You can download any of my Digital Signal Processing (DSP) programs from the BBS for your own use. Some of the most popular are available here for the asking. Most of these programs require the Sigma-Delta interface (See Jan '92 QST) to connect your radio's audio output to a serial port. These programs run with DOS only. NIAGARA - Audio spectrum analyzer with "waterfall" display FFT - turns your screen into an Audio Spectrum Analyzer FFTZZ - upgrade V2.1 98.12 includes mouse support, BPSK mode COHERENT - v7.7 - recover weak BPSK signals AFRICA - v3.1 - more powerful COHERENT for Pentium computers AFRICAM - v5.4 - AFRICAM supports GPS-disciplined BPSK, FSK SETDOS - sets your DOS clock to exact time using GPS input GENMSG - v1.2 ID generator for C-BPSK, MSK - can make .WAV files CRUNCH - v2.8 - new program for receiving QRS-CW KEYER - a keyer for LF band beacons, supports all COHERENT modes UTILITY - some notes and a Tuning indicator program TONEGEN - plays music-like notes through PC speaker SOUND - Can be used to measure sampling rate of sound card 800HZ.WAV - 30 seconds of 800 Hz at 8000 s/s MSKGEN - simple program to make loopable MSK audio test files SDPCX - Schematic of the S-D interface board