Yaesu's communications are too vague to rely upon so far, but they had
said at Hamvention that the unit would not be DMR/MotoTRBO compatible.
There is a non-TDMA version of DMR, and the speculation is that this is
what they implemented. I would assume there is an AMBE-3000 chip, but
I've not yet opened up the radio I won at the TAPR banquet.
You can implement the protocol, but not the codec, which is not just
patented but contains trade-secret elements. And if it's AMBE-3000,
DV-Dongle won't help, because that uses an AMBE-2020.
Thanks
Bruce
On 09/23/2013 06:18 AM, Mark Thompson wrote:
Yaesu's digital radios uses C4FM FDMA modulation and Icom's
D-STAR radios use GMSK modulation.
Icom's D-STAR radios use the AMBE vocoder and I understand Yaesu's
radios use AMBE+2 vocoder.
Both vocoders AMBE & AMBE+2 are patented by DVSI, however AMBE ICs are
around $20 in small quantities and
can be used by anyone.
For example, the DV Dongle which allows the D-STAR network to be
accessed from a PC uses the AMBE vocoder.
AMBE+2 is currently used by many commercial systems including NXDN,
MOTOTRBO & P25 Phase II (Phase I uses IMBE).
73, Mark, WB9QZB
*From:* Greg Troxel <[email protected]>
*To:* Mark Thompson <[email protected]>
*Cc:* "[email protected]"
<[email protected]>
*Sent:* Monday, September 23, 2013 7:02 AM
*Subject:* Re: [Freetel-codec2] Annoucing Yaesu System Fusion Group
Mark Thompson <[email protected]
<mailto:[email protected]>> writes:
> The group will cover & discuss Yaesu System Fusion technology and Dual
> Band C4FM / FDMA Digital products
I had the impression that Yaesu was using a different proprietary
protocol than ICOM, but proprietary nonetheless.
But, your posting the annoucements here makes me wonder if I was
mistaken. Are there protocol specs available, which an amateur could
implement?
73 de n1dam
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