Baseband Signal Processor

17

MX829 PRELIMINARY INFORMATION

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6. Application

The following block diagrams show the possible arrangements for the pre- and de-emphasis required by PAA1382 and

MPT1327 specifications.

PRE-

EMPHASIS 1

PRE-

EMPHASIS 2

MOD

OUT

MIC

IN

MX829

MSK/DTMF

TX

AUDIO

PROCESSOR

Σ

Figure 7: Transmitter Pre-emphasis

Note:

Both pre-emphasis positions shown, as required by the PAA1382 specification. Remove pre-emphasis 2 for the

MPT1327 specification requirement.

DE-

EMPHASIS

AUDIO

OUT

MX829

DEMOD

IN

MSK

RX

AUDIO

PROCESSOR

Figure 8: PAA1382 Receiver De-emphasis

Note:

De-emphasis shown in all paths, as required by the PAA1382 specification.

DE-

EMPHASIS

AUDIO

OUT

MX829

DEMOD

IN

MSK

RX

AUDIO

PROCESSOR

Figure 9: MPT1327 Receiver De-emphasis

Note:

De-emphasis shown in audio path only, as required by the MPT1327 specification.