R&S ESR Series User Manual page 595

Emi test receiver

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Clear command processing

and input buffer

1) The first command in a command line that immediately follows a <PROGRAM MESSAGE TERMINA-

TOR> clears the output buffer.

11.1.7 General Programming Recommendations

Initial instrument status before changing settings

Manual operation is designed for maximum possible operating convenience. In con-

trast, the priority of remote control is the "predictability" of the instrument status. Thus,

when a command attempts to define incompatible settings, the command is ignored

and the instrument status remains unchanged, i.e. other settings are not automatically

adapted. Therefore, control programs should always define an initial instrument status

(e.g. using the *RST command) and then implement the required settings.

Command sequence

As a general rule, send commands and queries in different program messages. Other-

wise, the result of the query may vary depending on which operation is performed first

(see also Preventing Overlapping Execution).

Reacting to malfunctions

The service request is the only possibility for the instrument to become active on its

own. Each controller program should instruct the instrument to initiate a service

request in case of malfunction. The program should react appropriately to the service

Error queues

The error queue should be queried after every service request in the controller pro-

gram as the entries describe the cause of an error more precisely than the status regis-

ters. Especially in the test phase of a controller program the error queue should be

queried regularly since faulty commands from the controller to the instrument are

recorded there as well.

11.1.8 The IECWIN Tool

The R&S ESR is delivered with IECWIN installed, an auxiliary tool provided free of

charge by R&S. IECWIN is a program to send SCPI commands to a measuring instru-

ment either interactively or from a command script.

User Manual 1175.7068.02 ─ 12

Switching on supply

Power-On-Status-

Remote Control

Remote Control - Basics

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