Re: [Discuss-gnuradio] Computer controllable antenna tuner

[Marcus Müller]

Hi Juha,

there's a lot of devices that do your job.
From the "classic commercial-grade" devices of the USRP line,
to cheaply available rx modules like the (in)famous dvb-t dongles. You 
can use the tuners on old PCI tv cards and a ton of other stuff.
It all depends on what you need to do: What frequencies do you need to 
tune to? What bandwidth do you need afterwards? Do you want I/Q or are 
you basically doing AM? Want to have ADC afterwards or do you really 
need the analog baseband?
For your "commercially available tunable magnetic loop antenna": I don't 
know. Not my kind of technology. Try a random used car radio that can 
receive MW broadcasts and does the tuning digitally. Most probably 
you'll find a tuner module that works well but has no available 
documentation whatsoever. Use your favourite digital analyzer to find 
out how the microcontroller interfaces with that. Or ask your RF IC 
manufacturer of choice. They build hardware. GNU Radio has nothing to do 
with that.
However, this question is awefully unspecific and has little to do with 
GNU Radio, as it is a software radio system (and less concerned with the 
hardware; anyway, 1-20MHz sounds a lot like baseband to me).

Greetings
Marcus

Am 11.05.2013 14:37, schrieb Juha Vierinen:
> Hi,
>
> Does anyone know a good antenna tuner with a serial port, usb or
> ethernet connection that allows you to tell the tuner what frequency to
> tune to? I could really use something like this.
>
> Also, does anyone know of a good commercially available magnetic loop
> antenna for the HF band (1-20 MHz)? Again, I'd want to use a computer to
> tune the antenna for a certain frequency range.
>
> juha
>
>
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