MIL-PRF-49192A(CR)
3.1.7 Frequency modulation (FM) deviation. The equipment shall have both an internal
and external capability of 0 to 40 KHz deviation.
3.1.7.1 FM internal spurious AM. The spurious amplitude modulation shall not exceed 5
percent, when the signal generator is frequency modulated at any frequency with deviation set at
40 KHz.
3.1.7.2 Carrier frequency shift. Deviation of the frequency spectrum up to and including
25 KHz with modulating frequencies cited in this specification shall not cause a carrier shift in
excess of 0.005 percent of the carrier frequency.
3.1.7.3 Modulation voltage. The voltage required to produce a 10 KHz deviation in the
range from 100 Hz to 15 KHz shall not differ more than ± 10 percent from the voltage required at
1000Hz and shall not exceed ± 20 percent from 15 KHz to 30 KHz.
3.1.8 RF voltage output. As a minimum the output voltage range shall be variable from
0.1 microvolt to 1.0 volt rms across a 50 ohm load, and the accuracy shall be within ± 1dB of the
indicated value.
3.1.8.1 Standing wave ratio (SWR). The SWR of the rf output level shall be less than
1.2.
3.1.9 Output attenuation. The output attenuation range shall be at least l30 dB, with an
additional l0 dB controlled by a vernier that is calibrated in l dB steps. The vernier shall have an
accuracy of ± 0.2dB or better.
3.1.10 Output impedance. The output impedance of the equipment shall be 50 ohms.
3.1.11 Input impedance. The input impedance of the equipment shall be 600 ohms.
3.2 Qualification. The equipment shall be constructed from parts and materials that shall
provide high reliability under varying operational environments, ease of operation, and
ruggedness. Radioactive materials (e.g. luminous dial/markings, lenses, etc.)shall not be used in
the manufacture/construction of the equipment (see 6.2).
3.2.1 Safety. Unless otherwise specified, the equipment shall be designed and built to
best commercial practices for electronic test equipment. Operating and maintenance personnel
shall be protected from mechanical and electrical hazards by insuring that the equipment is
properly shielded, marked, grounded and designed to prevent accidental contact with moving
mechanical parts, such as fans and gears.
3.2.1.1 Shock protection. The equipment shall provide protection from HF voltages or
currents that are capable of causing burns. Shock protection shall be provided if the open circuit
voltage between any accessible part of the test equipment and ground, or any other accessible
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