MIL-DTL-22442G
6.4.1.1 Multimeter.
a. Digital readout (4-1/2 digits).
b. Direct current (dc) and true RMS alternating current (ac).
c. Ranges: 10 microvolts to 15 volts RMS ac, l to 30 volts dc l/.
d. Accuracy: ±.5 percent.
e. Input impedance: l megohm minimum.
f. Inputs isolated from ground up to 30 volts.
1/ NOTE: A calibrated lock-in amplifier with fixed incremental gain control may be used as a
true RMS ac voltmeter provided all other requirements are met. A range of 10 millivolts to
15 volts is acceptable providing the attenuator maintains calibration under varying loads over the
frequency range.
6.4.1.2 Signal or function generator.
a. Sine wave output.
b. Frequency range: 100 to 6000 Hz minimum.
c. Frequency accuracy and flatness at full output: ±2 percent.
d. Harmonic distortion: Less than -65 dB (relative to fundamental) at full output for each
frequency.
e. dc offset: 1 millivolts maximum.
f. Voltage range: 1 millivolts to 15 volts 2/.
g. Output isolated from ground up to 30 volts.
2/ NOTE: An amplifier may be used providing the function generator plus amplifier
combination meets the above specifications.
6.4.1.3 Spectrum analyzer (optional).
a. Frequency range: 100 to 6000 Hz.
b. Center frequency accuracy: ±.003 percent.
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