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4 - 26 HOW TO USE THE INSTRUMENT
TRIGGER SOURCE
- Press the TRIG 2 key in the CH2 section of the front panel to select
channel 2 as trigger source.
The indication in the lower right hand readout area of the screen now displays ’ch2’.
Observe that the signal is not triggered. The ARM’D LED is on.
- Press the TRIG 1 key in the CH1 section of the front panel to select
channel 1 as trigger source.
Observe that the indication has now changed into ’ch1’ and the signal is triggered
again.
TRIGGER SLOPE
The trigger source selection key is also used to select the trigger slope
between the positive-and negative-going edge of the triggering signal.
- Press the TRIG 1 key in the CH1 section of the front panel a second time.
Observe that the signal now starts with the trailing edge instead of a leading edge.
Also the trigger slope symbol in the lower right hand corner of the readout area
indicates a trailing edge.
ch2
ch1
TRIG1
CH1
CH1
TRIG2
ST5955
TRIG1
ch1
ch1
TRIG1
ST6025