V I D E O
V E R T I C A L
S Y N C .
P U L S E
IF
A M P
T E L E V I S I O N S E T
S O U N D
IF
C O L O R
I F
S T A R T W I T H
2 M S / d i v
P I C T U R E
T U B E
Fig. 18 Set-up for viewing fields
1
and
2
of V I T S information
information will appear toward the right hand
portion of the expaned waveform displays.
The waveform information on each trace may
appear as shown in F i g . 1 6 . Because there is
no provision for synchronizing the oscilloscope
display to either of the two fields which
comprise a complete vertical frame, it cannot
be predicted which field display will appear on
CH1 or C H 2 .
10. Pull the <> POSITION control outward to
obtain an additional X 1 0 magnification.
Rotate the control in a counterclockwise di-
rection moving the trace to the left until the
expanded V I T S information appears as shown
in F i g . 16. Because of the low repetition rate
and the high sweep speed combination, the
brightness level of the signal displays will be
reduced.
1 1 . Once the C H 1 and C H 2 displays have been
identified a s being either Field 1 or Field 2
V I T S information, the probe corresponding to
the waveform display which is to be used for
signal-tracing and troubleshooting can be
used, and the remaining probe should be left at
the video detector test point to insure that the
sync signal is not interrupted. If the sync sig-
nal is interrupted, the waveform displays may
be reversed because, a s previously explained,
there is no provision in the oscilloscope to
identify either of the two vertical fields which
comprise a complete frame.
19
V E R T I C A L
B L A N k l N G
V I D E O
D E T E C T O R
V I D E O
A M P
V I D E O
A M P
