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15

Nothing is preventing an SDR from transmitting the D-STAR protocol, other than the need to implement it as such. It is open, and currently I know that Digital Signal Decoder (DSD) can actually decode some data and textual frames. What prohibits transmission of D-STAR Digital Voice is the codec used to encode the voice - it's AMBE2000, which is patented and ...


5

Nothing. In fact, the UDR56k is an SDR and transmits D-STAR. If you want D-STAR digital voice, you do need to purchase an add-on card which contains an ASIC from DVSI implementing the propritary AMBE codec, or pay a substantial (but undisclosed publicly) licensing fee. One can safely assume that any licensing agreement would forbid any free proliferation of ...


5

Here is a link to a presentation by Bruce Perens K6BP two years ago: http://algoram.com/dcc2014/AMBE_Exposed.pdf. Start at "Can Hams Use Software AMBE?" I am not aware of any significant changes since then. There exists a software solution (mbelib), but it is patent encumbered. So much so that the authors are anonymous. You are probably aware of the open ...


4

You have the right general idea, but a couple of problems: The sample rate entering the DSD block (hence the output of the FM demodulator) must be 48000 Hz; this is hard-coded in gr-dsd. From your screenshot, you have 35k where you need 48k. The deemphasis (a.k.a. tau) of the FM demodulator should be set to None, rather than the default of 75. In my ...


4

What do you mean by "regular repeaters"? Do you mean analog repeaters? I haven't found a list of analog repeaters built into the ID-51A, no. But I found this site that will give you the nearest several hundred repeaters to a given location (enter your city/state and click the button). You get them in CSV format which maybe is used by Icom's programming ...


3

Is case anyone is curious, yes...it does. Simply push the middle button and a repeater list comes up. It is simple to set up, as can be seen from this HOWTO guide http://www.dstarinfo.com/Data/Sites/1/GalleryImages/FullSizeImages/id-51-beginner.pdf


2

The DV3000 from NW Digital Radio provides the AMBE Vocoder. One person has modified Digital Speech Decoder (DSD) to use it instead of reverse engineered library, it is also supported by other solutions such as G4KLX's DummyRepeater. An AMBEServer, (Raspberry Pi + DV3000) on your LAN would provide Vocoding to a SDR if the proper protocol and modulation ...


2

The propretary AMBE codec prevents you from using D-Star for voice. Without that codec, you can't talk over D-STAR. However, you can use the DV Dongle http://www.dvdongle.com/DV_Dongle/Home.html to talk with D-Star users over the Internet.


2

It has been about a year since I have administered a US Trust System gateway, but I believe you would need to contact the administrator of the old gateway; they would delete you from the gateway, and then you can register with the newer gateway. Although it is a guideline, I wouldn't think it is a necessity to move your registration. Since we do not run ...


2

The ICOM gateway terminal mode is a unique mode. It allows you to configure the radio to use the radio, tethered to a computer through a USB cable, to route the communications through the computer, out to the Internet, to access a remote gateway. In this mode, the RF signal of the radio is not a factor since all communications are actually going through the ...


2

The D-Star simplex frequencies in the UK are 144.6125 MHz, 438.6125 MHz and 1298.6125 MHz.


2

The ID-51A Plus behaves differently. Near repeater does NOT work as documented. I am hacking at it to try to figure it out. Following the instructions on the above link provides nothing. The to: is underlined and you cannot use the up down to go to the field to reset it. Basically you are stuck in a catch where a reset is required to get you out. If ...


2

Given that it has been established that there is no 'standard', the main criteria for picking a frequency are: Find a frequency where the mode you are using is permitted Find a frequency where you will not interfere with an existing user of the band Make sure you use as little power on your handheld as necessary to get into your hotspot. The hotspot is ...


1

A web search revealed nothing, so I would suspect that there is no standard UHF frequency for D-STAR hot spots, in Kansas or anywhere else. The ARRL Band Plan for the 70cm band reveals that 433–435 MHz is for "Auxiliary/repeater links", which seems like the category that hot spots would fall in. Typical UHF/VHF channel spacing is 20 kHz, and you ...


1

As of firmware version 1.06, it seems that there is no way to use the actual Link to Reflector feature to link to non-REF or non-XRF reflectors. However, the Link to Reflector option need not be used to establish a link. Instead, the linking can be done the old way, but putting the command in the Your Call Sign option, or by using the Direct Input (UR) ...


1

I'm not sure what "(REGIST)" means, but preferably you should contact the repeater administrator or equipment dealer person who registered you to fix the problem. If you do a web search for "D-STAR registration check" you'll find several web pages that can look up your registration status, and which repeater you were registered on. If for some reason the ...


1

OK after a couple of weeks I just stumbled onto the answer! Basic Vox only works if you have squelch turned on to at least a minimum setting.


1

The empty repeater slots are the remaining memories in available in your radio. The Percent FM are the number of repeaters in the list that are standard FM (i.e. not DV).


1

No. The D-74 cannot act as an access point/gateway.


1

This should help http://dstargateway.org/D-Star_Registration.html "... Should you have any problems with registration, send email to AA4RC@ARRL.NET and include your name, callsign, and problem description. "


1

Yes when you update your SD card change percent box of FM repeaters to a much higher number. It will locate them by zip code and give you a very complete list once imported. If you travel far just have that SD card ready plug in and download. Doesn’t affect your memory channels etc. Very easy to search and scan.


1

The ID-51A plus advertises that it finds FM repeaters via GPS location. I have tried everything but it does not work as advertised. It has worked in only one location where I live but I have tried it while traveling with no luck. I called Icom support, they gave me some info that did not work. Very disappointing! They also state that the ID-5100A mobile does ...


1

The DVAP hotspot uses (or at least can be configured to use) simplex operation. This means that both your radio and the DVAP hotspot use the same frequency to transmit and receive. If you are operating with the DVAP in simplex mode, it does not count as a repeater and so an Advanced Qualification is not necessary.


1

After consulting with a Canadian D-STAR gateway operator, I have learned that yes, club stations can register callsigns on D-STAR. Operating in this manner would be no different than operating a club station over the air with a non D-STAR radio or using a D-STAR device with a personal callsign. The one caveat to this is that if the club in question wishes ...


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