Jan, You are correct it is 1200 bps FSK, but also half duplex.
In my opinion the 202 in the ARRL handbook will not function very well in a POTS connection. The TX/RX filtering is not adequate. If I remember correctly that example is intended to be used in RF transmissions of high speed RTTY. Duane >First of all the 202 modem is 1200bps FSK modem, >You can find a lot of information in ARRL amateur radio Handbook. >The modified version of 202 modem is used for Ham Radio packet operation. >Jan > > >At 07:59 AM 4/30/99 -0400, you wrote: >>From: "Ian Chapman" <[email protected]> >> >>Hi, >> A friend of mine would like to know about the old data set 202. >>Often called the penny whistle modem. That's FSK 300 bit/sec originating >>and answering frequencies really antique stuff. The older ones had acoustic >>data couplers. Any help I can dig up information for him would be greatly >>appreciated. >> >> Regards Ian. >> >> >> >Janusz Purwin >Xedia Corp >119 Russell St. >Littleton Ma 01460 >Tel 978-952-6000 ext 166 >Fax 978-952-6090 >email; [email protected]
