In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

Here is a Bell-202 modulation code (1200 bps FSK output)
[url=http://www.sxlist.com/techref/ubicom/lib/io/dev/modem/simple_fsk_gen_1_03.SRC]http://www.sxlist.com/techref/ubicom/lib/io/dev/modem/simple_fsk_gen_1_03.SRC[/url]
[url=http://www.sxlist.com/images/sxlist/AN7_FSK_gen.PDF]http://www.sxlist.com/images/sxlist/AN7_FSK_gen.PDF[/url]

Here is a Bell-202 demodulation code (1200 bps FSK input)

[url=http://www.sxlist.com/techref/ubicom/lib/io/dev/modem/simple_fsk_rcv_1_10.SRC]http://www.sxlist.com/techref/ubicom/lib/io/dev/modem/simple_fsk_rcv_1_10.SRC[/url]

[url=http://www.sxlist.com/images/sxlist/AN8_fsk_detect.pdf]http://www.sxlist.com/images/sxlist/AN8_fsk_detect.pdf[/url]

 

regards peter

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