CMX838 View Datasheet(PDF) - CML Microsystems Plc

Part Name

Description

MFG CO.

CMX838

FRS/PMR446/GMRS Family Radio Processor

CML Microsystems Plc 

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FRS/PMR446/GMRS Family Radio Processor

CMX838

5.1.2.4 RX AUDIO LEVEL CONTROL Register ($82)

LIMITER

BYPASS

Bit 7

LOWPASS

FILTER BYPASS

Bit 6

DE-EMPHASIS

BYPASS

Bit 5

RX AUDIO

LEVEL

Bit 4,3,2,1,0

When this bit is a logic ‘1’, the deviation limiter is bypassed.

When this bit is a logic ‘1’, the post deviation limiter low-pass Filter is bypassed.

When this bit is a logic ‘1’, the de-emphasis network is bypassed.

The five least significant bits in this register are used to set the gain/attenuation of the

volume control according to the table below:

43210

00000

00001

00010

00011

00100

00101

00110

00111

01000

01001

01010

01011

01100

01101

01110

01111

10000

10001

10010

10011

10100

10101

10110

10111

11000

11001

11010

11011

11100

11101

11110

11111

Increment Per Step = 1.5dB Steps

Off

-33.0dB

-31.5dB

-30.0dB

-28.5dB

-27.0dB

-25.5dB

-24.0dB

-22.5dB

-21.0dB

-19.5dB

-18.0dB

-16.5dB

-15.0dB

-13.5dB

-12.0dB

-10.5dB

-9.0dB

-7.5dB

-6.0dB

-4.5dB

-3.0dB

-1.5dB

0.0dB

1.5dB

3.0dB

4.5dB

6.0dB

7.5dB

9.0dB

10.5dB

12.0dB

Table 8: RX AUDIO LEVEL CONTROL Register ($82)

 2003 CML Microsystems Plc

33

D/838/8

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