- DIY Transceivers
- Yaesu System Fusion
- Building a MMDVM Repeater
- Digital Hardware
- Codeplugs
- Reflectors
- ALE - Automatic Link Establishment
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Related Pages:
- Anytine AT D868
- MMDVM_HS_Dual_Hat_Duplex
- Radioddity OpenGD77
- MMDVM-Mutli-Mode-Digital-Voice-Modem
- Digital-Modes/Pi-Star/Pi-Star.html
- Digital Mobile Radio (DMR)
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2. NBEMS - Narrow Band Emergency Messaging Software
Narrow Band Emergency Messaging Software (NBEMS) is an Open Source software suite that
allows amateur radio operators to reliably send and receive data using nearly any computer
(Windows, Mac, and Linux) and any analog radio without requiring a dedicated digital
infrastructure or specialized modem hardware.
NBEMS uses the FLDIGI suite of software routines that emulate the hardware modem, compute
the error correction and format many standard message forms (to include ICS forms).
FLDIGI emulates many modems for different applications; we use the MT-63-2KL for UHF/VHF
messaging. NBEMS works with Windows, Linux and Mac computers and can be used on HF too.
There is even an Android app.
Narrow Band Emergency Messaging System
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3. Digital Voice
- Voice Encoding and Decoding Systems
- P25 Phase 1 - Widely deployed radio standard used in public safety and amateur radio.
- ProVoice - EDACS Digital voice format used by public safety and amateur radio.
- X2-TDMA - Two slot TDMA system currently being deployed by several public safety organizations.
Based on the DMR standard with extensions for P25 style signaling. - DMR/MOTOTRBO - "Digital Mobile Radio" Eurpoean two slot TDMA standard. MOTOTRBO is a popular
implementation of this standard. - NXDN - Digital radio standard used by NEXEDGE and IDAS brands. Supports both 9600 baud (12.5 kHz)
and 4800 baud (6.25 kHz) digital voice. - D-STAR (AMBE Vocoder based)- Digital Smart Technologies for Amateur Radio developed by the
Japan Amateur Radio League (JARL) in the late 1990's. - P25 Phase 2 - This is not yet a published standard. Phase 2 will use a vocoder supported by mbelib.
- OpenSKY - It is possible that the four slot version uses a vocoder supported by mbelib.
The two slot version does not. - C4FM - Continuous envelope 2 or 4 level FSK with relatively sharp transitions between symbols.
Used by most P25 systems. - GFSK - Continuous envelope 2 or 4 level FSK with a narrower Gaussian/"raised cosine" filter that
affects transitions between symbols. Used by DMR/MOTOTRBO, NXDN and many others.
Noisy C4FM signals may be detected as GFSK - QPSK - Quadrature Phase Shift Keying (and variants) used in some P25 systems and all known X2-TDMA
systems. May be advertised under the marketing term "LSM"
10.0 Digital Voice Codecs
AMBE codec etc., as you might expect, has been tried up by the big boys, but it seems there are some attempts at amateur decoding.
KB9MWR Blogspot - 2010 article "An AMBE open source compatible codec?"
Radio Reference - Digital Speech Decoder (software package)
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For Digital Voice (DV), there are four applications that have been used for transmitting digital voice on the amateur bands
- WinDRM,
- DRMDV,
- FDMDV (AMBE Vocoder based), and
- FreeDV (Codec2 Vocoder based).
Wikipedia - Time-division multiple access
Jared Szechy - Digital Speech Decoder
Jared Szechy's DSD package is able to decode several digital voice formats from a discriminator tap audio and synthesize the decoded speech. Speech synthesis (encoding) requires mbelib, which is a separate package.
DSD github download of dsd-1.7.0-dev
DSD Build Instructions
DSD Supported Formats
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Hotspots - standalone digital radio IP gateways
DV Dongle
encoding and decoding of compressed audio using the DVSI AMBE2000 full
duplex vocoder DSP chip.
