Tektronix 2232 - Triggering on Line Frequency; Triggering on TV Signals; Triggering with an External Signal

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2232 User Manual 3-29
Displaying Signals
Triggering on Line Frequency
To trigger on power line signals, apply the signal to an input and move the A
COUPL
switch to A LlNE SOURCE.
Triggering with an External Signal
Trigger one- or two-channel displays with an externally applied signal using
the following procedure:
Step 1: Apply the external signal to the EXT INPUT connector using a
coaxial cable.
Step 2: Set the A 81 6 SOURCE to A EXT.
Step 3: Select the A EXT COUPL mode: AC, DC, or DC -F 10.
0 Step 4: Adjust the A TRIGGER LEVEL for a stable display.
Triggering on TV Signals
You can trigger on either TV line or TV field signals.
Triggering on a TV Line Signal
Step
1: Push in the P-P AUTO/TV LlNE trigger mode button.
Step 2: Apply the TV signal to a channel input and display the channel.
Step 3: Set the VOLTSIDIV switch to display 0.3 or more of composite
video signal.
Step 4: Set the A SECIDIV switch to 10 ps.
Step 5: Set the A TRIGGER SLOPE switch either out (for positive-going
TV Signal sync pulses) or in (for negative-going TV signal sync pulses).
Step 6: Adjust the A TRIGGER LEVEL stabilize the display (Figure
3-27).