Transcript D-Star - CCD Astronomy

Digital Voice and Data
ICOM D-Star
The Cutting Edge?
San Diego Six Shooters
August 20, 2007
The PAPA System
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Contents
• Introduction to PAPA
• About D-Star
– Key Benefits
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Stand alone system operation
Gateway (“Linked”) system operation
RF configuration of repeaters
Additional Benefits
Resources
Conclusion
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What Is D-Star
• ICOM’s implementation of JARL open
standard for UHF/VHF digital voice and
data communications
• Gaussian Minimum Shift Keying (GMSK)
with forward error correction
• Consists of radios, repeaters, and
(optional) gateway hardware and software
• 2 Meter, 440 MHz and 1.2 GHz
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Key Benefits
• Digital quality voice communication simplex or via
repeater
• Very easy setup of repeater/controller
• Coverage on 440 equal to or better than analog
• Alphanumeric call sign ID, call sign squelch (can be
bypassed for emergency traffic), and code squelch
• Wireless internet access via router (part 97 presumably
applies to content)
• Nationwide routed call sign calling via Gateway
• Data Transmission
– Low-Speed Data on UHF and VHF
– ISDN rate data transmission simplex or via repeater (1.2 GHz
only, half duplex)
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Call Sign Squelch (DSQL)
• Configuration option on your radio
• If enabled, squelch opens only when your
call sign is received
• Call sign squelch is bypassed if calling
station operates in EMR mode
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Code Squelch (CSQL)
• Configuration option on your radio
• Squelch opens only when a preset code is
received
• Programmable codes: 0-99
• Code squelch is bypassed if calling station
operates in EMR mode
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D-STAR Repeater System
Stand Alone 4 Box System Shown*
Note 1
Module“A”
Note 1
Note 1
Note 1
Module “C”
* D-STAR System can be
Controller Plus any 2M,
440, 1.2 GHz DV or 1.2
GHz DD Modules
Module “B”
Note 1: Analog RF Components (Filters, Cavities, Circulators, PreAmps, etc
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Repeater System Use Radio Setup (Stand Alone Sys)
Repeater Module ID “A”, “B”, “C” must be in the 8th Character position
^ = SPACE
Use of Any One Band Box (Same Band) by itself
• To make a call from the 440 MHz “B” Repeater module thru the 445MHz
"B" repeater module.
̶ Frequency: 446.730(-) (Note: Repeater is not expected to recognize N6SIX)
̶ MYCALL: W6SIX
̶ URCALL: CQCQCQ (General Inquiry to Everyone) or
(Specific Station Call Sign e.g. W1AWX)
̶ RPT1: N6SIX^^B
̶ RPT2: NOT USE
Cross Banding in Addition to Same Band (N6SIX System)
• To make a call from the 440 MHz “B” Repeater module thru the 144.52
MHz “A" repeater module.
̶ Frequency: 446.730(-)
̶ MYCALL: W6SIX
(Note: Repeater is not expected to recognize N6SIX)
̶ URCALL: CQCQCQ (General Inquiry to Everyone) or
(Specific Station Call Sign e.g. W1AWX)
̶ RPT1: N6SIX^^B
̶ RPT2: N6SIX^^A
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GPS Operation
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IC-91AD
ID-800H
IC-2820
Low-Speed Data
IC-2820
• Data, PC Programming Cables
̶ IC-91AD & IC-2820

Same Cable used for Both Radios
̶ ID-800H
 PC Programming – OPC-478 or
OPC-478U
 Data – OPC-1529R
• Any Terminal Program should work
̶ ID-91AD Software includes Terminal Prog
̶ D-CHAT by NJ6N (Quite “User-Friendly”)
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Internet Connectivity
Graphic courtesy of Texas Interconnect Team
10.x.x.100
10.x.x.101
RP2
Hub
ID-1
Router
Internet
10.x.x.102
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Linked Repeater Operation
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Gateway Operation
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D-STAR Repeater System
4 Box System with GATEWAY Shown*
Note 1
Note 1
Module“A”
Module “C”
Note 1
Note 1
Module “B”
* D-STAR System can be
Controller , GateWay PC
Plus any 2M, 440, 1.2 GHz
DV or 1.2 GHz DD Modules
Note 1: Analog RF Components (Filters, Cavities, Circulators, PreAmps, etc
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Repeater System Use Radio Setup (Gateway System)
Repeater Module ID “A”, “B”, “C” must be in the 8th Character position
^ = SPACE
Same as Stand Alone except …..
