HP 8340b User Manual

Front Panel
Overall
Assembly-Level
Troubleshooting
INSTRUMENT PRESET
1.
Disconnect
all
cables
from
the
synthesizer.
2.
To
cycle
the
power,
turn
the
power
switch to
standby, wait several minutes
for
all
power
supply
capacitors
to
discharge,
and
turn
the
power
switch to
on.
3.
Press
[INSTR
PRESET]
and
compare
the
instrument configuration
with the
following:
Start
Frequency:
10MHz
Stop
Frequency:
26.5
GHz
(HP
8340B)
20.0
GHz
(HP 8341
B)
Power
Level:
0.0
dBm
(factory set value)
Can be changed
with
calibration
constant
56.
Sweep
Time:
AUTO
(44.15 ms
for
HP
8340B;
33.316
ms
for
HP
8341B;
press
[SWEEP TIME]
to
verify)
Sweep:
CONT
Trigger:
FREE
RUN
RF:
On
Leveling:
INT
INSTR CHECK
LEDs:
Off
Either
or
Both
INSTR CHECK
LEDS
are
On
If
either
or
both
of the
INSTR
CHECK
LEDs
stay
on
after
power
on
or an
instrument
preset,
refer
to
the
overall
instrument
troubleshooting
in
the
service
introduction of
this
manual.
Front Panel
Diagnostic
Mode
Activates
If,
at
power
on,
the
front
panel
goes
into
the
front
panel
diagnostic
mode
(the
same
as
pressing
[SHIFT]
[FREE
RUN]),
suspect
the
main
instrument
processor.
At
power
on,
the
instrument
microprocessor
should
initiate
a
self
test.
One
of
the
first
things the
self
test
does
is
send data
to
the
front
panel
processor.
If
the front
panel
processor
does not receive
the
data from
the
instrument
microprocessor,
it
automatically
goes
into
the diagnostic
mode.
All
Front Panel
LEDs
are
On
If, at
power
on,
all
front
panel
LEDs
are on
(similar
to
holding
[INSTR
PRESET]),
check
the
negative
power
supplies.
The
main instrument
processor
requires
both
the
positive and
negative supplies
(and
will
suspend
instrument
functions
if
one
is
inoperative).
The
front
panel
LEDs
require only
the
positive
supplies.
LED
AND
ANNUNCIATOR
TEST
1.
Turn
the
power
switch to
on.
2
Press
and
hold [INSTR
PRESET].
G-6 Front
Panel
Overall Assembly-Level
Troubleshooting
HP 8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English