I am developing a software dualport packet radio tnc that uses a soundcard as a modem and supports ax. The soundmodem has two tcpip interfaces to link with client application. It can also be used with other software for aprs, bbs, satellite packet, and regular packet work. So all software that requires a serial interface can be used with this modem setup configure the packet mode by selecting mode settings.
The tigertronics design employs surface mount technology which permits the use of robotic assembly, resulting in a vastly smaller unit with enhanced reliability and lower cost. The picpar is supported by at least dos, windows9598nt, and linux. There is even a modem disconnect header for installing other modems. It has been tested on windows xp, vista, 7, 8, 10 and has proved stable in operation. I figured why not test some 9600 baud packet using this setup. Fsk9600 baud is frequently used on the uhf bands and uses frequency. Tnc7multi is een intelligente packet modem of wel een terminal mode controller tnc. Versatility in modems the 9600 1200 bps pk96 comes with 1200 bps afsk tone signaling, as well as 9600 bps k9ng and g3ruh compatible direct frequency modulation, making it a truly high performance data controller. Programs that support 9600 baud packet will show bp96 instead of or in addition to the mode number. Since a typical nbfm radio has an unfiltered response from zero to some 8 khz, transmission of 9600 baud binary data is perfectly possible through it. Configure for 9600 baud packet and kiss emulation in the following way. The 2400 baud agwpe modem is compatible with a tcm3105 modem chip modified with a 8mhz crystal for the modem clock and uses a 2165 and 3970 hz tone pair.
The bp96a is an enhanced version of the baycom teams picpar modem, which is sold in germany as a kit. Modem issue 3 as simulated using microcap iv circuit analysis software. The theoretical minimum audio bandwidth required to send 9600 baud binary data is 4800 hz. Voor gebruik aan een computer met software is dit geen probleem, maar. Mixw will emulate a kiss tnc via a virtual null modem connection. The software and protocols are either available or in the works. Uz7ho develops a software dualport packetradio tnc that uses a soundcard as a modem and supports ax. Soundmodem is compatible with all programs that work with the agw packet engine agwpe. The kd2bd 9600 baud modem is a lowcost, highperformance 9600 bit per second fsk frequency shift keying modem designed to interface between a standard packet radio terminal node controller tnc and an fm voice transmitter and receiver.
891 1571 1146 1268 873 1140 1121 126 1238 1507 158 587 959 1589 203 409 1554 529 852 1172 1058 1422 351 1304 1383 990 102 985 171 520 417 805 803 837 952 1384 566 210