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CAP3001A Datasheet(PDF) 6 Page - Micronas |
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CAP3001A Datasheet(HTML) 6 Page - Micronas |
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6 / 37 page  CAP 3001 A MICRONAS INTERMETALL 6 2.1.4. Operating Modes The CAP 3001 A possesses 4 main operating modes: 1) MPX-mode In this mode, the CAP 3001 A receives the multiplex sig- nal of an FM transmission, containing sum and differ- ence channel, the pilot tone and the signals needed for travel information (ARI, RDS). The FM-demodulation has to take place inside the conventional tuner. The mix- ing of the difference band is done by an analog mixer in front of the A/D-converters in order to achieve the neces- sary quality for FM stereo. The ARI and RDS signals and the pilot tone are extracted digitally. 2) AF-mode In this mode the CAP 3001 A works transparently; the in- coming signals are only A/D-converted and then trans- mitted to the DSP core. 3) XDS-mode In this mode there is an external digital source (XDS, e.g. a CD player) which sends its digital data to the CAP 3001 A for further processing and for the reconverting to ana- log signals. The CAP 3001 A can be adapted to the sam- pling rate prescribed by the external digital source; in addition the input systems of the CAP 3001 A remain ac- tive in order to monitor the traffic information (ARI/RDS). 4) AM-IF mode In this mode, the CAP 3001 A receives input signals in the AM-IF range (i.e. 450 to 460 kHz). By a special ana- log mixer in front of the A/D conversion, the AM signal is mixed down to a frequency of 19 kHz. AM mono and ste- reo (C-QUAM) are demodulated in the DSP software. CAP 3001 A FM FM Tuner IF AM Tuner & IF AMIF MPX FMLEVEL FMTUNOUT FMOSCIN AMOSCIN AMTUNOUT µController Fig. 2–2: CAP 3001 A system overview LF LR RF RR |
Número de pieza similar - CAP3001A |
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Descripción similar - CAP3001A |
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