For example, :TRIGger:VIDeo:SOURce CHANnel2 /*Set trigger source to CH2*/ :TRIGger:VIDeo:SOURce? /*The query returns CHAN2*/ :TRIGger:VIDeo:POLarity For example : TRIGger:VIDeo:POLarity POSitive /*Set the video polarity to positive polarity*/ : TRIGger:VIDeo:POLarity? /*Query returns POS*/ :TRIGger:VIDeo:MODE For example, :TRIGger:VIDeo:MODE ODDField /*Set the synchronization type to an odd field*/ :TRIGger:VIDeo:MODE? /*The query returns ODDF*/ :TRIGger:VIDeo:LINE 74 / 136 Discrete {CHANnel1|CHANnel2|CHANnel3| CHANnel4} CHANnel1 Return format The query returns CHAN1, CHAN2, CHAN3, or CHAN4. Command format :TRIGger:VIDeo:POLarity :TRIGger:VIDeo:POLarity?
Function description Select or query the video polarity when the video is triggered. Parameter Name Type Range Default Discrete {POSitive|NEGative} POSitive Return format The query returns POS or NEG. Command format :TRIGger:VIDeo:MODE :TRIGger:VIDeo:MODE? Function description Set or query the synchronization type when the video is triggered. Parameter Name Type Range Default Discrete {ODDField|EVENfield|LINE|ALINes} ALINes Description ODDField: Trigger on the rising edge of the first sawtooth wave in the odd field. EVENfield: Trigger on the first rising edge of the sawtooth wave in the even field. LINE:
For NTSC and PAL / SECAM video standards, trigger on a specified line in the odd or even field. ALINes: trigger on all horizontal sync pulses. Return format The query returns ODDF, EVEN, LINE, or ALIN. Command format :TRIGger:VIDeo:LINE :TRIGger:VIDeo:LINE? Function description Sets or queries the line number when the synchronization type is the specified line when the video is triggered. Parameter Name Type Range Default Integer Refer to description 1 Description 1 至525（NTSC） 1 至625（PAL/SECAM）