Questions tagged [digital-voice]

Encompasses a variety of digital modes that seek to modulate a digital signal with the sound of the human voice.

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Kosher to setup a D-Star (or DV) repeater on 10m?

Equipment availability and other logistics aside, is it kosher in the US to fire up a D-Star (or other digital voice) repeater in the appropriate portion of 10m? I haven't been able to find any ...
webmarc's user avatar
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2 votes
3 answers
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Frequency for UHF hot spot in the US

Approximately what frequency should my UHF Pi-Star be set on in the US? Is there a standard?
Dennis's user avatar
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Is PC to Digital Radio possible, is there an existing solution?

Is it possible to setup up an interface from a PC to a digital radio that is able to communicate with a Hytera PD702 handheld (450-520MHz) or like type radio? Or are there off the shelf radios that ...
jono2010's user avatar
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5 votes
2 answers
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Digital transmission sounds

I'm playing with an RTL-SDR dongle and an LNA, on Linux Mint with GQRX and DSD A lot of frequencies show digital transmissions, which the DSD is not converting. I don't whether it is a format DSD ...
KP4MCG's user avatar
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1 answer
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DVMega / DVDongle with a TNC connection to radio

What I want to do is add digital voice (DMR, D-Star, Fusion) capability to an existing dual band mobile or HT. Similar to adding APRS functionality using APRSDroid and a bluetooth TNC. Reading here, I ...
kbyrd's user avatar
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DMR Repeated Audio Packets

I have been performing several weak signal tests using the DMR mode. One of three things seems to happen when a signal gets weak. Audio is completely dropped for duration of weak signal. Audio ...
Skyler 440's user avatar
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3 votes
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P25 Digital vs. Analog

Recently, I was given a Motorola XTS 5000 (Model 1) P25 radio to play around with. It has several local repeaters already programmed into it. It is set for "Mixed Mode", which will receive ...
Lance's user avatar
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8 votes
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DMR / DSTAR / P25 Software Encode / Decode

The large VHF / UHF digital voice communication modes all require the same AMBE vocoder chip from dvsinc. This surface mount chip can be aquired standalone for a relatively high price or all of the ...
Skyler 440's user avatar
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3 votes
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256 views

HD quality voice?

Are there any existing codecs or modes, or are hams experimenting with modes that provide better than telephone/radio quality sound? It seems like there's a lot of opportunity here to stick to narrow ...
Adam Davis's user avatar
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2 votes
1 answer
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Preferred signal report format for Digital Voice?

When using FreeDV or other digital voice modes, what's the preferred signal report? The software has a single SNR number, but that fluctuates quickly. Since it's a digital mode, you either get the ...
scruss's user avatar
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14 votes
4 answers
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Is is possible to operate D-Star from a software-defined radio?

What is preventing a software-defined radio from transmitting the D-Star protocol?
Paul V's user avatar
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8 answers
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VHF/UHF digital single-frequency repeater without duplexers?

Some digital voice protocols are time slotted (TDMA), i.e. the transmitter of a station is not on all the time, and multiple stations may transmit digital voice on the same frequency at the same time ...
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