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DV3000 in Japan – Portable DummyRepeater

Note from our new friend Satoru, JA1SCW, on Olive Island in Japan
PortableDR

Portable DummyRepeater

Since I started D-Star about two years ago, I have been looking for a solution for a portable rig like the photo which consists of Raspberry Pi, DV3000, sound card, software, WiFi, battery and smartphone. You may use them as a friend of your daily exercise, walking!!I made hotspots and node adapters in total six to seven sets, but this is the very first ever set which is capable for accessing the networks supported by ircDDBgateway software. At this moment of time, only remaining issue is PTT as I prefer PTTing by using a speaker-mic rather than hitting a PTT button on a smartphone screen.I will be soon 70 years young! hi This requires skills for a soldering and programming but hope everybody could overcome difficulties you may be faced to. Thanks to a great product, DV3000 and people contributed for launching it.Very best 73s,  JA1SCW@ Olive Island in JapanThanks,  Satoru (Radio Name: Steve)

Update

GPIO PTT

Photo of Portable DummyRepeater w/PTT

Based on information from G8BPQ, Saturo was able to simplify the Portable DummyRepeater and remove the external USB hub which supported a serial connector to get PTT.  Now his PTT goes directly to Pin 3 on the Raspberry Pi.

DummyRepeaterDV3000-2

Block Diagram

 

DR-DV3000

Portable Dummy Repeater with DV3000

DV3000 Analog to D-STAR Bridge

VK5ZEA, Michael, of Port Lincoln, Australia treats us to another of his wonderful YouTube videos.

Using a Raspberry Pi, DMK URI, DummyRepeater and analog radio, Michael demonstrates bridging analog FM and D-STAR.

Preparing the Raspberry Pi for DV3000 Applications

See the basic installation instructions for the DV3000 and the dv3000d daemon in the document DV3000 – AMBEServer

Note: All production DV3000 units are configured for 230400 bps and do not have jumpers. 115200 bps is insufficient, but the board can be easily modified to add jumpers to configure baud rate, see the schematic at in the datasheet.

The dv3000d is the basic building block for the first set of applications for the DV3000.  It is a server which receives PCM audio over a UDP socket and returns AMBE or receives AMBE and returns audio.

DummyRepeater from the Yahoo! pcrepeatercontroller forum can access the daemon either locally or over a UDP/IP link. DummyRepeater in conjunction with ircDDBGateway will allow you to link to reflectors and repeaters around the world.  See notes.

You will also find utilities to convert between ‘wav’ and ‘dvtool’ or ‘ambe’ files in the ircDDBGateway file AMBETools.

 

UDR56k becomes UDRX

Press Release
Friday Harbor, WA

NW Digital Radio

Universal Digital Radio Name Change to UDRX-440

NW Digital Radio has renamed it’s forthcoming digital radio platform. Since its inception, the Universal Digital Radio was designed to be a multi-application, multi-protocol, and multi-mode digital radio platform.

When announced at Hamvention® 2012 , the radio design focused around a high integration “radio on a chip” platform that provided both the RF section as well as integrated modems. The selected device proved to be somewhat limited and did not meet the high expectations of the design team and was later abandoned in favor of a modular design that separates the RF and modem stages.

The new design provides an I/Q interface for detection and modulation of the RF signal. This affords maximum flexibility for a software defined modem system, providing a variety of modulation choices at varying data rates, thus freeing the radio from the fixed modulation and data rate choices of the earlier design.

When the radio was first announced it was targeted to a maximum data rate of 56 kilobits per second, based on available modulation choice and the limitations of the US regulations for amateur radio on the 70 cm band. The model name of UDR56k-4 was chosen to reflect this set of specifications. Now that the design allows for additional modulation choices, higher data rates are available within the specified bandwidth and, along with proposed rule changes before the US Federal Communications Commission, has prompted NW Digital Radio to increase the data rates available on the Universal Digital Radio platform.

The company re-opened the naming of the product, seeking input from its growing user interest group, and has adopted a new naming convention. The first radio design is now designated the UDRX-440. This model is a 430-450 mHz digital radio with integrated software defined modems, protocol engine, and Linux application platform.

NW Digital Radio is currently accepting order commitments from individuals who participated in the Q2-2013 pre-order process.

Confirm

Ordering will be opened to the general amateur community in late Q1 or early Q2-2014 with delivery anticipated in mid to late Q2.

John D. Hays
Director of Marketing