Baseband Processor For Mixed Mode Land Mobile Radio
CMX880
1.6 Application Notes
Radio Section
Receive
C4FM
FFSK
Voice+SubAudio
Discriminator
Audio output
input
Rx
SPKR
Demodulator
CMX880
RF
Modulator
output 1
Audio input 1
Audio input 2
Transmit
2-point Tx
Modulator
MIC 1
Modulator
output 2
C4FM
FFSK
Voice+SubAudio
MIC 2
C-Bus
Fast Serial Bus
Parallel
µC Bus
Host
DSP
MicroController
To rest of subsystem
Figure 22 Possible APCO 25 Configuration
ã 2001 Consumer Microcircuits Limited
67
D/880/1