DB829 Datasheet, PDF (17/29 Pages) CML Microcircuits – Low Voltage Operation

Baseband Signal Processor
17
MX829 PRELIMINARY INFORMATION
6. Application
The following block diagrams show the possible arrangements for the pre- and de-emphasis required by PAA1382 and
MPT1327 specifications.
MIC
PRE-
AUDIO
IN
EMPHASIS 1
PROCESSOR
Σ
MOD
OUT
MSK/DTMF
TX
MX829
PRE-
EMPHASIS 2
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.
DEMOD
IN
DE-
EMPHASIS
AUDIO
PROCESSOR
AUDIO
OUT
MX829
MSK
RX
Figure 8: PAA1382 Receiver De-emphasis
Note: De-emphasis shown in all paths, as required by the PAA1382 specification.
DEMOD
IN
AUDIO
PROCESSOR
DE-
EMPHASIS
AUDIO
OUT
MX829
MSK
RX
Figure 9: MPT1327 Receiver De-emphasis
Note: De-emphasis shown in audio path only, as required by the MPT1327 specification.
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