FRS/PMR446/GMRS Family Radio Processor
15
CMX838 Advance Information
4.1.4 Deemphasis
Figure 10 shows magnitude response for the Deemphasis Filter. This filter precedes the Rx Audio Level
Control and is generally required to process Rx audio.
15
10
5
0
-5
-10
-15
-20
100
1000
Frequency (Hz)
Figure 10: Magnitude response of deemphasis filter.
10000
4.1.5 Transmit Audio Path
Overall magnitude response for the transmit audio path for wideband and narrowband with preemphasis is
shown in Figure 11.
20
WIDE BAND
0
NARROW BAND
-20
-40
-60
-80
100
1000
10000
Frequency (Hz)
Figure 11: Transmit audio path frequency response with preemphasis.
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