DominoEX - NVIS Chat Mode
This is a narrow-band chat mode designed for use on low HF bands under NVIS conditions. Sensitivity is very good, and the mode is by design immune to mistuning and drift. It is also tolerant of severe Doppler and multipath propagation problems.
- DominoEX is very robust, and gives excellent reception even without optional FEC.
- DominoEX is easy to tune, and so ideal for digital mode beginners.
- DominoEX is fast and slick to operate, so excellent for old hands as well.
MSK - Narrow Band modes for LF
A collection of experimental programs exploiting Minimum Shift keying, and especially suited to LF operation. A linear transmitter is NOT required!
- Separate transmitter and receiver - full duplex capability.
- PSK31 style varicode for maximum efficiency.
- FEC version for reduced error rates.
- Speeds from 31.25 to 500 bps.
CLICKLOCK - carrier synchronous reception on LF
An amazing program which offers the ability to coherently receive and integrate highly stable signals (preferably UTC referred or GPS locked). Offers sensitivity unrivalled using other techniques. Phase lock includes all sound card and receiver oscillator offsets.PSK Sounder - PN sequence sounder for HF
Using techniques borrowed from STANAG 4285, PSK Sounder is able to measure ionospheric propagation in real timeMEPT Tools - tools for weak signal work
Two useful utilities are offered. Grid Map allows you to show (from your WSPR log) where in the world you have been receiving signals from. VMEPT Controller allows pre-recorded .WAV files to be used to transmit narrow-band visual MEPT signals using a time schedule.
It is of course impossible to transmit conventional wideband TV on HF, and within a 2kHz bandwidth it is very difficult to achieve anything like reasonable resolution, let alone true motion or colour! Most narrow-band TV (NBTV) has in the past been SSTV style (FM single frames) or AM modes that are too wide for SSB. The ZL2AFP FFT TV technique solves these problems, by using a multi-carrier OFDM transmitter with one carrier per TV line, no sync, extra carriers or fields for compressed colour information, and viewer programs for full motion replay of recorded transmissions.Several modes are offered, with low resolution and high resolution modes in black and white and colour, plus a special VHF mode.