Combining daughterboard outputs into a single signal

GNU Radio
1

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.

2

On Thu, Apr 8, 2010 at 4:20 PM, Bahn, William L CTR USAF USAFA
USAFA/DFCS [email protected] 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.

RF Power combiner? I’ve used RF splitters fairly often, so while I
have no direct experience going the opposite direction, I think there
are plenty of companies that will sell what you need. One reference
covering some basic questions:

Good luck,
Doug

–
Doug G.
[email protected]

3

On 04/08/2010 04:20 PM, Bahn, William L CTR USAF USAFA USAFA/DFCS wrote:

Discuss-gnuradio mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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