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1693 RLC Digibridge
3.11 Data Output and Programming
via IEEE 488 and RS-232 Interface
3.11.1 Overview
The optional Digibridge IEEE-488.2 interface board
provides IEEE-488.2 (GPIB) and RS 232 Serial inter-
faces to the Digibridge 1689/1693 series instruments
via 24-pin GPIB and 9-pin male serial connectors. The
interface can be used to connect directly to a controller
or to a bus comprising of multiple instruments and
a controller. All instruments on the IEEE-488.2 bus
must meet the IEEE Standard 488.2-1987 (Standard
Digital Interface for Programmable Instrumentation).
The IEEE-488 interface board supports the IEEE-
488.2 and SCPI interface standard and communica-
tion protocol. The physical, electrical, signal and
protocol standards of the IEEE 488.1-1987, IEEE
488.2-1987 and SCPI-1999 standards are supported.
The following IEEE-488 functions are implemented:
AH1 Acceptor Handshake (Listener)
SH1 Source Handshake (Talker)
T5
Talker with normal and talk-only modes (for
systems without a controller), switch selectable on
the rear panel.
L4
Listener.
SR1 Service Request (to request service when
measurement is complete and the instrument is not
addressed to talk).
RL2 Remote/Local (no local lockout, no return-
to-local switch).
PP0 No Parallel Poll.
DC1 Device Clear.
DT1 Device Trigger (to start measurement).
C0
No controller functions.
E2
Electrical Interface.
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3.11.2 Configuration
The Digibridge IEEE-488.2 interface board has two
switches for setting operating configuration, SW1,
the Talk-Listen / Talk-Only toggle switch, and S2,
the GPIB Address selection DIP switch.
3.11.3 Talk-Listen / Talk-Only Toggle
Switch
The SW1 red toggle switch is used to select between
the Talk-Listen and the Talk-Only operating modes.
If no controller (or PC) will be used to control the
Digibridge via either the IEEE 488 or RS 232 inter-
faces, then the SW1 toggle switch should be set to
Talk-Only. For controlling the Digibridge externally
via either interface, the SW1 toggle switch should be
set to Talk-Listen.
Operation
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