Trigger Controls And Connector; Trigger Level Control; Trig'd Indicator; Trigger Slope Switch - Tektronix 2212 User Manual

Trigger
Trigger Controls and
Connector
5- 22
See Figure 5-4 for the location of items 25 through 32.
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Trigger LEVEL Control
The Trigger LEVEL control selects the amplitude point on
the signal that produces triggering. The trigger level is
displayed in the crt readout (the trigger display field) as a
voltage readout, referenced to the input signal.
The readout display of the trigger is enabled if the trigger
COUPLING is in DC and one of the following conditions ex-
ists:
- The trigger SOURCE is CH 1 and CH 1 is DC coupled
and in calibrated position.
- The trigger SOURCE is CH 2 and CH 2 is DC coupled
and in calibrated position.
- The trigger SOURCE is VERT and one of the following
conditions is met:
- Vertical MODE switch is in CH
1
and CH
1
is in DC
and in calibrated position.
- Vertical MODE switch is in CH 2 or X-Y and CH 2 is
in DC and in calibrated position.
- Vertical MODE switch is in ADD or ALT, DC coupled
and the CH
1
and CH 2 deflection factors are the
same.
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TRIG'D Indicator
The TRIG'D LED indicator turns on when triggering occurs
in the P-P AUTO, NORM, and TV FIELD trigger modes.
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Trigger SLOPE Switch
With the trigger SLOPE switch you can select either the
positive or negative slope of the trigger signal to start the
sweep. The LED indicator for the selected SLOPE lights.
In Detail