Wednesday, 31 May 2017

Monday night net - TG 3027 on Timeslot 1

Hello everyone,

There is a new DMR Net that is held every Monday from 8 to 10 PM on Brandmeister TG 3027 (BM Quebec). It is also being live streamed via the 'Radio Amateur Quebec' Facebook

Is it hosted by Donald VE2BLT and Benoit VE2VB and is a round table discussion with a few different subjects every week.

Since the repeater is not very busy at night, Jean-Sebastien (can-trbo admin) has allowed BM 3027 on TS1 on a Push to Talk basis for the purpose of monitoring the net from the VE2RCM repeater.

73s from VE2FXO

Tuesday, 11 April 2017

KB5RAB system image for Raspberry Pi 3

Good day to all,

I will be trying out a few operating system images with the Raspberry Pi 3 in the next few days.

The first custom made image I will try out is the one by KB5RAB, which has a bunch of amateur software pre-installed on it, including the MD-380 Tools package.

Here is the link to get the image, a 16 gig SD card is required for imaging it properly:
https://spaces.hightail.com/space/se06G/files

Filename is: KB5RAB_8gb_YSF_pixel_031817.zip

Here below are the release notes for this version of the image, along with everything that is included.
The Image supports DMR, DSTAR and Fusion and each mode can be enabled as desired.
Based off W1MSG Pi 3 Jessie Image. and includes the following: Now includes PIXEL Desktop.
MMDVMHost runs as a service and is set to auto start. Bluetooth disabled to allow DVMEGA to work on Pi GPIO pins and internal WIFI to function on a Pi3 . All log files needed from MMDVMHost, ircDDBgateway and YSFGateway to allow the dashboard to function are written to RAM disk.
Image may be updated periodically to contain the latest versions of the added software. I will keep the current link to the image in this file on BM3148 Facebook group.

Saturday, 1 April 2017


Motorola MTR2000 UHF Repeater Dstar Project



Hello Everyone

        Wanted to let all of you know that soon The VE2RMP Radio Group will have a new D-star repeater on 448.625- to replace the MSF-5000 Motorola D-star repeater.

       The MTR2000 is a much improved unit  and is a everything in one package repeater. Before I go any further I have to say a big thank you to Claude VE2YI our president for supplying the repeater.

       Well I brought the repeater home and installed the programming software on an old dell P4 running windows XP. I made up my own programming cable using a db -9 connector at one end and a RJ-45 at the other. It only uses 3 Wires and is very easy to get the information on the internet. I then of course used a USB to serial adaptor as it is very hard to find computers today with a serial port unless it has been added.
                                                                                                                                                                                   Here is cable I built for programming.


Once this was done you take off the front plate of the repeater to expose the MIC-RSS plugs.


       This where the programming cables goes.




        Now that this is done the fun begins with the software.  There are many things in the software to change and there are so many utilities for alignment and verification. I found

a lot of information on the internet and some I just used common sense as I have been around Claude for quite some time helping him at the repeater sites so there many things you pick up without realizing it.

            Once this is done the only thing left is to take an old mouse cable with the 6 pin din plug on one end and wire it up to the dvptr-1 board.

Pin 1 = Output Audio from the DVRPTR-1 Board

Pin 2 = Ground

Pin 3 = PTT

Pin 4 = input from the FM Demodulator ( Audio coming out of MRT2000)



Once you have indentified these wires then the MTR2000 has a 96 Pin plug in the back  3 rows of 32 . Each pin has a function and again all this information can be found on the internet. I then took stiff wire and soldered small pieces to the 4 wires in question and inserted them into the correct pins on the back.

The computer and software used is a small Beagle Bone Black running an image from Ramish VA3UV who offers his help and support whenever needed. The software work very well and allows for Identifier of the repeater and scheduling  for automatically connecting to reflectors for nets at specific times.


Here is a photo of the DVRPTR-1 Board and the Beagle Bone black Underneath.







The repeater at the moment is operating at my house as VE2YUU  on 442.050 Plus for testing and Hopefully in the next 2 to 3 weeks will be placed up at Ridgewood  as VA2RMP  frequency   448.625 minus.

Here is the MTR2000 with the cover back and on the air.  The repeater is linked to XRF005B  so come on and test it I will be listening.




This has been a fun project and I want to thank Claude VE2YI for supplying the repeater and Ramish for all his support over the years when I have had questions and needed assistance.

Hopefully the next project will be with a MTR2000 and a MMDVM Board and a Raspberry PI-3  this will make a repeater that will do  D-Star - Fusion (C4FM)  - DMR and P25



Take Care and 73 from Cliff VE2YU


Tuesday, 28 February 2017


Time Slot Two

Talk Group
Description
Activate
2
Local/Montreal Region
Always On
8
Regional (Future)
Always On
9
Reflector (Local for Now)
Always On
3020
Newfoundland / PEI
User Activated
3021
Nova Scotia
User Activated
3022
Quebec
User Activated
3023
Ontario
User Activated



3024
Manitoba
User Activated
3025
Saskatchewan
User Activated
3026
Alberta
User Activated
3027
British Columbia
User Activated
3028
NWT/Yukon/Nunavut
User Activated
3029
New Brunswick
User Activated

Time Slot One

Talk Group
Description
Activate
1
Worldwide
Always On
3
North America
Always On
11
Worldwide French
Always On
13
Worldwide English
Always On
111
French
User Activated
113
English
User Activated
121
French 2
User Activated
123
English 2
User Activated
131
DMRplus Canada French 4581
User Activated
133
DMRplus USA 4639
User Activated
302
Canada Wide
User Activated
310
TAC 310
User Activated
311
TAC 311
User Activated
312
TAC 312
User Activated
3022
DMRQ Belairnet to BM
User Activated
3100
DCI Bridge 3100
User Activated
8951
DCI TAC 1
User Activated
9998
Parrot(DMRX)
User Activated
9999
Parrot(MARC)
User Activated
31361
BM Upstate New York
User Activated
31363
BM Adirondacks
User Activated






Thursday, 23 February 2017

Icom IC-7300 review

Icom IC-7300 is the first direct sampling SDR (software defined radio) available from one of the "big three" japanese manufacturers. This helps it bring a whole new level of performance at an accesible price point, a much more flexible configuration and a set of features only seen in top-of-the line equipment. Real-time panadapter or fully customizable filters are just the tip of the iceberg.





 Sure, amateur equipment has been using for a long time various levels of digital signal processing (DSP), but usually this was done in the last part of the receive chain, where it mostly impacted audio quality and not receiver performance. Moving to a direct-sampling SDR architecture means the signal coming from the antenna is directly transposed to the digital domain and instead of all the previously familiar receiver stages (such as mixers, filters, demodulators etc) we are using mathematical formulas applied to the data stream. The advantage of this approach is it eliminates all problems related to real-world hardware receivers (noise, distorsion, losses, imperfections, limitations etc) and opens up a new world on how you can use or visualize RF signals. Goodbye unwanted mixing products, AGC non-linearity, IF chain IMD or filter blow-by. You want a 200Hz to 2250Hz SSB filter ? Just go into the menu, customize it to that value and see how that carrier at 2260Hz simply doesn't get trough; yes, filter width and shape is just a matter of settings, leaving it all to mathematics to carry it out. Basically, the only part that limits the receiver performance is the Analog-Digital Converter (ADC) that samples the RF signal, and those are already very good.