HP 8340b User Manual

A31
M/N
PHASE
DETECTOR
The M/N
phase
detector
assembly
contains
a
phase
detector,
a
mixer,
and
two
programmable
fre¬
quency
dividers
(refer
to
Figure
B-1).
The
mixer down converts
the
355
to
395
MHz
M/N
VCO
output
to
5
to
45
MHz
by
mixing
it
with
the
400
MHz
reference
signal
from
A30
100
MHz
VCXO.
This
5
to
45
MHz
IF
signal
is
frequency
divided
by
the
M
divider,
which
is
programmed
to
divide
by
an
integer ranging
from
8
to
27.
The
output
of the
M
divider
is
phase/frequency
compared
with
the
output
of
the
N
divider:
The
N
divider divides
the
20
MHz
reference loop
signal
by
an integer
ranging
from
13
to
36.
The
N
and
M
divider
outputs
are
phase/frequency compared
and
the
resultant
error
signal
tunes
the
A32
M/N
VCO.
This
keeps
the M/N
loop
phase-locked
to
the
reference
loop.
HP
8340B/41B
M/N
Loop
Theory
of
Operation
B-5/B-6

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English