MIL-PRF-49192A(CR)
3.1.1.1 Physical characteristics. The design and physical characteristics shall be such that
the equipment can be easily installed in standard equipment racks 24 inches maximum height, 21
inches maximum depth and 22.5 inches maximum width. The maximum weight shall be 50
pounds. The equipment shall be readily accessible for maintenance and/or calibration.
3.1.2 Preconditioning. Each deliverable equipment shall be subjected to a minimum of 96
hours burn-in prior to Group A testing. During the last 24 hours of the burn-in period the
equipment must operate failure free. Equipment that fails during the last 24 hours of burn-in shall
be repaired and resubmitted for testing until it successfully passes a 24 hour period without
failure.
3.1.3 Output frequency. The output frequency range of the equipment, shall extend from
400 Khz to 512 MHz, selectable in 1 Khz steps, over a maximum of six frequency bands.
3.1.3.1 Output frequency response. The minimum required accuracy shall be ±0.5
percent of the output frequency and the output level shall not vary more than ±2dB over any
individual frequency band.
3.1.3.2 RF spurious output. The total harmonic content of the rf output shall be at least
40 dB below the level of the unmodulated carrier.
3.1.3.3 RF noise level. The rf noise level shall be at least 35 dB below the level of the
unmodutated carrier.
3.1.4 Amplitude modulation (AM). The equipment shall have the capability of amplitude
modulation of the carrier signal with an internal or external sine or square wave at a frequency of
at least 20 Hz to 20 KHz.
3.1.4.1 External AM sensitivity. An external sine or square wave of less than 5 volts
peak-to-peak shall produce a modulation level of at least 95 percent.
3.1.4.2 Percent modulation. The equipment shall be capable of 0 to 95 percent amplitude
modulation by both an external audio tone and an internal audio tone.
3.1.5 Amplitude modulation, internal. The internal amplitude modulation frequency shall
be selectable between the frequencies of 400 Hz and 1000 Hz with a frequency accuracy of ±5
percent.
3.1.5.1 Modulation distortion. The distortion of the amplitude modulated carrier shall not
exceed 2 percent.
3.1.6 Pulse modulation (PM). The equipment shall be capable of being pulse modulated
by an internal or external signal at repetition rates of 50 to 5000 pulses per second with pulse
widths varying from 10 to 40 microseconds.
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