Spirent DLS 400E3, Руководство по эксплуатации

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DLS 400E3 Operating Manual
Spirent Communications - Page 4-1
7104000537 03/04 -2
4. COMMON COMMAND SET FOR REMOTE CONTROL
4.1 Generic IEEE 488 & RS-232 Controls
The DLS 400E3 is controlled via IEEE 488 (also known as the GPIB or HPIB bus), or the RS-232 (serial)
interface, allowing the integration of the simulator into a larger test system.
The system remote control is designed with several standards in mind:
• The GPIB physical interface follows IEEE 488.1. The functions implemented are outlined in the “IEEE
488 INTERFACE” Section.
• The Common Commands follow IEEE 488.2.
• The Device Dependent Commands (see Chapter 6 "DEVICE SPECIFIC COMMANDS FOR REMOTE
CONTROL") are based upon the Standard Commands for Programmable Interfaces (SCPI).
• The serial port physical interface follows the EIA RS-232 standard.
The IEEE 488 and the serial interfaces are always enabled and either can be used. The host system directs its
output to the last interface from which it received data. Both interfaces use the same command set and pro-
duce the same results.
Section 4.2 "IEEE 488 Interface" and Section 4.3 "RS-232 Serial Interface" describe features specific to one
particular interface, and the rest of this section describes the commands that are common to both interfaces.
4.2 IEEE 488 Interface
This Section contains information specific to the IEEE 488 interface. Section 4.3 "RS-232 Serial Interface"
contains the information specific to the RS-232 interface.
4.2.1 IEEE 488.1 Interface functions supported
The IEEE 488.1 Interface functions supported by the DLS 400E3 are as follows:
SH1 Source handshake - full capability
AH1 Acceptor handshake - full capability
T5 Basic talker - serial poll, untalk on MLA
L3 Basic listener - unlisten on MTA
SR1 Service request - full
DC1 Device clear - full
C4 Respond to SRQ
E1 Open Collector drivers
RL1 Remote Local - full
These represent the minimum required to implement the IEEE 488.2 standard.
4.2.2 The Service Request (SRQ) Line
The SRQ line is raised when the simulator is requesting service. Here are some examples of services that
could raise SRQ:
•a message is available in the output buffer