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D-Star User’s Meeting. Saturday, Mar 6 2010. Introductions. Let’s get to know one another. Purpose. Introduce new users to D-Star Refresh current users in procedures and practices Help with radio programming including programming examples

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D star user s meeting l.jpg

D-Star User’s Meeting

Saturday, Mar 6 2010


Introductions l.jpg
Introductions

  • Let’s get to know one another


Purpose l.jpg
Purpose

  • Introduce new users to D-Star

  • Refresh current users in procedures and practices

  • Help with radio programming including programming examples

  • Explain D-Controller functions and command structure

  • Explain Linking, Routing, Reflectors


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What IS D-Star?

  • Digital Smart Technologies for Amateur Radio

  • Developed jointly by the Japan Amateur Radio League and ICOM beginning in 1999

  • Significant changes released in 2004

  • Defines two modes

    • DD (Digital Data) – High-speed digital data – only on 1.2 GHz – not in very wide use

    • DV (Digital Voice) – Voice (and a low-speed data channel) available on 2 m, 70 cm, and 23 cm

  • We’ll be discussing the DV mode


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Digital Voice

  • Uses the AMBE CODEC, provided by Digital Voice Systems, Inc.

  • Operates at 4800 bps

    • 2400 bps for the voice channel

    • 1200 bps for the Forward Error Correction channel

    • 1200 bps for the low-speed data channel

  • Approximately 6.25 kHz occupied bandwidth – a significant spectrum savings compared to 16 kHz occupied by a standard FM voice signal


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Advantages and Disadvantages

  • Range is approximately the same as a standard FM repeater, but with a difference

    • Standard FM Repeater signals gradually degrade and get noisier with distance

    • D-Star signals decode and sound fine until they “drop off a cliff”

    • Marginal D-Star signals will “R2D2”

  • D-Star radios cost somewhat more than comparable FM radios

  • While an open standard, only ICOM is making D-Star equipment


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More Advantages and Disadvantages

  • CODEC is proprietary – this gives some people heartburn

  • Programming becomes more difficult

  • You can link to any connected D-Star repeater in the world with simple commands

  • Linking is currently Internet based, reducing reliability in the event of a disaster

  • There are many more advantages and disadvantages, but we’ll leave that for future discussions


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Current NC D-Star Repeaters

  • W4GSO – Greensboro, NC – 70 cm

  • AK4EG – Burlington, NC – 2 m, 70 cm, 23 cm

  • KR4RDU – Carrboro, NC – 70 cm

  • KI4WXS – Charlotte, NC – 2 m, 70 cm, 23 cm

  • KR4RAL – Raleigh, NC – 70 cm


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On To The Good Stuff

  • OR

  • How to USE that new D-Star radio!


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Some Definitions to Start Off

  • Repeater

  • D-Controller

  • Gateway

  • D-Plus

  • Reflector

  • Linking

  • Routing

  • DV-Dongle

  • DV-Access Point

  • Quick-Key


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Callsign Fields

  • MyCall

  • UrCall

  • Repeater 1

  • Repeater 2


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How to Make It All Work

  • Think of it like layers

  • Normal FM repeater – Frequency, Offset, maybe Tone

  • D-Star repeater – Frequency, Offset, ID (MyCall), Destination (UrCall), Repeater used (R1), Additional Repeater used (R2)

  • All fields must be properly set to make it work like you want it to


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Some Examples

  • For regular day-to-day communications

    • MyCall – K4HC

    • UrCall – CQCQCQ

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • This enables anything I transmit to pass to the Gateway – this includes connected Dongles, Access Points, Repeaters and Reflectors


Slide14 l.jpg

  • For local ONLY communications (e.g. don’t want to interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – CQCQCQ

    • R1 – W4GSO**B

    • R2 – Blank or “Not Use”

  • My transmissions WILL NOT be passed to the Gateway – will ONLY be heard on the local repeater


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Linking vs Routing interrupt conversations on a connected reflector)

  • Routing defined in the D-Star standard

  • Linking defined by D-Plus

  • Routing is more cumbersome

  • Every station wishing to participate must alter their settings to participate in Routing

