HP 3720A - Rear Panel Controls and Connectors

Model 3720A
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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
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