Exfo FLS-2200 Broadband Source Manuel d'utilisateur télécharger pdf (Page 55)

Using Your Broadband Source in an Automated Test Environment

Broadband Source 47

SCPI Command Structure

There are also several conventions regarding command syntax:

 Spelling errors will cancel the command or query.

 Commands and queries are not case-sensitive. You can type your

program messages using either lower-case or upper-case letters.

 The command or query can be written using only the three- or

four-letter shortcuts, only full words, or a combination of both.

The example below shows the long and the short forms of a same

query.

 For readability reasons, you can use extra spaces in your program

messages but they won’t be taken into account. For more information,

see Message Management on page 35.

;

 Mandatory to separate the different commands of a program

message when more than one command is sent at a time. In this

case, it is called <PROGRAM MESSAGE UNIT SEPARATOR>.

 Also used to separate responses when multiple queries were sent in

a single program message. In this case, it is called <RESPONSE

MESSAGE UNIT SEPARATOR>.

 Mandatory to separate parameters in a command or a query. In this

case, it is called <PROGRAM DATA SEPARATOR>.

 Also used to separate the various responses from a query. In this

case, it is called <RESPONSE DATA SEPARATOR>.

Item Meaning

:SYSTem:ERRor?

:SYST:ERR?

:syst:err?

Long form

Short form (small words

represented by the capital letters

of the long form)

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Exfo FLS-2200 Broadband Source Manuel d'utilisateur Page 55