Tektronix 2225 User Manual

Applications
TELEVISION DISPLAYS
TV Field Signals
The television feature of the 2225 can be used to display TV Field
signals.
1. Set the TRIGGER MODE switch to TV FIELD and set the SEC/
DIV switch to 2 ms.
2. Apply the television signal to either the CH 1 or the CH 2 input
connector and set the VERTICAL MODE switch to display the
channel used.
3. For positive-going TV signal sync pulses, set the TRIGGER
SLOPE switch t o ^ “ and rotate the LEVEL control fully clock
wise. For negative-going sync pulses, set the SLOPE switch to
and rotate the LEVEL control fully counterclockwise.
4. Set the appropriate VOLTS/DIV switch to display one division
or more of composite video signal.
5. To change the TV field that is displayed, momentarily interrupt
the trigger signal by setting the input coupling switch to GND
then back to DC or AC until the desired field is displayed.
NOTE
To examine a TV Field signal in more detail, set the
FIORIZONTAL MODE switch to either ALT or MAG and
select either X5, X10, X50 magnification.
6. To display either Field 1 or Field 2 individually, connect the tele
vision signal to both the CH 1 and CH 2 input connectors and
select BOTH and ALT VERTICAL MODE. Set the SEC/DIV
switch to 0.5 ms or faster sweep speed (displays less than one
full field). This will synchronize the Channel 1 display to one
field and the Channel
2 display to the other field.
TV Line Signals
The following procedure is used to display a TV Line signal.
1. Verify that TRIGGER MODE is set to P-P AUTO/TV LINE.
2. Apply the Television signal to either the CH 1 or the CH 2 input
connector and set the VERTICAL MODE switch to display the
channel used.
3. Set the SEC/DIV switch to 10 |xs.
4. For positive-going TV signal sync pulses, set the TRIGGER
SLOPE switch to _y^and rotate the LEVEL control fully clock
wise. For negative-going sync pulses, set the SLOPE switch to
and rotate the LEVEL control fully counterclockwise.
5. Set the appropriate VOLTS/DIV switch to display 0.3 division or
more of composite sync signal.
2225 Operators
3-15

Tektronix 2225 Specifications

General

Brand	Tektronix
Model	2225
Category	Test Equipment
Language	English