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|  MIL-T-81785C(AS)
(3)
Frequency modulated ranging (FMR) linearity. Measure
frequency variation from the ideal FMR slope character-
istics, in the frequency region about the ideal frequency,
50 Hz.
to an accuracy of
AIM-54 missile rear link command. - Measure frequency to
(4)
1 kHz in the X-band region.
an accuracy of
AIM-7F pulse doppler modulation. Measure:
(5)
(a) Modulation frequency to an accuracy of
0.5 Hz.
5 percent for
(b) Modulation index to an accuracy of
indices between O and 30.0.
Frequency modulation (FM) and amplitude modulation (AM)
(6)
noise. Measure-
(a) FM noise to an accuracy of
2 dB in the range of
40 to 80 dB below the carrier.
(b) AM noise to an accuracy of
3 dB in the range of
100 to 140 dB below the carrier.
Reference oscillator output
c.
(1) Frequency. Measure the reference oscillator frequency
10 Hz in the IF region.
to an accuracy of
(2) Voltage. Measure voltage output to an accuracy of
0.05 V, root mean square (rms) in the region of 1.0 V.
d.
Built in test (BIT) functions
(1)
BIT FMR Ramp. Measure ramp width to an accuracy of
30 microseconds(v sec.) in the region of 8 milliseconds
(ms) .
BIT reference. Compare TO/LO offset against BIT reference
(2)
10 Hz in the IF region.
to an accuracy of
Phase lock bandwidth. Verify bandwidth to an accuracy of
(3)
10 Hz over a range in the region of 4 megahertz (MHz).
Verify BIT X-band switch isolation in excess of 30 dB and
(4)
measure BIT target power in the region of -SO dBm, both
2.0 dB for the following:
to an accuracy of
(a) BIT RCVR TGT
(b) BIT RADOME HORN TGT
(c) MOAT TGT
Verify BIT power monitors. Measure BIT TO and continuous
(5)
wave illuminator (CWI) monitor levels to an accuracy of
1.0V in the region of 10.5V.
e.
Pulse compression. Measure incremental frequency of inverted
spectrum to an accuracy of
10 Hz over a range in the region of
3 MHz.
CWI driver.
-10-
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