[cma-l] AMCR - SDR

[Associated Broadcast Consultants]

If anyone is interested I have Software Defined Radio for sale on Ebay at
the moment.  I've used the same type of unit to run a DAB test multiplex.
I'm pretty sure I've recall that someone has already written the code to
run it as a DRM transmitter.

http://www.ebay.co.uk/itm/HackRF-One-Software-Defined-Radio-NEW-Unopened-FREE-Postage-BARGAIN-/271983417851?hash=item3f537999fb

I can't help feeling though that the SDR is the "easy" part.  The difficult
part is getting an efficient aerial system.

Glyn

-- 
Glyn Roylance - Principal Consultant
Associated Broadcast Consultants <http://www.a-bc.co.uk/>







On 15 September 2015 at 08:16, Tony Bailey <ravensound at pilgrimsound.co.uk>
wrote:

> Hello Marc et al,
>
> I mentioned DRM on AM because it would be easily implemented in a software
> box.  I think the Talk 107 test used two programme channels on one FM
> carrier.  In fact the main issue with medium wave is getting a stable earth
> system without ploughing a field!  Antennas can be short (most RSLs use
> them) but they aren't very efficient due to being very small impedance
> compared to the ground.  As has been pointed out this isn't a problem if
> you can site the antenna in (or on) water.  I wondered if given that SDR
> requires an rf box maybe a clever designer could come up with a low
> impedance amp that could include matching directly connected to the
> vertical antenna sitting on a ground plane.
>
> Regards,  Tony
>
>
>
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