Tv Field Signal Measurement - Tektronix 2212 User Manual

Non-Storage Examples
TV Field Signal
Measurement
The television triggering feature of the instrument can also be used
to display TV Field signals.
Step
1.
Switch the 2212 on and obtain a baseline display in Non-
Store mode.
Step 2. Toggle the Trigger MODE switch to TV FIELD and set the
SEC/DIV switch to 2 ms.
Step 3. Connect the TV signal to either vertical-channel input
connector to display a single TV field pulse, and toggle
the Vertical MODE switch to display the channel used.
Step 4. Set the appropriate VOL TS/DIV switch to display
2.5 divisions or more of the composite video signal.
Step 5. Set the Trigger SLOPE switch to either positive slope for
positive-going TV signal sync pulses or negative slope for
negative-going TV signal sync pulses.
Step 6.
If you want to change the TV field that is displayed, mo-
mentarily interrupt the trigger signal by toggling the
AC-GND-DC switch to GND and then back to AC until the
desired TV field is displayed.
NOTE
To examine a TV Field signal in more detail, toggle the
Horizontal Magnify switch to X10.
Step
7.
If you want to display either TV Field 1 or TV Field 2
individually, connect the TV signal to both the CH1 OR X
and CH2 ORY input connectors and select ALT Vertical
Mode.
Step 8. Set the SEC/DIV switch to a faster sweep speed (so the
display is less than one full field). This will synchronise
the CH 1 display to one TV field pulse and the CH 2 dis-
play to the other TV field pulse.
2212 User Manual
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