Tektronix T912 - Vertical

Options —T912
DIFFERENTIAL BALANCE
ADJUSTMENT
(Perform
after Step
6
of
VERTICAL
AMPLIFIER
ADJUSTMENTS)
1.
Set:
CH 1
and CH 2
AC-GND-DC
GND
Vertical Mode
CH
1
2.
Adjust
CH 1 POSITION to move the trace to the
center horizontal graticule line.
3
Set: Vertical Mode
CH 2
CH 2
POSITION
Midrange
4. ADJUST—Differential Balance,
R4259. Alternately
push the CH 2
and DIFF buttons. The adjustment is
correct when there is
no
vertical
trace shift while
alternate-
ly pushing the CH 2
and
DIFF buttons. You may need to
readjust
the
CH
2
POSITION control to keep
the trace on
the screen.
FRONT
(
1982
)
1981-20
Fig. Option
1-1.
Adjustment
locations.
@
Option 1 Page 4