Fluke 124 FE 123 & 124 Users Manual - Page 37
Isolated Triggering, Triggering on Video Signals, Isolated Triggering
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Isolated Triggering Use the optically isolated trigger probe (ITP120, optional) to trigger on an external source, and to isolate the test tool from a trigger waveform. See Figure 1-17. To choose the isolated trigger probe, select 'EXT' in point of the previous example. Trigger level is fixed and is TTL compatible. 1 Using The Test Tool Triggering on a Waveform Triggering on Video Signals • Apply an interlaced video signal to the red input A. To trigger on a random video line, continue from point of the previous example as follows: Highlight VIDEO on A. Open the VIDEO TRIGGER submenu. Figure 1-17. Isolated Triggering Highlight PAL. Select PAL. Highlight RANDOM. Select RANDOM. 29
Using The Test Tool
Triggering on a Waveform
1
29
Isolated Triggering
Use the optically isolated trigger probe (ITP120, optional)
to trigger on an external source, and to isolate the test tool
from a trigger waveform. See Figure 1-17.
To choose the isolated trigger probe, select ‘EXT’ in point
²
of the previous example. Trigger level is fixed and is
TTL compatible.
Figure 1-17. Isolated Triggering
Triggering on Video Signals
•
Apply an interlaced video signal to the red input A.
To trigger on a random video line, continue from point
³
of the previous example as follows:
³
Highlight VIDEO on A.
´
Open the VIDEO TRIGGER
submenu.
µ
Highlight PAL.
¶
Select PAL.
·
Highlight RANDOM.
¸
Select RANDOM.