Cross Banding in Addition to Same Band (N6SIX System)
To make a call from the 440 MHz “B” Repeater module thru the 144.52 MHz “A"
repeater module.
̶ Frequency: 446.730(-)
̶ MYCALL: W6SIX
(Note: Repeater is not expected to recognize N6SIX)
̶ URCALL: /VK8SDFB (General Inquiry to Everyone on VK8SDF “B” Repeater
Module; “/” is same as CQ)
̶ RPT1: N6SIX^^B
̶ RPT2: N6SIX^^G
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RF Configuration (D-10)
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RF Configuration (D-1)
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Additional Benefits
• Extensive support via forums and user groups
• Radios work in both digital and analog modes and dual
banders are available
• 53 repeaters now on Gateway network
• Probably between 80-100 repeaters on the air
• Lower bandwidth requirements (6.25 KHz vs. 10 KHz)
• Digital messaging in Digital Voice mode (i.e., works on 2
M, 440 or 1.2 GHz)
• Location services (e.g., D-PRS/APRS)
• IP compatible, open JARL standard
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Resources
• http://www.icomamerica.com/amateur/dstar/default.asp Icom
D-Star Home
• illinoisdigitalham (Yahoo Group, digital radio in general,
including D-Star)
• http://www.hamradio-dv.org/ Digital Radio Audio Comparisons
• http://www.icomamerica.com/support/forums/ D-Star Forums
(ICOM hosted)
• http://www.arrl-al.org/D-STAR_class_2.pdf DSTAR Radios
• http://www.icomamerica.com/downloads/manuals.asp
Icomamerica manuals downloads (ICOM hosted)
• http://www.ccdastronomy.org/D-Star (this presentation, in the
“about D-Star” section)
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Radios Now Available
• ID-1 1.2 GHz Mobile (10 Watts, High Speed Digital Data,
Digital Voice, Analog Voice) -- $979
• ID-800H 2M/440 Mobile (55 Watt VHF/50 Watt UHF
Digital Voice and Data, Analog Voice -- $610
• IC-2200H 2M Mobile (65 Watt VHF Digital Voice and
Data -- $350 with optional digital module
• IC-V82/U82 2M/440 HT (Digital Voice and Data) -- $390
with optional digital module
• IC-91AD 2M/440 HT (Digital Voice and Data, Analog
Voice) -- $628 with digital module
• IC-2820 Dual Band Mobile (Analog and Digital) -approx. $950 with optional DV module
• Home brew 2-meter demonstrated at Dayton this year
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Requirements
• Filters required for repeater in dense RF
environments
• Internet access required for Gateway
– Static IP required, DSL bandwidth
• Gateway software runs only on Linux (Fedora
Core 4 is recommended)
• Repeaters must have unique call signs
• Gateway operation requires certification
– Take and Pass (Complete) ICOM Administrator
Course
• Familiarity with basic Linux terminal commands
is very helpful for Gateway configuration
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Challenges
• Getting coordinated pairs on 440 (may be
able to allocate an existing pair)
• ICOM controller lacks many features
– Linkcom will develop D-Star capable
controller
• ICOM proprietary components
– Codec (has been replicated)
– Gateway (opendstar.org to develop open
source version)
• 10 GHz link system is not available in US
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The Cutting Edge?
• Not the only digital game in town, but it
works out of the box
• Excellent performance on 440
• ISDN rate internet access via ID-1
• Transparent call routing throughout the DStar Network
• Significant experimentation and innovation
is occurring (e.g., home brew radios,
openstar.org)
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