Loop MN Loop Introduction

Reference
Loop
—
M/N
Loop
Introduction
ASSEMBLIES
Reference
Loop
The
reference
loop
produces
all
of
the
reference
signals
that
are
used
in
the
other
phase-locked
loops.
The
reference
loop consists
of the
following
assemblies:
•
A29
reference
phase
detector
assembly
•
A30100
MHz
VCXO
(voltage-controlled
crystal oscillator)
assembly
•
A34
reference
loop
—
M/N
loop
motherboard
•
A5110
MHz
standard
M/N
Loop
The
M/N
loop
generates
the 177-197
MHz
signal
that drives
the
A48
sampler
in
the
YO
loop.
The
M/N
Loop consists
of
the
following
assemblies:
•
A31
M/N
phase
detector
assembly
•
A32
M/N
VCO
(voltage-controlled
oscillator)
assembly
•
A33
M/N
output
assembly
•
A34
reference
loop
—
M/N
loop
motherboard
HP
8340B/41B
Reference Loop
-
M/N
Loop Introduction
B-l