Trigger
R&S
®
RTC1000
56
User Manual 1335.7352.02 ─ 02
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HDTV 720p Progressive
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HDTV 1080p Progressive
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HDTV 1080i Interlaced
SIGNAL
Selects the polarity of the sync pulse (positive or negative). With positive video modu-
lation, when the highest brightness is represented by the maximum signal voltage in
the image ), the synchronization pulses are negative. If the modulation is negative,
sync pulses are positive. The edges of the sync pulses are used for triggering, there-
fore incorrect polarity setting causes a sporadic triggering by the video information.
MODE
Selects line or frame triggering.
"LINE"
Triggers on the start of video lines. You can define the exact line
between 1 and 625, or trigger on all lines.
"FRAME"
Triggers on the start of half frames, either on odd or on even half
frames.
5.7 Trigger Out Pulses
You can output a pulse for each trigger event at the AUX OUT connector for each trig-
ger event, thus issuing the trigger frequency.
1. Press the UTIL key in the Vertical section of the control panel.
2. On page 2|2, select "ACQ. TRIGGER EV.".
5.8 External Trigger Input
You can use an external trigger signal, for example, for CS (chip select) of a SPI BUS.
The external trigger signal is displayed as green line.
1. Press the POD key.
2. To activate the external trigger, press the "EXT" softkey.
3. Press the MENU key in the Vertical section.
4. Press the "EXT. THRESHOLD" softkey and adjust the threshold for the external
trigger signal
External Trigger Input
