TB 9-6625-2343-50
R12
C20
TRAPEZOID
FREQ
SYMM
FM
FM CALIBRATOR
A51
(14) Press TI keys as listed in (a) through (d) below:
(a)
DATA 12.2.
(b)
DATA SPCL.
(c)
DATA 5.1.
(d)
DATA SPCL.
(15) Alternately switch TI DETECTOR between PEAK+ and PEAK- and note the
display for each detector.
(16) Adjust A51R12 TRAPEZOID SYMM (fig. 8) until the readings are the same for
both detectors within 0.010 kHz. (R)
(17) Press TI keys as listed in (a) and (b) below:
(a) MEASUREMENT FM.
(b) CALIBRATION CALIBRATE.
(18) Allow TI to take at least two readings.
(19) Adjust A4R50 FM SENS (fig. 9) for a displayed indication between 99.95 and
100.05 percent. (R)
R85
R50
FM
FM
FLATNESS
SENS
FM SENSITIVITY &
FM FLATNESS
A4
A4
Figure 9. A4 board.
(20) Press TI INSTR PRESET key.
(21) Connect TI sensor module to AM/FM test source FM OUTPUT.
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