GPIB General
Information
Interconnecting Cables
Figure C-2 shows the swept signal generator rear-panel GPIB
connector and suitable cables, and describ es the pro cedures and
limitations for interconnecting instruments. Cable length restrictions,
also described in Figure C-2, must b e observed.
Instrument Addresses
Each instrument in a GPIB network must have a unique address,
ranging in value from 00-30 (decimal). The default address for the
swept signal generator is 19, but this can be changed using the
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My Adrs
softkey or rear panel switch as describ ed in the reference
chapter (Chapter 2) under the \8360 Adrs" entry (the examples in
this section use 19 as the address for the swept signal generator).
Other instruments use a variety of pro cedures for setting the address,
as describ ed in their op erating manuals, but typically either a rear
panel switch or a front panel co de is used.
GPIB Instrument
Nomenclature
A GPIB instrument is categorized as a \listener," \talker," or
\controller," depending on its current function in the network.
Listener
A listener is a device capable of receiving data or commands from
other instruments. Anynumber of instruments in the GPIB network
can be listeners simultaneously.
Talker
A talker is a device capable of transmitting data or commands to
other instruments. Toavoid confusion, a GPIB system allows only
one device at a time to b e an active talker.
Controller
A controller is an instrument, typically a computer, capable of
managing the various GPIB activities. Only one device at a time can
be an active controller.
Programming the Swept
Signal Generator
The swept signal generator can be controlled entirely by a computer
(although the line POWER switchmust b e op erated manually).
Several functions are p ossible only by computer (remote) control.
Computer programming pro cedures for the swept signal generator
involve selecting a GPIB command statement, then adding
the specic swept signal generator (SCPI, Analyzer, or CIIL)
programming codes to that statementtoachieve the desired
operating conditions. The programming co des can b e categorized
into two groups: Those that mimic front panel keystrokes; and those
that are unique, and have no front panel equivalent.
1-56 Getting Started Programming
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