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TM
Trigger Mode
Selects a trigger mode: free, line, video, TV, or external.
Syntax
XTM
Equivalent Softkeys: The keys accessed by
L‘TRIG).
Related Commands: DL.
Example
OUTPUT
718;"TM
EXT;"
Activates the
extol
trigger
mode.
Description
The conditions of the four trigger modes are as follows:
FREE
VID
LINE
EXT
TV
allows the next sweep to start as soon as possible after the last sweep. The functions
of TM FREE and
FIZZ
RUN
are identical.
allows the next sweep to start if the trace data rises across a level set by the display
line. The functions of TM VID and
BIDED
are identical.
allows the next sweep to start when the line voltage passes through zero, going
positive. The functions of TM LINE and
LIYE
are identical.
allows the next sweep to start when an external voltage level passes through
approximately 1.5 V, going positive. The external trigger signal level must be between
0 V and + 5 V. Connect the external trigger to the EXT TRIG INPUT. The functions of
TM EXT and
l%l’ERl?AL
are identical.
allows TV triggering if Options 101 and 102, or Option 301 is installed. The functions
of TM TV and
TV
TftIG
are similar. TM TV does not select the TV line number, set up
the amplitude level, change the span, change the bandwidth, or change the sweep
time.
Note
Some spectrum analyzer functions are not performed until the spectrum
analyzer is triggered.
5-554
Programming Commands