HP 8340b User Manual

J9
-
Internal/JIO
-
External
Use
these
connectors,
and
the
INT/EXT
switch,
to select
either
the
internal 10MHz
crystal oscillator
frequency
standard,
or an
external
frequency
standard
as
the
instrument's
master
time
base.
How
to
Select the
Internal
Standard:
1.
Place
the
switch in the
INT
position.
2.
Connect
a
jumper
cable between
the
INT
and
EXT BNC
connectors.
How to Select
an
External
Standard:
1.
Check
that
the
source
to
be
used
is
10
MHz
±100Hz.
2.
Check that the
source
to be
used provides
1
to +10
dBm.
3.
Place
the
switch
in
the
EXT
position.
4.
Connect
the
external
source
to
the
EXT
BNC
connector.
When
the
switch
is in
the
EXT
position,
the internal
standard
is
turned off,
and
the
amber
EXT REF
annunciator
comes on
above
the
front
panel
ENTRY
DISPLAY.
J11
—
External
Trigger
Input
Use
this
input
(2 kf2
nominal
impedance)
to trigger
the
start
of
sweep.
A
trigger signal
must
be
at least
2V
(10V
maximum),
and
wider
than
0.5 microseconds.
J12
-
Mute
Output
This
output
is
an
active
low
TTL
signal
used
to
pause
external
X-Y recorders
or
instruments
when
the
synthesizer
crosses
a
frequency-band switchpoint.
For
more
information
on
using
an
X-Y
recorder,
refer to
the
HP
8340B/8341B
Operating
Manual.
J13
-
Penlift
Output
Penlift
disables
an X-Y recorder
during
sweep retrace.
If
you press
[SHIFT]
[LINE],
penlift
also
disables
the
recorder
during
band
switchpoints.
Penlift
provides
a
current
path to
ground
for
the
recorder's
pen
solenoid.
A
zener
diode
protects
the
penlift
circuit
from
excessive
recorder
solenoid
voltage,
and
a
diode
protects
it
from negative
voltages
on
the
input.
J14
—
Negative
Blanking
This
output
provides
a
negative rectangular pulse (approximately
—5V into
2k Q)
during
sweep
retrace
and band
switchpoints.
J15
—
Z-Axis
Blanking
/
Markers
This
output
supplies
a
positive
rectangular
pulse
(approximately +5V
into
2k
Q)
during
sweep
retrace
and band
switchpoints.
When the
RF
output
is at
a
marker
frequency,
this
output supplies
a
—5V
pulse.
HP
8340B/41B
Rear
Panel
Theory
of
Operation
G
.43

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English