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Re: [Discuss-gnuradio] VHF Transmitter


From: Dimitris Symeonidis
Subject: Re: [Discuss-gnuradio] VHF Transmitter
Date: Thu, 27 Nov 2008 15:42:16 +0100

What about BasicTX, which does 1-250MHz?

Dimitris Symeonidis
"If you think you're too small to make a difference, try sleeping with
a mosquito!" - Amnesty International



On Thu, Nov 27, 2008 at 15:22, Ed Criscuolo <address@hidden> wrote:
> The project I'm working on (an SDR for a spacecraft
> communication groundstation) needs to transmit VHF at
> around 145 MHz.  There seems to be a distinct "gap"
> in the transmit capabilities of the USRP daughterboards
> between 32 MHz and 400 MHz.
>
> I'm looking for suggestions as to how to best accomplish
> this.  My initial thought was to output at 10 MHz using
> an LFTX board, and upconvert to 145 MHz with an external
> mixer, LO, and filter. This seems straightforward, but
> would be a custom implementation, and my project wants
> to stay with commercial-off-the-shelf if possible.
>
> Another suggestion was to skip the modulation (GMSK) and
> output the baseband signal with an LFTX.  This could then
> be fed into a commercial off-the-shelf VHF FM transmitter.
>
> I was also wondering if it would be possible to modify
> an RFX-400 daughterboard to go down that low (Matt?).
>
> Anyway, I was hoping to hear what people thought of these
> suggestions, and any others they might have.
>
> @(^.^)@  Ed
>
>
>
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