Agilent Technologies Infiniium 8000A Programmer's Reference Manual page 335

Query
Returned Format
Example
:EXTERNAL:PROBe:EXTernal:GAIN?
The :EXTernal:PROBe:EXTernal:GAIN? query returns the probe external gain
setting for the external trigger.
[:EXTernal:PROBe:EXTernal:GAIN]
This example places the external gain value of the probe on the external trigger
in the variable, Gain, then prints the contents of the variable to the computer's
screen.
10 OUTPUT 707;":EXTERNAL:PROBE:EXTERNAL ON"
20 OUTPUT 707;":EXTERNAL:PROBE:EXTERNAL:GAIN?"
30 ENTER 707;Gain
40 PRINT Gain
50 END
External Trigger Commands
PROBe:EXTernal:GAIN
<gain_factor>
<NL>
15-13