DIGITAL MOBILE RADIO ITS NOT JUST A FAD DISCLAIMER I am not an - - PowerPoint PPT Presentation

DIGITAL MOBILE RADIO

“ITS NOT JUST A FAD”

DISCLAIMER

• I am not an expert
• I have been exploring this portion of our hobby for

about 1 year…I learn something new everyday

• I am not trying to steer you from your local analog

repeater…..we need to use it more.

BACKGROUND

• Developed in Europe-European Telecomm Standards

Institute

• Commercial standard for the past 20 years
• Adopted by commercial business industry
• Several OEMs entered into the Ham Radio market about

4 years ago

OVERVIEW

• Digital vs. Analog
• Analog-loses quality as signal decreases
• Digital will remain clear until signal is lost
• Bandwidth
• 25 kHz versus 12.5 kHz
• Uses Time Division Multiple Access (TDMA)
• Splits 12.5 kHz into 2 time slots allowing for 2

conversations on same frequency at once

• Talk Groups

Local DMR Repeaters

• KC2CWT - Halifax Hospital
• Frequency: 443.21250
• Offset: +5.000
• ColorCode: 1
• Time Slot #1 - Group Call 3 = N. America (ON)
• Time Slot #1 - Group Call 1 =World Wide (PTT)
• Time Slot #1 - Group Call 13 =WW English (PTT)
• Time Slot #1- Group Call 3112 =Florida Statewide(PTT)
• Time Slot #1 - Group Call 3174 =Southeast Regional (PTT)
• Time Slot #1 - Group Call 310 =TAC-310 (PTT)
• Time Slot #1 - Group Call 311 =TAC-311 (PTT)
• Time Slot #2 - Group Call 2 =Local-NetWork (ON)
• Time Slot #2 - Group Call 9= Local-Repeater (PTT)
• Time Slot #2 - Group Call 3136 =TRI-State (PTT)

Local DMR Repeaters

• KG4IDD - ESPANIOLA, Florida
• Frequency: 443.40000
• Offset: +5.000
• ColorCode: 1
• Time Slot #1 - Group Call 3 = N. America (PTT)
• Time Slot #1- Group Call 3112 =Florida Statewide(PTT)
• Time Slot #1- Group Call 3113 =Florida Statewide(PTT)
• Time Slot #1- Group Call 3174 =Florida Statewide(PTT)
• Time Slot #1 - Group Call 31128 =Southeast Regional (PTT)
• Time Slot #1 - Group Call 9= Local-Repeater (PTT)
• Time Slot #2 - Group Call 2 =Local-NetWork (ON)

SPECTRUM

LOCAL REPEATER LOCAL NETWORK MASTER SERVER TS 1 TS 2 TALKGROUP TALKGROUP Audio digitally processed Regional Server (internet) Worldwide Server Distribution (internet) “pause” 30ms time slice COLOR CODES DMR ID DMR ID DMR ID DMR ID internet

TALK GROUPS

• Nearly 2000 talk groups
• Local
• State
• Regional
• County
• Special Interest
• STATIC vs DYNAMIC

PTT Timeout

TS-1 Local Daytona Link Florida State SE Florida SE REGION USA Area 4 TG 310 Treasure Coast TGIF HURRICANE NET NE FLORIDA ARES TS-2 FIRST COAST Local Examples

FIRST COAST DMR

Savannah Vadalia GA Exit 27 Soon Kingsland JAX Metro JAX North Orange Park JAX West Waycross JAX Beach JAX South Espanola Daytona Orlando Disney Atlanta Tampa Other

SERVER

HOTSPOT

TG 31121 TG2 TG2 TG2 TG2 TG 31121 TG 31121 TG 31121 TG 31121 TG 31121 TG 31121 TG 31121 Check the repeater owner Configuration C-BRIDGE=LOCAL 2 TS 2 BRANDMEISTER=31121 TS2

NETWORKS

Configuration difference TG sharing Use of time slots

TAC 310-312 SHARED TAC 313-319 NOT SHARED SOME BM SPECIFIC TG TO C-BRIDGE 2589 repeaters 7929 Hotspots 44 Masters

HOTSPOT

Pi-Star Many Modes

• D-Star
• DM
• P25
• NXDN

Single-Duplex Both Time Slots Repeater Like Multi-WiFi accessible

HT & Mobile

Connect Systems PowerWerx Amazon North Georgia Comms Kenwood

CODE PLUG

TALKGROUPS REPEATER

CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION

ZONES CONTACT LISTS

441.000 446.000 CC1 TS 1 ESP-TAC310 (TG310) 441.000 446.000 CC1 TS 2 ESP-LOCAL (TG2) NAMING TO REPEATER TX CRITERIA: CHANNEL FREE, CC, ALWAYS 12.5 kHz bandwidth

HELP!

http://www.dmrfordummies.com/ http://www.RadioID.Net http://firstcoastdmr.org/ http://dmr-marc.net/repeaters.html http://dmr-marc.net/media/DMR_MARC_Best_Practice_Guide_Rev_BB.pdf http://www.palsdmr.com/brandmeister-talkgroup-list/

Next-Social Gathering

First Coast DMR “Meet & Greet” sponsored by FECA

• Saturday, TBD
• Awaiting attendees work schedule

First Coast DMR