TB 9-6625-2317-50
(3) Press TI pushbuttons (on) as indicated in (a) through (h) below:
(a) CARR FREQ then 1, 2, . (decimal), 5 MHZ.
(b) LEVEL DISPLAY to AM.
(c) LEVEL UNITS to ABS.
(d) LEVEL DETECTOR MODE to + PEAK.
(e) HIGH PASS FILTER to 50 Hz.
(f) LOW PASS FILTER to 15 kHz.
(g) FREQ DISP to RF.
requires approximately 20 seconds).
(4) On audio analyzer, press pushbuttons as indicated in (a) through (d) below:
(a)
SOURCE FREQ to 1000 Hz.
(b)
SOURCE LEVEL to 246 mV.
(c)
SPCL 75.
(d)
ANALYZER DIST (on).
(5) On measuring receiver press FREQ pushbutton.
(6) On AM/FM test source, set TEST MODE switch to AM and adjust CARRIER
FREQUENCY TUNE control for 12.5 MHz display indication on
measuring receiver.
(7) On measuring receiver, press AM pushbutton and record amplitude modulation
displayed indication.
(8) Connect equipment as shown in figure 5, CONNECTION B.
(9) TI LEVEL/DATA ENTRY display will indicate within 2.5% + one count of the
recorded value in (7) above.
(10) Audio analyzer display will indicate <0.3% distortion.
(11) Connect equipment as shown in figure 5, CONNECTION A.
(12) On audio analyzer, press SOURCE LEVEL pushbuttons to 492 mV.
(13) On measuring receiver, record amplitude modulation displayed indication.
(14) Connect equipment as shown in figure 5, CONNECTION B.
(15) TI LEVEL/DATA ENTRY display will indicate within 2.5% + one count of the
recorded value in (13) above.
(16) Audio analyzer display will indicate < 0.6% distortion.
b. Adjustments. No adjustments can be made.
13. FM Accuracy and
Distortion
a. Performance Check
(1) Connect equipment as shown in figure 6, CONNECTION A.