DV4mini
DV4mini just acts as an Internet gateway (hotspot).
The Internet networks that it can access are various, and depend on the system used (eg C4FM Fusion),
but it can't directly go onto Yaesu's Wires-X network as their gateways (hotspots) are their own boxes that have to be individually subscribed to them.
The DV4mini can bridge networks, so for example I've had my DV4 mini on the FSC0001 network and talking to our 70cm repeater on the Wires-x network (as I'm near enough to the repeater).
Some others have permanently bridged networks using a similar technique.
There is also a version of the DV4mini with the AMBE chip piggybacked so you can use it with a microphone / speakers directly.
There are also lots of other products doing similar things - like openspot I think.
http://www.wavecom.ch/content/pdf/advanced_protocol_dmr.pdf Helitron DV4mini USB stick installation and setup
DVMega - RPi Shield
www.gigaparts.com/dv-mega-dual-band-radio-raspberry-pi
SharkRF's OpenSPOT
Supports DMR (Brhttp://www.wavecom.ch/content/pdf/advanced_protocol_dmr.pdfandmeister, DMRplus), D-Star (DCS, REF/DPlus, XRF/DExtra, XLX),
System Fusion (FCS, YSF Reflector) networks. SharkRF's OpenSPOT
Nano Spot by Micro-Node International
Jumbospot.html
NANO-SPOT is a chttp://www.wavecom.ch/content/pdf/advanced_protocol_dmr.pdfompletely self-contained digital hotspot supporting DMR, Dstar, P25 and System Fusion communications. Fully assembled and tested in a ruggedized extruded aluminum enclosure. All that's required for operation is a power source and a WiFi based internet connection. Pi-Star Digital Voice Software pre-loaded and easily upgraded via software.
Micro Node International web site:http://www.micro-node.com/
MMDVM_HS_Hat for the Raspberry Pi Zero
This is the source code of ZUMspot/MMDVM_HS, personal hotspot (ADF7021 version of
the MMDVM firmware), based on Jonathan G4KLX's MMDVM software. This firmware supports
D-Star, DMR, System Fusion, P25 and NXDN digital modes.
This software is intended to be run on STM32F103 microcontroller. Also, Arduino with
3.3 V I/O (Arduino Due and Zero) and Teensy (3.1, 3.2, 3.5 or 3.6) are supported.
You can build this code using Arduino IDE with Roger Clark's STM32duino package, or
using command line tools with ARM GCC tools. The preferred method under Windows is
using STM32duino, and under Linux or macOS (command line) is using STM32F10X_Lib.
juribeparada/MMDVM_HS - Firmware for ZUMspot / MMDVM_HS (D-Star, DMR, YSF, P25 and NXDN)
This project provides a Raspberry Pi Hat for the MMDVM_HS Hotspot. It was designed
for the Raspberry Pi Zero, but should work on any other Pi with the Hat interface.
mathisschmieder/MMDVM_HS_Hat - MMDVM_HS Hat for the Raspberry Pi (Zero)"
ZUMSpot Libre Kits - No Longer Available
MMDVM May 8, 2017 · Ready to Ship the ZUMSpot Libre Kits by Bruce Given. Has the ST Link and the Blue pills all programmed with Boot loaders and MMDVM code so all you have to do is solder it together and plug it into a MMDVMhost... Send a email ve2gzi@gmail.com and we will get them out the door this week.
The source code is available for download athttps://drive.google.com/open?id=0BybZQQXhvF7Ka2JfTnhKYVk5bW8
A Video about the construction of the MMDVM Zumspot Libre Kit which is based upon
the "Blue Pill" STM32 controller and all assembled upon an adapter board.
https://www.youtube.com/watch?v=fzaPVyr-jzY
MMDVM Hotspot Duplex - Repeater Board
This is the MMDVM hotspot duplex version.
