Re: [Discuss-gnuradio] Combining daughterboard outputs into a single signal

[Marcus D. Leech]

On 04/08/2010 04:20 PM, Bahn, William L CTR USAF USAFA USAFA/DFCS wrote:
> Is there a simple, cheap way to combine the outputs of two daughterboards 
> into a single signal before sending them on to a power amplifier?
>
> I need to generate a slow-hopped frequency hopping system that has nine 
> channels spread out over 200MHz of spectrum from 5260MHz to 5460MHz. What I 
> would like to do is use one XCVR2450 daughterboard to generate the 
> odd-numbered hops and a second one to generate the even-numbered hops. I 
> would keep the hop rate slow enough that each board has sufficient time to 
> tune to its new center frequency. 
>
> So what I need is a way to combine the two outputs (only one will be active) 
> into a single signal? Is there a simple, cheap, off-the-shelf way to do this?
>
> On a related note, what kind of output can I expect from the board that is 
> being tuned and what steps can I take to keep in as low as possible?
>
> Thanks.
>
>
>
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>
>   
Plenty of combiners listed here:

http://www.minicircuits.com/products/psc_coax_2_0.html

Pick one that covers the frequency and power range you want, and
provides the isolation you think
  you'll need.



-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org