Interface Connections; Control Interface - HP 3457A Service Manual

Installation
3457A
Figure 2-4. Typical HP-IB Interface Connection
2-1 8 INTERFACE CONNECTIONS
2-1 9. Control Interface
2-20. The HP Model
3457A
is compatible with the Hewlett-Pachard Interface Bus (HP-IB). Connection is
made using an HP-IB interface cable to connect the controller to the appropriate connector o n the rear of
the HP 3457A. A typical HP-IB interface system is shown in Figure 2-4. The system shown uses three HP-TB
interface cables t o connect the instruments in the system. Each interface connector is both a male and
female connector to permit connection to an instrument and another interface cable. As many as 15 in-
struments can be connected by the same interface bus. However, the r n a x i m ~ ~ n ~ length of cable used to
connect a group of instruments should not exceed the number of instruments times 2 meters (6.56 ft.), o r a
maxinlum of 20 meters (65.6 ft.), whichever is less. Refer to Figure 2-5 for a pictorial view of the HP-IB
connector and its pin designations.
2-21. HP-IB ADDRESS SELECTION
2-22. The HP-IB address is progranlmed from the front panel or over the interface bus. The address is set t o
decimal
"22"
at the factory. This corresponds to an
ASCII
listen address of
"6" and talk address of "V". The
HP 3457A display momentarily shows the current address code whenever the i n s t r ~ ~ m e n t is turned o n or
reset.
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NOTE
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