1. Demonstration of digital systems
Joey weedin – kf7nqc
Adam crippen – n7isp
pacific northwest
Amateur radio network

2. pacific northwest Amateur radio network
Digital voice
Digital Voice Overview – Digital compared to Analog, Digital Advantages
pacific northwest
Amateur radio network

3. pacific northwest Amateur radio network
Dmr
Digital mobile radio
Offers two channels in single 12.5 kHz bandwidth two communication paths simultaneously
Voice or Data can occupy either of the channels Amateur Radio typically uses both slots for voice
Each Time Slot is transmitted for 30ms at a time in an alternating pattern
Give DMR overview, Discuss benefits and pit-falls
pacific northwest
Amateur radio network

4. pacific northwest Amateur radio network
nxdn
Next generation digital narrowband
Offers single channel in either single 12.5 kHz bandwidth or two 6.25 kHz channels
Voice or Data can occupy either of the
channels
Improved interference resistance at 6.25 kHz compared to 12.5 kHz bandwidth channels
Give NXDN overview, Discuss benefits and pit-falls
pacific northwest
Amateur radio network

5. pacific northwest Amateur radio network
Service monitor
Know what’s going on under the hood
Frequency Error
Symbol Deviation
FSK Error (Frequency Shift Key)
Service Monitor. Know what’s going on under the hood of your radio
pacific northwest
Amateur radio network

6. pacific northwest Amateur radio network
formally
Tytera
DMR radio manufacturers producing “approved” radios
Other manufacturers not listed
pacific northwest
Amateur radio network