TB 9-6625-2084-24
8. Vertical Gain and Linearity
a. Performance Check
CAUTION
Set power switch to OFF when installing and removing plug-ins.
(1) Adjust calibration fixture position control to align intensified trace on horizontal
graticule center line. If TI does not display 6 divisions 0.5 minor division of vertical
deflection for 7 center horizontal lines, perform b (1) below.
(2) Remove calibration fixture from left vertical compartment and install in right
vertical compartment.
(3) Press VERT MODE RIGHT and TRIG SOURCE RIGHT pushbuttons.
(4) Repeat a (1) above. If TI does not display 6 divisions 0.5 minor division of
vertical deflection for 7 center horizontal lines, perform b below.
b. Adjustments
(1) Adjust GAIN R2446 (fig. 1A) for Types 7613/R7613 with SN B150000 and above,
7633, 7623 and R7623A. Adjust R447 (fig. 1B) for 7623 and 7613/R7613 with SN B149999
and below for 6 divisions of vertical deflection (R).
(2) Repeat a (1) through (4) above for best compromise and optimum gain for both
vertical compartments (R).
Figure 1A. Board A5 adjustments - left side view - Tektronix, Types 7613/R7613, SN B150000 and above,
7623A/R7623A and 7633.