Also more currenhttp://www.wavecom.ch/content/pdf/advanced_protocol_dmr.pdft details are available on bi7jta's Blog:
http://mmdvm.bi7jta.org/2018/04/about-nano-mmdvm-repeater-kit-board.html
https://www.youtube.com/watch?v=t2DcaxduCs4
Pi-Star - A web Based Digital Voice Dashboard and Configuration Tool
Pi-Star is a web based digital voice dashboard and configuration tool written by
Andrew Taylor MW0MWZ, and in the format of a custom, pre-configured SD Card image
for the Raspbperry Pi and other ARM based single board computers.
Andy's web site is www.mw0mwz.co.uk
Pi-Star can be downloaded here:
www.pistar.uk/downloads.
Digital SSTV Encoders/Decoder
KG-STV is a new, completely different digital SSTV system solely for transmitting and receiving pictures similar to analogue SSTV.John Wells M5AML- Digital SSTV
The seven digit Call Connection Service
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https://ceworkbench.wordpress.com/2015/04/06/an-improved-classie-wspr-controller/Theory of Single tone detection with the Goertzel algorithm
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Yaesu System Fusion
C4FM-FUsion is a system developed by YAESU. It is based like DMR on 4FSK, and also
transmits 4 frequencies with a total data rate of 9600 bits/s. It uses the same AMBE+
Codec as DMR, but needs only 3600 bits/s. The extra bits are used in C4FM-Fusion in a
different ways. They can be used for data transfer (e.g. GPS) but also for additional
error correction to make the speech more stable during interference. There is also a
mode for high speech quality which uses all bits for speech only.
gr-ysf is a collection of GNU Radio Modules to decode Yaesu System Fusion (YSF) C4FM packets.
https://hb9uf.github.io/gr-ysf/
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Building a MMDVM Repeater
http://digiham.boards.net/thread/13/dmr-repeaterhttps://www.youtube.com/watch?v=hx84zLWYzCI&t=63s Repeater-Builder.com manufacture a MMDVM shield for the RPi. Their site is:
www.repeater-builder.com/products/stm32-dvm.html - Repeater Builder
The latest firmware for the Repeater Builder can be found here:
http://dvswitch.org/files/HAM/MMDVM/
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Digital Hardware
Baofeng DM-R5 Handheld Radio
Baofeng DM-R5 Manual DownloadBaofeng DM-R5 Software Download
Radioddity Baofeng RD-5R DMR
Radioddity-GD-77-Dual-Band-Dual-Time-Slot-V-UHF-DMR-1024CH- DMR Radio
Rocky Mountain Radio - Baofeng-DM-R5-test-results
Baofeng DM-5R Buyer Beware
Radioddity GD77
Radioddity GD77https://www.radioddity.com/downloads/ - Radioditty Download page
AnytoneAT-D868UV Dual Band DMR Radio
http://www.wouxun.us/category.php?category_id=83 = Wouxun.US Download page[Top][Home]
Motorola DR3000 Repeater
The Motorola DR3000 is a $5,000 repeater. It has trunking capabilities. Motorola salesperson recommend looking at Hytera or even better a Vertex EVX-R70 at about $3000. Apparently they are hard find them since Motorola has dominated the market.
Tytera TYT MD-8500
GB3GR MD-8500 DMR Repeater"
Internally the system appears to have been made from two 70cm stock TYT Mobile radio units TH-9000D modified to become one RX and one TX. There is a custom built control mechanism which utilizes an ARM processor with two audio/digital processing chips. There is at present no way to change the firmware that controls the repeater. The Tytera TYT MD-8500 UHF 400-470MHz DMR Digital & Analog repeater is available from Aliexpress.
Tytera TYT MD-8500 UHF 400-470MHz DMR Digital and Analog Repeater
The suppliers is TYT:
http://www.tyt888.com/?mod=product_show&id=72
Front View and internal views of the MD-8500 DMR Repeater consists of HR-9000D Radios and a Logic control box.
