TB 9-6625-2059-35
(17) Connect multimeter to TI multimeter INPUT. Set PWR-OFF-BATT switch
to OFF.
(18) Set TI multimeter FUNCTION switch to 600. Multimeter will indicate between
504 and 616 Ω.
(19) Set TI multimeter FUNCTION switch to positions listed in table 17.
Multimeter will indicate within limits specified.
Multimeter
TI Multimeter
(Ω)
FUNCTION switch settings
Min
Max
150
135
165
8
7.2
8.8
3.2
2.88
3.52
(20) Disconnect multimeter from equipment setup. Set PWR-OFF-BAT switch to PWR.
(21) Connect INT MOD OUT to TI multimeter INPUT and audio analyzer.
(22) Set TI multimeter FUNCTION switch to HI-Z and RANGE switch to SINAD.
(23) Adjust VAR control until audio analyzer voltmeter indicates 0.3 V.
(24) Adjust 1 kHz control until TI multimeter indicates 50 percent distortion (6 dB on
SINAD scale).
(25) Measure distortion at 4 kHz, and then adjust 1 kHz control until audio analyzer
indicates 50 percent distortion. If TI multimeter does not indicate between 4.5 and 7.5 dB
on SINAD scale, perform b (7) below. Adjust 1 kHz control fully ccw.
(26) Set TI multimeter RANGE switch to 0-10%.
(27) Adjust 1 kHz control until TI multimeter indicates 10 percent distortion. If
audio analyzer does not indicate between 8.5 and 11.5 percent distortion, perform b (8) and
(9) below.
(28) Set TI multimeter RANGE switch to 0-30%.
(29) Adjust 1 kHz control until TI multimeter indicates 30 percent distortion. If
audio analyzer does not indicate between 26.5 and 33.5 percent distortion, perform b (8)
and (9) below and adjust for best in-tolerance condition.
CAUTION
Do not exceed -30 dBm input to antenna.
(30) Set 1 kHz and VAR controls to OFF.
(31) Connect signal generator to measuring receiver input.
modulation at -30 dBm.
31