Re: [Discuss-gnuradio] XCVR2450 simple questions

[Jorge Miguel]

Jason,

You are right my question about switching between tx and rx only makes sense if it is no possible to tx and rx at the same time.

Since you told me it is possible to it at the same frequency (that means small doppler frequency shifts) the system looks promissing. I was afraid of wasting most of the time of my unambiguous radar range waiting to the system to switch to reception mode.

Many thanks,
Jorge.

On 11 October 2010 20:05, Jason Abele <address@hidden> wrote:

On Mon, Oct 11, 2010 at 10:34 AM, Jorge Miguel <address@hidden> wrote:
> My simple questions are:
> Does XCVR2450 work in full duplex mode?

Yes, although with one synthesizer, it will be on the same frequency
for rx and tx

> If yes: Does anybody know the isolation between tx and rx (Whole daughter
> board: transceiver,amplifier and RF switch) ?

I do not have full characterization for you, but it will be dominated
by the antenna switch (U2), you can find the datasheet here:

http://www.hw.com.tw/PDF/Switch/en/HWS383_v1.pdf

Looks like ~30dB at 2.4GHz

> If not:  Does anybody know the time that XCVR2450 takes to switch from tx to
> rx state ?

It should be approximately the round-trip time for a control packet,
since you will not be tuning to a new frequency.  However, because you
can do full-duplex, I doubt you need to switch.

Jason