B KY 96A, KY 97A
Rev 5, Apr 2003 MM 006-05674-0005.dwd Page 5-8
350 Hz = ___NMT 6dB down 1 kHz = ___ 0 2.5 kHz = ___NMT 6dB down
Input a standard modulator signal, except voltage is 0.2 Vrms, into Mic Audio.
Monitor the audio output.
5.3.3.B.5 Demodulated Audio Response:
350 Hz = ___NMT 6dB down 1 kHz = ___ 0 2.5 kHz = ___NMT 6dB down
Input a standard modulator signal, except voltage is 0.2 Vrms, into Mic Audio.
Observe the demodulated RF output from the linear detector on an audio watt-
meter.
5.3.3.C. Frequency Stability: ______ NMT +/- 200 Hz
Measured after 2 hours “OFF” period.
5.3.4 Audio Amplifier
5.3.4.A. Mute: ______ NLT 40 dB down
With the volume control at minimum and a 1 kHz 4.47 V audio signal applied
to AUX1 audio input when the PTT input is NMT + 0.5 volts.
5.3.4.B. Audio Output Power:
5.3.4.B.1 Comm ______ (4 W min/ 13.75 V unit, 8 W min/ 27.5 V unit)
Insert a 100 uV RF carrier modulated 30% at 1 kHz into the unit. Monitor the
4 ohm audio output.
5.3.4.B.2 Aux1 ______ (4 W min/ 13.75 V unit, 8 W min/ 27.5 V unit)
Insert a 1 kHz 4.47 V (40 mW @ 500 ohms) for 27.5 V units, 3.16 V (20 mW
@ 500 ohms) for 13.75 V units, audio signal into the Aux1 input. With the vol-
ume control at minimum, monitor the 4 ohm audio output.
5.3.4.B.3 Aux2 ______ (4 W min/ 13.75 V unit, 8 W min/ 27.5 V unit)
Insert a 1 kHz 4.47 V (40 mW @ 500 ohms) for 27.5 V units, 3.16 V (20 mW
@ 500 ohms) for 13.75 V units, audio signal into the Aux2 input. With the vol-
ume control at minimum, monitor the 4 ohm audio output.
5.3.4.B.4 Aux3 ______ (4 W min/ 13.75 V unit, 8 W min/ 27.5 V unit)
Insert a 1 kHz 4.47 V (40 mW @ 500 ohms) for 27.5 V units, 3.16 V (20 mW
@ 500 ohms) for 13.75 V units, audio signal into the Aux3 input. With the vol-
ume control at minimum, monitor the 4 ohm audio output.
5.3.4.C. Quieting: S+N/N ______ dB (NLT 25 dB)
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