TB 9-5915-214-24
g. Connect calibrator to INPUT CH 1 using 50 : termination.
h. Connect true rms voltmeter to test point TP 4 (fig. 1) and chassis ground.
i. Adjust calibrator for a 200 Hz, 1 V output and reference true rms voltmeter to 0 dB.
j. Alternate calibrator and TI frequencies between 25.6 kHz and 175 kHz using
technique of f above to enter TI frequency. Adjust C167 (fig. 1) for a -5.33 dB true rms
voltmeter indication or split the difference between the two readings.
k. Connect true rms voltmeter to TP 2 (fig. 1) and chassis ground.
l. Alternate calibrator and TI frequencies between 25.6 kHz and 175 kHz using
technique of f above to enter TI frequency. Adjust C147 (fig. 1) for a -5.33 dB true rms
voltmeter indication or split the difference between the two readings.
m. Adjust calibrator for a 2.1 kHz, 1 V output.
n. Press corresponding keys as listed in (1) through (5) below and verify CUTOFF
FREQUENCY indicates 2.100.
(1) 2 data entry key.
(2) . data entry key.
(3) 1 data entry key.
(4) KILO parameter key.
(5) FREQ parameter key.
o. Alternate between TP 2 and TP 4. Adjust R162 (fig. 1) for a -5.33 dB true rms
voltmeter indication or split the difference between the two test point readings.
p. Connect true rms voltmeter to test point TP 4 (fig. 1) and chassis ground.
q. Press corresponding keys as listed in (1) through (5) below and verify CUTOFF
FREQUENCY indicates 256.0.
(1) 2 data entry key.
(2) 5 data entry key.
(3) 6 data entry key.
(4) KILO parameter key.
(5) FREQ parameter key.
r. Adjust calibrator for a 256 kHz, 1 V output. If true rms voltmeter does not
indicate -5.33 dB, adjust C164 (fig. 1) until true rms voltmeter indicates -5.33 dB.
s. Press MODE parameter key until CUTOFF FREQUENCY display indicates h.P.
t. Connect true rms voltmeter to test point TP 2 (fig. 1) and chassis ground. If true
rms voltmeter does not indicate -5.33 dB, adjust C144 (fig. 1) until true rms voltmeter
indicates -5.33 dB.
u. Press MODE parameter key until CUTOFF FREQUENCY display indicates L.P.
v. Connect true rms voltmeter to test point TP 4 (fig. 1) and chassis ground.
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