HP 8340b User Manual

INSTRUMENT
PRESET CONDITIONS
(1)
Press
[SHIFT] [INSTR
PRESET]
and
check that the
following
settings
exist.
If
any
instrument
condi¬
tion
is
not
as shown
below,
the
instrument
requires
service.
NOTE:
Press
[SHIFT] [INSTR PRESET]
to
eliminate
any
frequency
multiplication
factor
locked
into
the
instrument
by
earlier
use
of the
SHIFT ALT
function,
and
preset
the
instrument (see
section
three
of
this
manual set for
details.)
POWER
dBm display
=
0.0
Factory
setting,
determined
by
cal
constant #56.
A
different
power
level
can
be
set
by
changing calibration
constant
#56
(see
Calibration
Constant).
FREQUENCY
MHz display
=
10.000000
START
annunciator
lit
FREQUENCY
MHz
display
=
26.500000
(HP
8340B)
OR
20.000000
(HP
8341 B)
STOP
annunciator
lit.
Factory
setting.
Calibration
Constant
#54
should
always
be
set
to
a
value
of
26500
for
the
HP
8340B,
or
to
a
value
of
20000
for
the
HP
8341
B.
If
the
stop
frequency
is
wrong
at instrument
preset,
check
this
calibration
constant.
ENTRY DISPLAY
=
Blank
(off)
SWEEP
block
=
Green
LED
flashing
If
the
green
LED is
not
flashing,
the
instrument
is
not
sweeping
and
requires
service.
CONT LED
on
FREE
RUN LED
on
FREQUENCY MARKER
block
=
All
LEDs
off
INSTRUMENT STATE
block
=
All
LEDs
off
MODULATION
block
=
All
LEDs
off
ENTRY
block
=
All
LEDs off
LEVELING
block
=
INT
LED
on
RF
OUTPUT
block
=
RF LED
on
The
RF
output
should
be
a
swept signal,
leveled at
0
dBm.
This
signal should start at
10
MHz and
stop
at the
maximum
frequency
of
the
instrument.
EXT REF
annunciator
=
off.
If
the
rear
panel
INT
or
EXT REFERENCE
switch
Is
in
the
EXT
position,
the
EXT REF
annunciator
above
the
ENTRY DISPLAY
will
be
on.
A-36 Assembly-Level
Service
Overall
Instrument
Troubleshooting
HP 8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English