Tektronix 2220 Operator's Manual page 61

TV LINE SIGNAL
The following procedure is used to display a TV Line
signal:
1. Preset instrument controls and select P-P AUTO/TV
LINE TRIGGER Mode.
2. Apply the TV signal to either vertical-channe! input
connector and set the VERTICAL MODE switches to
display the channel used.
3. Set the appropriate VOLTS/DIV switch to display
0.3 division or more of composite video signal.
4. Set the SEC/DIV switch to 10 us.
5. Set the TRIGGER SLOPE switch to either OUT (for
positive-going TV signal sync pulses) or IN (for negative-
going TV signal sync pulses).
NOTE
To examine a TV Line signal in more detail, use the
X10 Magnifier.
TV FIELD SIGNAL
The television feature of the instrument can also be
used to display TV Field signais.
1. Preset instrument controls and obtain a baseline
trace.
Basic Applications--2220 Operators
2. Set the TRIGGER Mode switch to TV FIELD (P-P
AUTO and NORM buttons both pushed in) and set the
SEC/DIV switch to 2 ms.
3. To display a single field, connect the TV signal to
either vertical-channei input connector and set the VERTI-
CAL MODE switch to display the channel used.
4. Set the appropriate VOLTS/DIV switch to display
2.5 divisions or more of composite video signal.
5. Set the TRIGGER SLOPE switch to either OUT (for
positive-going TV signal sync pulses) or IN (for negative-
going TV signal sync pulses).
6. To change the field that is displayed, momentarily
interrupt the trigger signal by setting the AC-GND-DC
switch to GND and then back to AC until the desired field
is displayed.
NOTE
To examine a TY Field signal in more detail, use the
X10 Magnifier.
7. To display either Field 1 or Field 2 individually, con-
nect the TV signal to both CH 1 and CH 2 input connec-
tors and select BOTH and ALT VERTICAL MODE.
8. Set the SEC/DIV switch to a faster sweep speed
(displays of less than one full field). This will synchronize
the Channel 1 display to one field and the Channel 2
display to the other field.
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