CMX838 데이터 시트보기 (PDF) - CML Microsystems Plc

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CMX838

FRS/PMR446/GMRS Family Radio Processor

CML Microsystems Plc 

FRS/PMR446/GMRS Family Radio Processor

CMX838

4.1.4 De-emphasis

Figure 10 shows magnitude response for the De-emphasis 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 de-emphasis filter.

10000

4.1.5 Transmit Audio Path

Overall magnitude response for the transmit audio path for wideband and narrowband with pre-emphasis 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 pre-emphasis.

 2003 CML Microsystems Plc

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D/838/8

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