  • Linking requires a single command, then everyone set up for Gateway operation can participate

  • Routing is blind – you can’t hear what’s going on at the distant end

  • For these reasons, Linking is normally preferred over Routing


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Routing – A BRIEF Overview interrupt conversations on a connected reflector)

  • Two types of Routing

  • Callsign Routing (to a specific station)

  • Source Routing (to a specific Repeater)

  • One advantage of Callsign Routing is you don’t need to know WHERE the called station is – the call is routed to the last repeater where that station was heard (some delay in this)


Callsign routing l.jpg
Callsign Routing interrupt conversations on a connected reflector)

  • MyCall – K4HC

  • UrCall – WG5Q

  • R1 – W4GSO**B

  • R2 – W4GSO**G

  • Routed to last heard repeater/port WG5Q used

  • To reply, WG5Q would need to alter his settings (using one-touch reply)


  • Source routing l.jpg
    Source Routing interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – /KR4RDUB

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • Transmissions would output on the KR4RDU Port B repeater

  • To reply, a station would need to alter settings

  • Note the port is in the 8th position


  • Linking the preferred way l.jpg
    Linking – THE Preferred Way interrupt conversations on a connected reflector)

    • MyCall - Stays the same, all the time

    • UrCall – Normally CQCQCQ

      • Also used to Link, Unlink, Callsign Route, Source Route, issue D-Plus and D-Controller commands

    • R1 – Always the repeater and port you are talking into – 8 digits

    • R2 – Used for Gateway and (future) RF port forwarding – 8 digits


    Link examples l.jpg
    Link Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – REF017CL

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • This will link the repeater to Reflector 17C

  • Note L in the 8th position

  • This is the only time the port is moved from the 8th position to the 7th position


  • Link examples21 l.jpg
    Link Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – KR4RDUBL

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • This will link W4GSO B to KR4RDU B

  • Note no space between KR4RDU and B

  • Note L for Link in position 8


  • Link examples22 l.jpg
    Link Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall - *******U

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • U in the 8th position

  • This will Unlink from any repeater or reflector


  • Command examples l.jpg
    Command Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – W4GSO**E

    • R1 – W4GSO**B

    • R2 – Not Use

  • Echos from D-Controller

  • Also shows BER (Bit Error Rate)


  • Command examples24 l.jpg
    Command Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – W4GSO**E

    • R1 – W4GSO**B

    • R2 – W4GSO**G

  • Echos from D-Plus

  • Also shows BER


  • Command examples25 l.jpg
    Command Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – W4GSO*S0

    • R1 – W4GSO**B

    • R2 – Not Use

  • SAVES a message for automatic playback


  • Command examples26 l.jpg
    Command Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – W4GSO*R0

    • R1 – W4GSO**B

    • R2 – Not Use

  • RECALLS (Plays) a recorded message


  • Command examples27 l.jpg
    Command Examples interrupt conversations on a connected reflector)

    • MyCall – K4HC

    • UrCall – W4GSO*C0

    • R1 – W4GSO**B

    • R2 – Not Use

  • CLEARS a recorded message


  • Notes on channel memories l.jpg
    Notes on Channel Memories interrupt conversations on a connected reflector)

    • While you can manually change the values especially in UrCall for Linking, Routing and issuing commands, this tends to be cumbersome

    • I have several “channels” programmed with the same frequency information, but to perform different functions

    • W4GSO Gateway

    • W4GSO Local

    • W4GSO Link to Ref 17C

    • W4GSO Link to Ref 02A

    • W4GSO Unlink

    • W4GSO Save Message

    • W4GSO Play Message

    • W4GSO Clear Message

    • Plus others

    • Memory Names identify what is what


    More programming ideas l.jpg
    More Programming Ideas interrupt conversations on a connected reflector)

    • Use Memory Banks for different areas

    • Develop a naming convention that YOU understand

    • Buy the Software, and make or buy the cables – your life will be much easier


    Questions l.jpg
    Questions? interrupt conversations on a connected reflector)


    Thank you l.jpg
    Thank You! interrupt conversations on a connected reflector)