Tektronix 2212 Service Manual page 157

Adjustment Procedures
Video Triggering Checks and
Adjusbnents
(Option
05
only)
2212 Service
Manual
Video Triggering Checks and Adjustment procedures check and adjust
those characteristics that relate to the video trigger system. Use the test
equipment as shown at the start of the procedure list. Changes to the test
set-up will be indicated in the procedures, if necessary.
Equipment Required (See Table 5-1):
Video Generator (Item 6)
50
n
BNC Coaxial Cable (Item 7)
50
n
BNC Termination (Item 11)
Parameters used in this section are based on NTSC and PAL systems, being
the worlds most widely used systems.
Notation used: 525 (NTSC) I 625 (PAL).
Option 5 however, will work on a variety of standard and non-standard
video systems.
Initial Control Settings
Vertical
POSITION ( CH
1
and CH 2) ......... Midrange
MODE ............................................. CH2
CH 2 VOLTS/DIV .......................... 0.2
V
V ARiable ........................................ Off
AC-GND-DC ................................... DC
Horizontal
POSITION ...................................... Midrange
MODE ALT MAGN ........................ Off
SEC/DIV ......................................... 5 ms
V ARiable ........................................ Off
X1,X10,X50 Magnifier ................... X1
Trigger
HOLDOFF ....................................... MIN
LEVEL ............................................. Midrange
SLOPE ............................................. Positive Going (Field
1)
MODE ............................................. TV Field
SOURCE ......................................... CH 2
Storage
STORE ON ...................................... Off
Revised 3/93
5- 23