NEW! 19 Nov 2002 DIGIMIT 2002 - A digital SSB/CW Transmitter for the HF bands

Yet Another 9k6 Modem

Welcome to the YAM modem WWW server.

This site provides information about the YAM modem for packet radio.

 

 

Born in the Summer 1997 as a 9600 bps G3RUH compatible modem, the YAM is a multi-standard modem capable of AFSK 1200 bps and Manchester-FSK 2400 bps operations.

 

The YAM modem integrates all the functions of a packet radio modem and parts of those of implemented in a TNC using only three integrated circuits and interfaces directly to a PC serial port from which it is also powered.

 

The YAM introduces a substantial new in the arena of packet radio modems and is based on a FPGA (Xilinx's Xc5202) which includes a large amount of logice resources allowing a reduced components count and a more compact form factor.

 

The programming of a FPGA, often called "FPGA configuration", is not a permanent operation, like in a PROM memory, but temporary like in a RAM memory. This feature is used to reconfigure the YAM modem and to fastly toggle its operating mode among FSK, FSK/Manchester e AFSK accordingly to the user needs.

The YAM gate array is programmed via the serial port which connects the modem to the PC by means of a software utility which, in few seconds, programs the modem and uploads the required configuration data.

Upgrading to newer modem configurations and versions has never been so simple: you just need to download the latest YAM configuration files right from this server!

 

The YAM modem can be used with most of the packet radio software and drivers for DOS, Windows95 and Linux have been made available by some developers during the last two years.

I would like to thank all of them for their contributions to the success of the YAM project.

 

73 de nico - IV3NWV

IMPORTANT NOTICE: All the documentation and the software here published is in the public domain. All the information, the schematic drawings, the photos and the software found on this site are for personal amateur use only. Any other use, commercial use included, copy and/or redistribution by any means of the material here contained IS NOT ALLOWED without the written permissions from the author.