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Command Syntax

When concatena

ting commands and queries, you must follow these rules:

1. Separate completely different headers by a semicolon and by the beginning

colon on all commands except the ﬁrst o ne. For example, the commands

TRIGger:MODe NORMal and ACQu ire:NUMAVg 8, can be concatenated

into the following single command:

TRIGger:MODe NORMal;:ACQuire:NUMAVg 8

2. If concatenated commands have headers that differ by only the last mnemonic,

you can abbreviate the second command and eliminate the beginning colon.

For example, you can concatenate the commands

ACQuire:MODe AVErage

and ACQuire:NUMAVg 8 into a single command:

ACQuire:MODe AVErage; NUMAVg 8

The longer version works equally well:

ACQuire:MODe AVErage;:ACQuire:NUMAVg 8

3. Never precede a star (*) command with a colon:

ACQuire:STATE 1;*OPC

Any commands that follow will be processed as if the star command was

not there so the commands,

ACQuire:MODe ENVelope;*OPC;NUMAVg 8

will set the acquisition mode to envelope and set the number of acquisitions

for averaging to 8.

4. When you concatenate queries, the responses to all the queries are

concatenated into a single response mes sage.

5. Set commands and queries may be concatenated in the same message. F or

example,

ACQuire:MODe SAMple;NUMAVg?;STATE?

is a valid message that sets the acquisition mode to sample. The message then

queries the number of acquisitions for averaging and the acquisition state.

Concatenated commands and queries are executed in the or der received.

Here are some invalid concatenations:

HORizontal:SCAle 400E-9;ACQuire:NUM AVg 8 (no colon before

ACQuire)

DISPlay:GRAticule FULL;:*TRG (colon before a star (*) command)

MATH:HORizontal:SCAle 1.0e-1;HORizo ntal:POSition 5.0el

(levels of the mnemonics are different; either remove the second use of

HORizontal: or place :MATH in front of HORizon tal:POSition)

Terminating

This documentation uses <EOM> (End of Message) to represent a message

terminator.

MSO2000B, DPO2000B, MSO2000 and DPO2000 Series Oscilloscopes Programmer Manual 2-5

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