TB 9-6625-1213-24
(2) Repeat a (1) through (4) above and if required, adjust R6 for best in-tolerance
indication.
a.
Performance Check
(1) Connect function/arbitrary generator to TI INPUT.
(2) Connect true rms voltmeter to TI OUTPUT and set GAIN switch to 40 dB.
(3) Adjust function/arbitrary generator frequency for 1000 Hz and, -20.0 dB output.
Record TI output voltage as indicated on voltmeter.
(4) Adjust function/arbitrary generator frequency for 20 Hz, 10 kHz, 100 kHz,
500 kHz, and 1 MHz in succession while adjusting output level as necessary to maintain true
rms voltmeter indication recorded in (3) above. If function/arbitrary generator output
indication is not within 0.5 dB of reference level indication for each frequency,
perform b (1) below.
(5) Adjust function/arbitrary generator frequency for 2 MHz. If function/arbitrary
generator output indication is not within 1 dB of reference-level indication, perform b (1)
below while repeating (4) and (5) above for best compromise.
(6) Repeat technique of (3) and (4) above with function/arbitrary generator output
set to 0 dB and TI GAIN switch set to 20 dB.
(7) Adjust function/arbitrary generator frequency for 1.2 MHz. If indication on
function/arbitrary generator is not within 1 dB of reference level indication, perform b (1)
and (2) below.
b.
Adjustments
(1) Adjust C11 (fig. 1) for an in-tolerance indication (R).