1250 Frequency Response Analyzer The RS423 and GPIB Ports. Remote Control
AMK/1250/4 13-3
13.1 INTRODUCTION
Remote control of the 1250 can be achieved via either the General Purpose Interface
Bus (GPIB) Interface, or the RS423 Serial Interface, both of which are fitted as standard.
The 1250 can also be used in a system containing both GPIB and RS423 compatible
devices.
The user will require the following documents in order to obtain a full understanding of
remote control of the 1250:
1. The external device's Operating Manual.
2. The 1250 Operating Manual.
3. The relevant standard, as described below:
c. GPIB. The GPIB Interface conforms to the IEEE 488-1978 standard. The complete
standard is published by the IEEE under the title: "IEEE Standard Digital Interface for
Programmable Instrumentation". A useful introduction to the theory of the GPIB is given
in the Solartron monograph: "Plus Bus - the Solartron GPIB".
d. RS423. The RS423 Serial Interface is also compatible with RS232. Both these are
Electronic Industries Association (EIA) standards, published by the Engineering
Department under the titles:
EIA Standard RS232C. Interface Between Data Terminal Equipment and Data
Communications Equipment Employing Serial Binary Data Interchange. August 1969.
EIA Standard RS423. Electrical Characteristics of Unbalanced Voltage Digital Interface
Circuits. April 1975.
13.1.1 GPIB CAPABILITY CODE
The GPIB Interface in the 1250 conforms to the following sub-functions within the
standard, as listed on the rear panel:
SH1 Source Handshake
AH1 Acceptor Handshake
T5 Basic Talker, Serial Poll, Talk Only Selectable, unaddressed if MLA (My
Listener Address)
TE0 No Extended Talker capability
L4 Basic Listener, no Listen Only mode, unaddressed if MTA (My Talker Address)
LE0 No Extended Listener capability
SR1 Complete Service Request capability
RL1 Complete Remote/Local capability, with Local Lock-Out
PP2 Parallel Poll with Local Configuration
DC1 Complete Device Clear Capability, including Selective Device Clear
C0 No Controller capability
DT0 No Device Trigger capability
E1 Open Collector Drivers
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