Using A Semicolon; Using Whitespace - Keysight N1911A Programming Manual

Using a Semicolon (;)

Use a semicolon to separate two commands within the same command string.
The semicolon does not change the present path specified. For example, the
following two statements are equivalent. Note that in the first statement the first
colon is optional but the third is compulsory.
:DISP:FORM DIG;:DISP:RES 2
:DISP:FORM DIG;RES 2
Using a Comma (,)
If a command requires more than one parameter, you must separate adjacent
parameters using a comma.

Using Whitespace

You must use whitespace characters, [tab], or [space] to separate a parameter
from a command keyword. Whitespace characters are generally ignored only in
parameter lists.
Using "?" Commands
The bus controller may send commands at any time, but a SCPI instrument may
only send responses when specifically instructed to do so. Only query commands
(commands that end with a "?") instruct the instrument to send a response
message. Queries return either measured values or internal instrument settings.
If you send two query commands without reading the response from the first,
NOTE
then attempt to read the second response, you may receive some data from the
first response followed by the complete second response. To avoid this, do not
send a query command without reading the response. When you cannot avoid
this situation, send a device clear before sending the second query command.
N1911A/1912A P-Series Power Meters Programming Guide
Power Meter Remote Operation 1
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