Does anyone have an idea on how to interface a handheld/desk
microphone to use the sm1000?
On 2/4/2019 10:24 AM, Don wrote:
I am currently working on getting the 700D mode to work with the SM1000.
It is not certain that this will be possible because of the memory
needed.
Also Dave is
agreed
but the vocoder is lots of work for most small CPUs in desktop radios...
I'd doubt there would be enough to go around to include the CODEC2
vocoder in most of them.
suggest an castanellated or 1.27mm header tiny PCB with a rx1020/STM32H7
on it.
On 6/02/2019 5:19 AM, David Rowe
Alan
a test for your receiver... How well can you hear the 14.1 CW beacons ?
there are about 18 on the same frequency on a time domain multiplex basis.
ncdxf.org
http://ncdxf.org/pages/beacons.html
you should be able to hear the ZL beacon with the sun over sydney, and
the VK6 beacon with
Hi all,
As you may be aware, the Parrot repeater has been running for two
months on 14.153MHz USB but there's been absolutely nothing heard.
Well almost nothing. A few blurts.
All the received audio is available on my website:
www.unixservice.com.au/parrot
I put the received files there a day
Currently, SVN 4013, the Codec2 library is 1Mb on the ARM system here.
No problems on a 16Gb SD card. Or, the 500Gb laptop SATA disk on the BPi M2B
here as "parrot" repeater.
Anyway, can somebody cut down the FreeDV app to just a command line app
to run headless on a Pi clone running Linux?
Or,
The SM1000 could do FDM and Vocoder in one CPU, but it doesn't have to
be that way. The desktop system currently uses a Vocoder and Modem
interfaced with an API. The API is growing to probably become a
significant module in itself.
I was thinking that the Vocoder and API could be in one product,
Given FreeDV is open source software, uses modest CPU, and the trend
towards SDR ... FreeDV is perhaps destined to be implemented as a
software library inside next-gen radios.
BSD licensing would perhaps help that - and of course the mode being
popular enough to warrant inclusion.
Cheers,
David
Don,
I'm not so sure about "major radio makers", my thinking was more around
hams building their own rigs (that's still fairly common in the UK, though
maybe not elsewhere). Such a module would then give an easy way for someone
who is more focused on the RF engineering side of things to add
You should decide how serious you are about getting major radio makers to
use it. They will want something small and inexpensive, not what we want for
development. I would leave most of the audio, power, and IO circuitry off.
Don
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