[Discuss-gnuradio] What kind of frequency hop rate is achievable with the RFX Boards?

[wbahn]

We have been requested to provide some signals for another  
organization to detect and analyze. We don't have to receive anything  
and so it is perfectly acceptable to pregenerate the outgoing waveform  
and just play it back over the air.

Here are a couple of the requests that, hopefully, are within the  
capabilities of the USRP with the RFX2450 daughterboard.

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Request #1:

Frequency Hopped Spread Spectrum in the 5.8GHz ISM band. They want a  
data rate of at least 500kbps and want 9 channels in the hopping  
sequence with a channel separation of at least 16MHz.

The issue I see here is that each hop will require a retuning of the  
daughterboard's center frequency. How long does it take the USRP to  
retune?

One thought I had was to use two daughterboards and ping pong back and  
forth between them. While one is transmitting the other can be tuning  
to the next hop. Does this sound feasible? How quickly can the  
transmit signal be switched from one daughterboard to the other?

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Request #2:

5.8GHz COTS WiMAX link at a data rate of 1Mbps.

Is this doable with the USRP? Again, all I need to do is transmit a  
realistic signal. I don't need to receive anything.

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TIA!