Exfo PM-1100 Optical Power Meter Manual de usuario descargar pdf (Pagina 56)

Controlling Your Optical Power Meter Remotely

46 PM-1100

Command Structure

An SRQ is forced when a bit is set in the STB and at the same time the

corresponding SRE bit is set. When the SRQ is generated, the RQS bit is set

to 1 and remains set until read by a serial poll. Once the RQS is read, it

returns to 0.

Command Structure

The GPIB and RS-232 commands follow the guidelines determined by the

Standard Commands for Programmable Interface (SCPI) consortium. For

example, the command syntax

FORM:READ[:DATA]<space><digits>

is used to change the measurement display resolution (number of digits

after the decimal point) of a Optical Power Meter.

In this particular example,

³ FORM identifies that the command is a part of the SCPI FORMat subset

of commands;

³ READ and DATA are keywords that define the function of the

command;

³ [ ] indicates that a keyword or a parameter is optional;

³ <space> indicates that a space is required; and

³ <digits> is the command parameter.

For example, the typical FORM:READ:DATA 1 command instructs the

PM-1100 to display a power measurement with 1 digit after the decimal

point.

Note: It is recommended to retrieve the response immediately after each query.

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Exfo PM-1100 Optical Power Meter Manual de usuario Pagina 56