Model
3720A
c
1
1.
POWER MODULE:
contains ac line socket, fuse,
and voltage selector switch.
24
5
3
6
7
4.
AC
Line.
11 51230V.
k
10%.
48
to 65Hz. 250VA.
5.
Fuse.
115V -2.5AT, 230V -1.25AT.
Clipin fuse. Cannot be changed without first
re-
moving power cable.
Selector. Lever switch, 115V
or
230V line voltage
selector. Cannot
be
changed without
first
removing
power cable.
2.
EXTERNAL INTERFACE:
50-contact connector.
Duplicates 3721A Data Interface rear panel connector.
3. 3720A13721A CONNECTOR:
50-contact connector.
Input
socket for data from 3721A.
6.
X-RECORDER:
BNC connector. Output to horizontal
axis of
X-Y
Recorder.
Y-RECORDER:
BNC connector. Output to vertical
axis of
X-Y
Recorder.
PEN LIFT:
BNC connector. Provides control signal for
pen of an
X-Y
Recorder with remote pen control
facility.
VALID DATA:
BNC connector. Provides
p
signal to
indicate that valid data is present at
X
and
Y
Re-
corder output connectors.
NOTE:
-
denotes alternating current (ad.
Figure
1-3
Rear panel controls and connectors
1-4
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