Television Displays; Tv Field Signals - Tektronix 2205 Operator's Manual

TELEVISION DISPLAYS

TV Field Signals

The 2205 television feature can be used to display TV field sig­
nals. To do so, proceed as follows:
1. Set the TRIGGER MODE selector to TV FIELD and set the
SEC/DIV control to 2 ms.
2. Apply the television signal to either the CHI or the CH2 input
connector and set the VERTICAL MODE selector to display
the channel used.
3. For positive-going TV signal sync pulses, set the TRIGGER
- T
SLOPE to
wise. (Sometimes it may be necessary to move the LEVEL
control slightly clockwise to obtain stable triggering.)
4. Set the appropriate VOLTS/DIV control to display one divi­
sion or more of composite video signal.
5. To change the TV field being displayed, momentarily inter­
rupt the trigger signal by setting the input coupling to GND,
then back to DC or AC until the desired field is displayed.
To examine a TV Field signal in more detail, set
HORIZONTAL MAG to X I 0.
6. To display either Field 1 or Field 2 individually, connect the
television signal to both the CHI and CH2 input connectors
and select BOTH and ALT VERTICAL MODE.
DIV control to 0.5 ms or faster sweep speed (displays less
than one full field). This will synchronize the Channel 1 dis­
play to one field and the Channel 2 display to the other field.
2205 Operator's
and rotate the LEVEL control fully counter­
NOTE
Applications
Set the SEC/
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