TB 9-6625-1966-24
(3) Connect oscilloscope to function generator CHANNEL A OUTPUT.
If
oscilloscope does not display square wave with amplitude of 15 V or greater, perform b (1)
through (3) below.
(4) Set TI OFFSET SQUARE slide switch to - (negative) and repeat (3) above. If
square wave on oscilloscope is not 15 V or greater in amplitude, perform b (1), (2), and (4) below.
(5) Remove connection from CHANNEL A and connect to CHANNEL B OUTPUT.
(6) Repeat (1) through (3) above for CHANNEL B.
If indications are not as
specified, perform b (1), (2), and (5) below.
(7) Repeat (4) above. If indications are not as specified, perform b (1), (2), and (6) below.
(8) Turn CHANNEL A and B AMPLITUDE controls fully ccw.
b. Adjustments
NOTE
Function generator frequency is set so that multimeter will
read top of square wave for 5 seconds and bottom for 5 seconds.
(2) Connect multimeter positive lead between bottom center contact on CHANNEL A
slide switch XA1 pin F (fig. 6) and negative lead to circuit ground.
(3) Adjust A2R11 (fig. 6) until top of square wave indicates 10 V on multimeter and
bottom of square wave indicates between +1.5 and 2.5 V (R).
(4) Adjust A2R13 (fig. 6) until bottom of square wave indicates 10 V on multimeter
and top of square wave indicates between +17.5 and +18.5 V (R).
(5) Adjust A2R16 (fig. 6) until top of square wave indicates 10 V on multimeter and
bottom of square wave indicates between +1.5 and 2.5 V (R).
(6) Adjust A2R18 (fig. 6) until bottom of square wave indicates 10 V on multimeter
and top of square wave indicates between +17.5 and +18.5 V (R).
28. Square Wave Pulse Response
a. Performance Check
(1) Connect oscilloscope to function generator CHANNEL A OUTPUT.
(2) Adjust function generator CHANNEL A AMPLITUDE control fully cw.
(3) Set TI OFFSET SQUARE slide switch to + (positive).