TB 9-6695-263-35
(5) Adjust calibrator to frequencies listed in table 3 without changing output level.
TI will indicate within limits specified.
Test instrument AM limits (% REL)
Calibrator frequencies (Hz)
Min
Max
50,000
98.9
101.1
100,000
96.9
103.1
50
98.9
101.1
20
96.9
103.1
201
96.9
103.1
50
97.9
102.1
10,000
97.9
102.1
1Press
3.1 SPCL pushbuttons.
b. Adjustments. No adjustments can be made.
a. Performance Check
(1) Set TI controls as listed in (a) through (c) below:
(a) RATIO % pushbutton off.
(b) HP FILTER 50 Hz pushbutton on.
(c) LP FILTER 3 kHz pushbutton on.
(2) Set calibrator for a wideband output of 1 kHz at an amplitude of 175 mV.
(3) Adjust calibrator output amplitude for a 50 percent AM indication on TI display.
(4) Press TI MEASUREMENT FM pushbutton.
(5) Momentarily disconnect calibration fixture audio input. Record TI residual FM
indication.
(6) Reconnect calibration fixture audio input. Record TI FM indication. Displayed
FM indication minus one-half residual FM value recorded in (4) above will be 20 Hz peak or
less.
(7) Press 3.0 SPCL pushbuttons. Repeat (4) through (6) above.
b. Adjustments. No adjustments can be made.
a. Performance Check
(1) Connect TI CALIBRATION OUTPUT to TI INPUT.
(2) Press FM and CALIBRATION pushbuttons and allow time for at least two
readings. TI indication will be between 99 and 101 percent. Record TI indication.
(3) Press 2.3 SPCL pushbuttons and allow time for two readings. If TI does not
indicate between 99 and 101 percent, perform b below.
(4) Disconnect cable connected in (1) above.