TB 9-6625-1966-24
(4) Measure. risetime, using standard risetime technique. If risetime is not 400 ns
or less, with overshoot less than 5 percent and sag less than 1 percent, perform b (1) below.
(5) Set TI OFFSET SQUARE slide switch to - (negative) and repeat (4) above.
(6) Remove connection from CHANNEL A OUTPUT and connect to CHANNEL B
OUTPUT.
(7) Repeat (2) through (5) above for CHANNEL B OUTPUT.
(8) Adjust CHANNEL A and B AMPLITUDE controls fully ccw.
b. Adjustments
(1) While switching OFFSET SQUARE slide switch back and forth between + and -,
adjust A2C6 (fig. 6) for optimum flat top square wave (R).
(2) While switching OFFSET SQUARE slide switch back and forth between + and -,
adjust A2C7 (fig. 6) for optimum flat top square wave (R).
29. Sawtooth Generator Dial
a. Performance Check
(3) Position controls as listed in (a) through (d) below:
(a) FREQUENCY dial to 10.
(b) CHANNEL A slide switch to SAWTOOTH.
(c) SAWTOOTH slide switch to + (positive).
(d) RANGE selector switch to X100.
(4) Measure frequency. If frequency counter does not indicate between 950 and
1050 Hz, perform b (2) through (5) below.
(5) Repeat technique of (4) above at settings listed in table 7. Frequency counter
will indicate within limits specified.
Table 7. Sawtooth Dial Accuracy
Test instrument
Frequency counter indications
FREQUENCY dial
RANGE switch settings
Min
Max
settings
X.01
10
11.1
s
9.09
s
X.1
10
1.11
s
909
ms
X1
10
105
ms
95.3 ms
X10
10
10.5 ms
9.53 ms
X1K
10
9.5 kHz
10.5 kHz
X10K
10
95
kHz
105
kHz
b. Adjustments
(1) Set RANGE switch to X100.