HP 8753D Option 011 User Manual

Troubleshooting
When One
or More
Inputs
Look
Good
Since at
least one
input
is
go
o
d,
all
of
the
common
receiv
er
circuitry b
eyond
the m
ultiplexer is
functional.
Only
the
status
of
the
individual sampler/mixers
and their
individual signal
paths
is
undetermined.
Check
the
4
kHz
Signal
1.
Connect
a
cable
from
the
RF
OUT
to
input
R.
2.
Press
4
PRESET
5
4
MENU
5
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
CW
FREQ .
3.
Use an
oscilloscop e
to c
heck
the
4
kHz
output
of
the
sampler/mixer
in
question
at
the
A10
assem
bly
.
The
input
and
output
access
pins
are
listed
in
T
able
8-2
.
The
signal
should
resem
ble
the
w
a
v
eform
of
Figure
8-6
.
If
the signal
is go
od,
con
tin
ue
with
\Chec
k
the
T
race
with
the
Sampler
Correction
Constan
ts
O."
If
the
signal
is
bad,
skip
ahead
to
\Chec
k
1st
LO
Signal
at
Sampler/Mixer."
Table
8-2. 2nd
IF (4
kHz)
Signal
Locations
Mnemonic Description A10
Lo
cation
Signal
Source
IFR 4
kHz
A10P1-1,
31
A4P1-6
IF
A
4
kHz
A10P1-4,
34
A5P1-6
IFB 4
kHz
A10P1-7,
37
A6P1-6
Figure
IFW
AVE8
here.
Figure 8-6. 2nd IF (4 kHz) Waveform
8-8 Receiver Troubleshooting DRAFT
3/21/106 15:13
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HP 8753D Option 011 Specifications

General

Brand	HP
Model	8753D Option 011
Category	Measuring Instruments
Language	English