1 Introduction
This Manual contains information about the CMT Network Analyzer remote control
and its data communication, carried out by means of user program through a
computer network.
This manual describes the analyzer command system and the network protocols
used to deliver the commands. The commands sent to and the responses read
from the analyzer are text messages conforming to the SCPI (Standard Commands
for Programmable Instruments) specification. The text messages are delivered
over computer networks using HiSLIP or TCP/IP Socket network protocols.
HiSLIP (High-Speed LAN Instrument Protocol) — a network protocol intended for
remote control of measuring and testing equipment, is based on the TCP/IP
network protocol. HiSLIP is developed by the consortium IVI Foundation as the
successor to GPIB
1
and VXI-11
2
protocols. The user program, as a rule, relies on the
implementation of the HiSLIP protocol in the VISA library.
TCP/IP Socket is a general-purpose network protocol. The user program can
connect to the analyzer using the TCP/IP Socket protocol both directly and
through the VISA library.
VISA (Virtual Instrument Software Architecture) is a widely used software input-
output interface in the field of testing and measurement for controlling devices
from a personal computer. It is a library of functions for C / C ++, C #, Visual Basic,
MATLAB, LabVIEW and others. The VISA library unifies access to all measuring
instruments, regardless of the protocol and equipment used. The VISA library is
installed on the client side, that is, on the computer where the user program is
executed. The VISA library is available on the websites of many companies for free
download. There are versions for Linux, Mac OS, Windows.
Section 2 of the manual describes how to establish a network connection between
the user program and the analyzer using the HiSLIP or TCP/IP Socket protocol. It
shows the differences between the HiSLIP and TCP/IP Socket protocols in terms of
writing user programs.
Sections 3 and 4 of the manual describe general information about SCPI and the
analyzer command system, respectively.
Section 5 of the manual focuses on recommendations about programming in some
specific situations.
Appendixies 1 through 3 contain information about the IEE488.2 Status Reporting
System, Error Codes, and Sample Programs.
1
GPIB is a bus interface that connects measurement and test equipmet to a computer.
2
VXI-11 is a network protocol for remote control of measurement and test equipmet.
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