Agilent Technologies HP 83711B Service Guide

Troubleshooting
YIG
Driver
Assembly
(A9)
Troubleshooting
The
following
error
groups
pertain
to
the
YIG
Driver
assembly
.
Error Group Description
16 =
Y
Data Readback
Errors
17
=
Y
ABUS
Errors
18
=
Y
MSB
Errors
19 =
Y
Low/High Band
Voltage
Errors
Note
Prior
to
replacing
an
assembly
or
module
,
verify
that
the power
supply voltages
are
within
specication
at
the
power
connection
to
the
assembly
or module
.
Data
Readback
Errors
Error
Group
Description
16
=
1
Data
Readback
from
the
YIG
Driver
Assy
16
=
2
Data
Readback
from
the
YIG
Driver Assy
16
=
4
Data
Readback
from
the
YIG
Driver
Assy
16
=
8
Data
Readback
from
the
YIG
Driver
Assy
16
=
10
Data
Readback
from
the
YIG
Driver
Assy
16
=
20
Data
Readback
from
the
YIG
Driver
Assy
1.
Install
the
YIG
Driver
assembly
in
the
service
position. Refer
to
the
procedure
\YIG
Driver
Board
Assembly
A9"
in
Chapter
5
of
this
manual.
2.
Using
an
oscilloscope
,
sequentially
probe
pins
5,
6,
8, 14,
15, 16,
17,
18,
19,
20,
21,
22,
24,
and
26
of J4
on the
YIG
Driver
assembly
(A9)
(connect
the
oscilloscope
ground
lead
to
A3TP4
and
set the
timebase to
10

s/division).
Preset
the
instrument
while
probing
each
pin. If
TTL level
activity is
not seen
on
one
or
more
of
these
pins
,
continue
with
the
next
step
.
If TTL
level activity
is seen
on
all
pins
,
replace
the
YIG
Driver
Assembly
.
3.
Sequentially
probe pins
5, 6,
8, 14,
15,
16,
17,
18,
19,
20,
21,
22,
24,
and
26
of
J2
on
the
microprocessor assembly
(A3).
Preset
the
instrument
while
probing
each
pin.
If
activity
is
not seen
on
one
or
more
of
these
pins
,
replace
the
microprocessor
assembly
.
If
activity
is
seen on
all pins
, replace
the
data
cable
(W9).
ABUS Errors
Error Group Description
17 = 1 YIG Driver ABUS: +42 V
17 = 2 YIG Driver ABUS: Digital Gnd
1. Install the YIG Driver assembly in the service position. Refer to the procedure \YIG Driver
Board Assembly A9" in Chapter 5 of this manual.
2. Preset the synthesizer.
3. Measure the voltage at TP6 on the microprocessor assembly (A3) with a voltmeter (connect
the voltmeter ground lead to A3TP4). If the voltage is between 0 to 5 volts, continue with
the next step. If the voltage is a negative voltage, continue with step 7.
1-20 Troubleshooting

Agilent Technologies HP 83711B Specifications

General

Brand	Agilent Technologies
Model	HP 83711B
Category	Test Equipment
Language	English