Rigol DS1204B Dokumentacja Pobierz pdf (Strona 72)

RIGOL

Programming Guide for DS1000B Series

2-64

3. Video Trigger

In video trigger, the standard video signal (NTSC, PAL/SECAM) is triggered in

field or line. The trigger coupling mode is DC.

(1) :TRIGger:VIDEO:MODE

Command Format:

:TRIGger:VIDEO:MODE□<mode>

Function:

The command sets the trigger sync mode as ODDFIELD, EVENFIELD, LINE

or ALLLINES.

Query Format:

:TRIGger:VIDEO:MODE?

Return Format:

The query returns ODD FIELD ro EVEN FIELD, LINE, ALL LINES.

Example:

:TRIGger:VIDEO:MODE□EVENFIELD

Set the trigger sync mode as even field.

:TRIGger:VIDEO:MODE? Return EVEN FIELD.

(2) :TRIGger:VIDEO:POLarity

Command Format:

:TRIGger:VIDEO:POLarity□{ POSitive | NEGative }

Function:

The command sets the video polarity as POSitive (it is applicable for the

video signal that the black level is low) or NEGative (the black level is high).

Query Format:

:TRIGger:VIDEO:POLarity?

Return Format:

The query returns POSITIVE or NEGATIVE.

Example:

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 131 132

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Rigol DS1204B Dokumentacja Strona 72