Agilent Technologies Infiniium 8000A Programmer's Reference Manual page 324

External Trigger Commands
The EXTernal commands only apply to the two channel Infiniium
Oscilloscope.
The EXTernal trigger subsystem commands control the vertical, Y axis
functions of the oscilloscope's external trigger. These EXTernal
commands and queries are implemented in the Infiniium Oscilloscopes:
• BWLimit
• INPut
• PROBe
• PROBe:ATTenuation (only for the 1154A probe)
• PROBe:EADapter (only for the 1153A, 1154A, and 1159A probes)
• PROBe:ECoupling (only for the 1153A, 1154A and 1159A probes)
• PROBe:EXTernal
• PROBe:EXTernal:GAIN
• PROBe:EXTernal:UNITs
• PROBe:GAIN (only for the 1154A probe)
• PROBe:ID?
• PROBe:SKEW
• RANGe
• UNITs
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