DMR Repeater Under side view shows duplexer and control logic box
Overview of Adaptive TDMA
Codeplugs
Building a Amateur radio DMR contacts listGD77-codeplug-master
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Reflectors
Australian DMR Reflectors - VKDMR
Dashboard Reflector - RepeatersDashboard Reflector - Hotspots
D-Star Reflectors
Reflector - dcs014.xreflector.net/index.phpTo list the latest list of activity for Queensland"
A reflector can be considered to be similar to a repeater, but with no RF capabilities. Reflectors are Internet connected servers, generally in datacentres, which receive a transmission from a connected gateway (via the Internet) and send it out to all other connected gateways for retransmission, via RF in the case of a repeater. The term gateway is used in the broader sense, which includes devices such as dongles and DVAPs (See Diagram below).
Source: http://www.dstar.org.au/about/reflectors/
An example of an Australian XLX reflector is the "DCS014 (XLX014) Multiprotocol Reflector and Gateway".
It can be found here: dcs014.xreflector.net - The Australian Reflector
"XLX AMBE Reflector"
The XLX AMBE is a server running on debian linux. It runs as a daemon service.
The software is available from github and operates on several network.
The XLX Multiprotocol Gateway Reflector Server
It requires apach2 web server, php, and g++.
The software looks pretty simple to install. The hardware hookup may be another matter.
Also would chew the bandwidth if it became a popular reflector.
The ports it uses tells a lot about it. Hopefully, it support transcoding between all protocols, though I seriously doubt it …
XLX Server requires the following ports to be open and forwarded properly for in- and outgoing network traffic:
TCP port 80 (http) optional TCP port 443 (https) TCP port 8080 (RepNet) optional UDP port 10001 (json interface XLX Core) UDP port 10002 (XLX interlink) TCP port 22 (ssh) optional TCP port 10022 UDP port 30001 (DExtra protocol) UPD port 20001 (DPlus protocol) UDP port 30051 (DCS protocol) UDP port 8880 (DMR+ DMO mode) UDP port 62030 (MMDVM protocol) UDP port 10100 (AMBE controller port) UDP port 10101 - 10199 (AMBE transcoding port)
The Brandmeister Reflector Network
BrandMaster/BrandMeister is an operating software for Master servers participating in a worldwide infrastructure network of amateur radio digital voice systems. BrandMeister allows you to connect to MOTOROLA DMR-MARC and Hytera DMRplus networks this means you operate on both infrastructures the same time.
wiki.brandmeister.network/index.php/What_is_BrandMeister - What is BrandMeister
The UK Reflector - CQ-UK
The CQ-UK group provide links to FM, C4FM, DMR and D-STAR to allows all modes to be able
communicate with the other in one place regardless of Repeater access or equipment owned.
Thanks to the hard work of MI5DAW Rickie, GM7KBK Ernie DMR C4FM and D-star can now
communicate together thru the CQ-UK room.
CQ UK's C4FM Fusion reflector is named CQ-UK and has a dtmf node id of (27793)
Rickie MI5DAW hosts an XLX925 reflector with extensive digitallinking from his home
here in Belfast and maintains a web site www.mi5daw.com
He has two modules going A and B and further plans to create more Modules and linking.
At the moment the xlx925 runs A module and xlx922/xlx925 run B module.
D-Star ircddb
http://status.ircddb.net/repeater.php?ctry=AUShttp://www.pa7lim.nl/ircddbremote/
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ALE - Automatic Link Establishment
Automatic Link Establishment, commonly known as ALE, is the worldwide de facto
standard for digitally initiating and sustaining HF radio communications.
ALE is a feature in an HF communications radio transceiver system that enables
the radio station to make contact, or initiate a circuit, between itself and
another HF radio station or network of stations. The purpose is to provide a
reliable rapid method of calling and connecting during constantly changing HF
ionospheric propagation, reception interference, and shared spectrum use of busy
or congested HF channels.
A standalone ALE radio combines an HF SSB radio transceiver with an internal
microprocessor and MFSK modem.
HFLINK - Home of Automatic Link Establishment
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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20180510 - pre published v1.0