178 Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference
3Commands by Subsystem
:EXTernal:PROTection
(see page 530)
Command Syntax :EXTernal:PROTection[:CLEar]
When the external trigger input impedance is set to 50Ω, the external
trigger input is protected against overvoltage. When an overvoltage
condition is sensed, the input impedance for the external trigger is
automatically changed to 1 MΩ. The :EXTernal:PROTection[:CLEar]
command is used to clear (reset) the overload protection. It allows the
external trigger to be used again in 50Ω mode after the signal that caused
the overload has been removed from the external trigger input. Reset the
external trigger input impedance to 50Ω (see ":EXTernal:IMPedance" on
page 174) after clearing the overvoltage protection.
Query Syntax :EXTernal:PROTection?
The :EXTernal:PROTection query returns the state of the input protection
for external trigger. If the external trigger input has experienced an
overload, TRIP (tripped) will be returned; otherwise NORM (normal) is
returned.
Return Format {NORM | TRIP}<NL>
See Also •"Introduction to :EXTernal Trigger Commands" on page 171
•":EXTernal:IMPedance" on page 174
•":EXTernal:PROBe" on page 175