CMX838 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX838' PDF : 71 Pages View PDF
FRS/PMR446/GMRS Family Radio Processor
CMX838
5.1.2.5 AUDIO POWER AND BANDWIDTH CONTROL Register ($83)
TX MOD and
MIC AMPLIFIER
POWER
CONTROL
Bit 7 and Bit 6
These bits are dedicated to power control for the modulation digitally controlled
amplifiers and the microphone amplifier
Bit 7
0
0
Bit 6
0
1
Power level setting
Power down (off)
Normal Operation
AUDIO FILTER
POWER
CONTROL
Bit 5 and Bit 4
These bits are dedicated to power control for the audio filters, the deviation limiter, and
the audio level digitally controlled amplifier
Bit 5
0
0
Bit 4
0
1
Power level setting
Power down (off)
Normal Operation
RX AUDIO OUT
POWER
CONTROL
Bit 3 and Bit 2
These bits are dedicated to power control for the de-emphasis network and the
RX Audio Out digitally controlled amplifier.
Bit 3
0
0
Bit 2
0
1
Power level setting
Power down (off)
Normal Operation
AUDIO
BANDWIDTH
CONTROL
Bit 1
Bit 0
A logic ‘1’ on this bit reduces the –3dB bandwidth of the post deviation limiter low-pass
filter from 3.5kHz to 3.0kHz. The narrow band setting is intended for radio systems with
RF channel bandwidths ≤ 12.5kHz.
Unused, must be set to Logic ‘0’
Table 9: AUDIO POWER AND BANDWIDTH CONTROL Register ($83)
2003 CML Microsystems Plc
34
D/838/8
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