TB 9-6695-263-35
(2) Connect signal generator output to TI INPUT.
deviation at a 1 kHz rate.
(4) Press 41.1 SPCL and 10.0 SPCL pushbuttons.
(5) Position controls as listed in (a) through (d) below:
(a)
MEASUREMENT AM pushbutton pressed.
(b)
HP FILTER 50 Hz pushbutton pressed.
(c)
LP FILTER 3 kHz pushbutton pressed.
(d)
DETECTOR AVG. pushbutton pressed.
(6) Adjust A6C8 IF FLATNESS (fig. 1) until TI indicates a minimum but less than
0.2 percent (R).
(7) Disconnect signal generator and reconnect cable disconnected in (1) above.
(8) Adjust calibrator to 10 kHz frequency and output level for 2 V ac.
(9) Set calibration fixture test mode switch to FM.
(10) Position controls as listed in (a) through (c) below:
(a) MEASUREMENT FM pushbutton pressed.
(b) All LP FILTER pushbuttons pressed to off.
(c) DETECTOR PEAK + (positive) pushbutton pressed.
(12) Press 3.1 SPCL and MEASUREMENT FM pushbuttons.
(13) Adjust calibrator output level to 10 kHz peak deviation as indicated on TI.
(14) Adjust A17L11 FM DISTN (fig. 1) for less than 0.1 percent distortion indication
on audio analyzer (R).
a. Performance Check
(1) Connect equipment as shown in figure 2, except connect calibration fixture FM
4 OUTPUT to TI INPUT.
(2) Set calibration fixture test mode switch to FM.
(3) Set calibrator for a wideband output frequency of 200 Hz at a level of 130 mV.
(4) Press 41.0 SPCL pushbuttons.
(6) Position TI controls as listed in (a) through (c) below:
(a) INPUT FREQ MHz pushbutton pressed.
(b) MEASUREMENT FM pushbutton pressed.
(c) DETECTOR AVG pushbutton pressed.
(7) Adjust calibrator output level for a 25 kHz average deviation as indicated on TI.