User's Guide

Page 8
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Frequency Response
25 kHz channel spacing The variation in frequency response with reference to a 1 kHz signal
is within +0.5 dB and -1.5 dB across the frequency range 300 to
3400 Hz. The response is also less than -20 dB at 100 Hz and below,
and less than -30 dB at 4 kHz and above.
8.33 kHz channel spacing The variation in frequency response with reference to a 1k Hz signal
is within +0.5 dB and -1.5 dB across the frequency range 350 Hz to
2500 Hz. The response is also less than -10 dB at 100 Hz and below,
and less than -30 dB at 3200 Hz and above.
Distortion
25 kHz channel spacing The total harmonic distortion is less than 5% due to signals with a
modulation depth of 90%, within the frequency range 300 Hz to
3400 Hz.
8.33 kHz channel spacing The total harmonic distortion is less than 5% due to signals with a
modulation depth of 90%, within the frequency range 350 Hz to
2500 Hz.
Residual FM
For a test signal of 1 kHz set at 80% modulation depth applied to the
line input of the transceiver, the unwanted peak frequency modulation
does not exceed ±500 Hz.
VOGAD
AM-Voice The VOGAD has an operational range of 30 dB. The VOGAD can be
disabled.
AM-MSK VOGAD permanently disabled.
Mute
AM-Voice The mute level is set at 15 dB below the average speech line level
setting. The mute can be disabled.
AM-MSK The mute is permanently disabled.
Differential group delay
AM-MSK only There is a 60 µs of differential group delay for signals in the range
1200 to 2400 Hz.
Transceiver Rx Modulation Characteristics
The transceiver Rx modulation characteristics are as follows:
Mode
AM-Voice mode The AM-Voice mode uses Double Side Band (DSB) Amplitude
Modulation (AM) full carrier, emission designator 6K80A3EJN for
25 kHz channels and 5K00A3EJN for 8.33 kHz channels.
AM-MSK The AM-MSK mode uses Double Side Band (DSB) Amplitude
Modulation (AM) full carrier, emission designator 13K0A2DJN.