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902 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide

31 :TRIGger Commands

:TRIGger[:EDGE]:COUPling

(see page 1138)

Command Syntax

:TRIGger[:EDGE]:COUPling <coupling>

<coupling> ::= {AC | DC | LFReject}

The :TRIGger[:EDGE]:COUPling command sets the input coupling for the

selected trigger sources. The coupling can be set to AC, DC, or LFReject.

• AC coupling places a high- pass filter (10 Hz for analog channels, and

3.5 Hz for all External trigger inputs) in the trigger path, removing dc

offset voltage from the trigger waveform. Use AC coupling to get a

stable edge trigger when your waveform has a large dc offset.

• LFReject coupling places a 50 KHz high-pass filter in the trigger path.

• DC coupling allows dc and ac signals into the trigger path.

Query Syntax

:TRIGger[:EDGE]:COUPling?

The :TRIGger[:EDGE]:COUPling? query returns the current coupling

selection.

Return Format

<coupling> ::= {AC | DC | LFR}

See Also • "Introduction to :TRIGger Commands" on page 877

• ":TRIGger:MODE" on page 886

• ":TRIGger[:EDGE]:REJect" on page 904

NOTE

The :TRIGger[:EDGE]:COUPling and the :TRIGger[:EDGE]:REJect selections are coupled.

Changing the setting of the :TRIGger[:EDGE]:REJect can change the COUPling setting.

Agilent Technologies InfiniiVision 3000 X-Series Programmer's Guide

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