Bnc 7000 Series Programmer Manual Bedienungsanleitung PDF herunterladen (Seite 33)

A trigger signal comprises both positive and negative signal transitions (states), which are also called

high and low periods. You can configure the SERIES 7000 to trigger on either state of the trigger

signal. It is common to have multiple triggers, also referred to as trigger occurrences or events, occur

when the instrument requires only a single trigger. In this situation, the SERIES 7000 recognizes the

first trigger and ignores the rest.

There are four parts to configuring the trigger:

1. Choosing the trigger type which controls the waveform’s transmission.

• NORMal : trigger edge initiates/stops sweeps

• GATE : trigger level starts/stops sweep

2. Setting the waveform’s response to triggers:

— CONTinuous : reapeatedly accepts trigger events

— SINGle : uses only one trigger event

3. Selecting the trigger source which determines how the SERIES 7000 receives its trigger signal,

internally or externally. The GATE choice requires an external trigger.

4. Setting the trigger polarity when using an external source

Command

Parameters

Unit

(default)

[SOURce]:TRIGger[:SEQuence]:TYPE

NORMal | GATE | POINT

[SOURce]:TRIGger[:SEQuence]:TYPE:GATE

LOW|HIGH

HIGH

[SOURce]:TRIGger[:SEQuence]:SOURce

IMMediate | EXT | BUS

IMM

[SOURce]:TRIGger[SEQuence]:SLOPe

POSitive|NEGative

POS

:TRIGger:TYPE

[SOURce]:TRIGger:TYPE NORMal | GATE | POINT

[SOURce]:TRIGger:TYPE?

This command sets the trigger type

The following list describes the trigger type command choices:

NORMal Upon triggering, the waveform sequence plays according to settlings defined

by :INITiate:CONTinuous (only once or repeatedly)

GATE An external trigger signal repeatedly starts and stops the waveform’s

playback. The time duration for playback depends on the duty period of the

trigger signal and the gate polarity selection. The waveform plays during the

inactive state and stops during the active polarity selection state. The active

Berkeley Nucleonics Corporation 2955 Kerner Blvd., San Rafael, CA 94901

Phone: 415-453-9955, Fax: 415-453-9956, Email: [email protected]om, Web: www.berkeleynucleonics.com

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