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.