Tektronix 2212 - Trigger; Trigger Value; Trigger Source

CRT Readout
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Trigger
''Trig" indicates that the Trigger circuit is in operation.
In X-Y non-store mode, the trigger circuit doesn't influence the
display, and therefore "Trig" is not displayed.
Trigger Value
The Trigger Value readout field indicates the value of the Trigger
Level and the Trigger Coupling type. This field is disabled in X-Y
mode.
Trigger Source
The Trigger Source readout field indicates the current trigger
source.
Possible readouts are :
CH1
CH2
VERT
EXT
LINE
In Detail