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Operation
Model
8672A
Table
3-2.
Rear Panel Features
0
HP-18
CONNECTOR:
connects the Synthesizer to the
Hewlett-Packard Interface
Bus
for remote operation.
When
in
remote operation, the
STATUS
Block
(see
Figure 3-1)
A
REMOTE
annunciator illuminates.
0
100 MHz OUT (A3J7): OdBm (nominal)
into 50 ohms,
can be used
as
an
external
timebase and
for
trouble¬
shooting.
0
RF
OUT (A3J6): only for
Options
004
and
005,
50 ohm type
N
output
connector
(see
Table 1-1 for
Option information).
Q
10
MHz OUT (A3J8):
0
dBm (nominal) into 50 ohms,
can
be
used
as
an
external
timebase and
for trouble¬
shooting.
Q
FREQ STANOARO
Output
(A3J9): 10.000 MHz
into 50 ohms
at
+7 dBm (nominal)
from
the internal
frequency standard except when
INT/EXT
switch
^ft
is
in the
EXT
position.
0
FREQ STANOARO
INT/EXT
switch: normally left
in the
INT
position. Removes power
from internal
frequency standard when in the
EXT
position.
^h
Jumper
(A3W3):
normally connects the Internal
Fre¬
quency Standard Output (A3J9) to the External
Fre¬
quency Standard
Input (A3J10).
0
FREQ.
STANOARO
Input (A3J10): normally
con¬
nected by
A3W3
to A3J9. Also
used
to connect
an
external frequency standard
of
5
or 10
MHz
at
0
dBm
to the Synthesizer.
A
Line Power Module: permits operation from
100,
120, 220,
or
240 Vac. The number
visible in
the
window
displays the
nominal line (Mains)
voltage
for
which
the Synthesizer
is
set
(see
Figure 2-1).
The
pro¬
tective grounding conductor connects to the Synthe-
syzer through this module. The line power fuse
(A3F1)
is
part
of
this module and
is
the only part to
be changed by the
operator.
Figure 3-2. Rear
Panel Connectors, Switches, and
Displays
3-4
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