Video Triggering - Fluke CombiScope PM3370B User Manual

USING THE COMBISCOPE INSTRUMENTS
LF-REJECT (30 KHz cutoff frequency):
LF -REJECT
0dB
-3dB
30kHz FULL BANDWIDTH
Figure 3.6 LF Reject
PROGRAM EXAMPLE:
TRIGger:FILTer:LPASs:STATe ON
TRIGger:FILTer:LPASs:FREQuency 3E+4
HF-REJECT (30 KHz cutoff frequency)
HF-REJECT
0dB
-3dB
30kHz FULL BANDWIDTH
Figure 3.7 HF Reject
PROGRAM EXAMPLE:
***
*** Select HF-reject on MTB triggering.
TRIGger:FILTer:HPASs:STATe ON
3.4.1.2

Video triggering

TV video triggering enables stable triggering on video frames and lines from
various TV standards without adjusting the trigger level, and can be selected by
programming TRIGger:TYPE VIDeo.
Video triggering can be programmed on signals with a positive or negative signal
polarity using the TRIGger:VIDeo:SSIGnal command.
LF reject (HF passed) causes the signal to be
passed from the cutoff frequency (30 KHz) to the
full bandwidth frequency (60/100/200 MHz).
FREQ.
ST7428
HF reject (LF passed) causes the signal to be
passed from 0 Hz to the cutoff frequency
(30 KHz).
FREQ.
ST7429
Sets Low-Pass filter on + cutoff frequency = 0 Hz
(DC coupling).
Sets cutoff frequency = 30 KHz;
this selects MTB trigger LF-reject.
Sets High-Pass filter on;
this selects MTB trigger HF-reject.
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