Murray Greenman CSc ZL1BPU/ZL1EE
Waiuku, Franklin New Zealand [RF72is]

This web site is mostly about new, different, and specialized radio communication modes. The emphasis is on modes which I have influenced in some way during development. There are digital chat modes and visually readable modes for LF, HF and VHF.

There is also a section on propagation studies, and some fascinating micro-controller projects to build. The site also hosts Amateur PC software developed by Con Wassilieff ZL2AFP/ZL2EE.

New MEPT Transmitter page: http://www.qsl.net/PROJ/mept.htm

- CMSK for LF/MF -

LF/MF CMSK reception
A specialized weak signal system for the lower phase stable bands (2200m, 600m and 160m), where QRN and man-made interference are the biggest problems. This is a sophisticated high performance narrow-band DX system.
Introduction

- Fuzzy Modes -

Hellschreiber reception
The modes described here are visually readable, rather than interpreted by electronics or computer. Although some of the modes are new, the idea isn't, and all are fascinating. This is the acknowledged premier site for Hellschreiber techniques.
Introduction     Feld-Hell     PSK- & FM-Hell     MT-Hell

- MFSK Modes -

A robust multi-tone FSK mode
Most of these modes are for conversation between two or more Amateurs. The emphasis is on performance, especially with low power or under poor radio conditions. This is the official source of MFSK16, DominoEX and WSQ documentation.
Introduction     MFSK16     DominoEX     WSQ     MEPT-JT

- NBTV Modes -

ZL2AFP NBTV modes
Narrow Band TV is similar to SSTV, except that sequential frames are transmitted, and the emphasis is generally on speed (in order to provide realistic motion) rather than image resolution. Several different and highly successful full colour modes are presented.
Introduction     Analog OFDM NBTV     Digital NBTV     Hybrid FM NBTV

- The Ionosphere -

Peter G3PLX's Chorp Sounding
An extensive introduction to ionospheric propagation. A small collection of techniques and ideas to assist understanding and monitoring of ionospheric propagation. The techniques include passive chirp sounding, PN ranging, narrow-band digital and carrier frequency Doppler analysis.
Introduction     Chirp Sounding     Precision Carrier Analysis     Ranging Techniques     Digital Propagation Logging

- Software -

ZL2AFP and Zl1BPU software
Here you will find the most complete collection of radio software from Con ZL2AFP, including CMSK, DominoEX, the Narrow Band TV modes, and a collection of useful utilities. There is also a selection of utilities by Murray ZL1BPU.
Introduction     Clicklock     CMSK for LF/MF     DominoEX     MSK-Hell for LF/MF     Narrow Band TV     PSK Sounder

- Micro Projects -

ZL1BPU Micro Controller Projects
A range of projects based on ATMEL AVR processors. Projects including a rotator controller, signal generators, clocks and references, frequency counters and transmitters.
Introduction     Test Equipment     Signal Generators     Amateur Radio     Time & Frequency     How to Order

- Other Projects -

Adaptations for surplus high stability Rb references; recycling crystal-controlled HF SSB radios for Amateur bands; transmissions for investigating radio propagation.
Rubidium Synthesizers     Recycled Radios     ZL1EE MEPT Transmitters
QR code http://www.qsl.net/zl1bpu/

- Documents and Publications -

Selected Amateur Radio related documents by ZL1BPU.

To visit any of these areas, click on the titles, links or pictures.


Copyright Murray Greenman 1997-2014. All rights reserved. Contact the author before using any of this material.

These pages have been written using a simple text editor, for minimum file size and maximum speed.
I believe web pages should be simple, clear, quick to load and easy to use. For bells and whistles look elsewhere.
Most recent update 19th August 2014.

My thanks to the folks at QSL.NET for hosting my stuff.