TB 9-6625-1356-35
NOTE
Do not change REF SET controls throughout remainder of
test.
(f) AMPLITUDE controls for minimum output.
(3) Substitute thermal converter for 50 Ω feed-through termination. Adjust
AMPLITUDE controls for 0
indication on TI
meter expand scale. Record multimeter
indication.
(4) Set FREQUENCY RANGE switch to X1M and turn FREQUENCY dial to 10.
(5) Adjust AMPLITUDE controls until multimeter indication equals:
A - 2B x A
100
Where: A = value recorded in (3) above.
B = AC/DC test report correction in percent
Example:
A = 7 mV
B = -0.1
7 - (0.002 x 7)
7 - (0.014)= 7.014 mV
(6) If TI meter does not indicate between -0.25 and +0.25 percent on expand scale,
perform b below.
(7) Repeat technique of (4) through (6) above for FREQUENCY RANGE and
FREQUENCY dial
settings listed in
table 6. TI
meter will
indicate between -0.25 and
+0.25 percent on expand scale.
Test instrument
FREQUENCY RANGE
FREQUENCY
switch settings
dial settings
X1M
3
X1M
1
X100K
1
X10K
5
X10K
1
X10
5
b. Adjustments.
Adjust A3C11 (fig. 2) for a 0
indication on TI
meter expand scale (R).
a. Performance Check
(1) Connect audio analyzer to TI using a 50 Ω feed-through termination.
(2) Position controls as listed in (a) through (c) below:
(a) FREQUENCY RANGE switch to X1K.
(b) FREQUENCY dial to 1.