Different frequencies for TX/RX and RX2 port on RFX2400

Hi,

I was just wondering if someone can give me little bit of information
about
the clocks for TX/RX & RX2 antenna port on RFX2400.

My questions are related to simultaneous transmission using TX/RX and
reception using RX2, so my transmit and receive frequencies have to be
different on the transciever board ( please correct if I am wrong). So,
I
need to know some basics of RFX2400 antenna port operation.

Do we have different frequency generator circuits for these two ports or
single circuit used for both?

Now when I read the mail from Matt (
http://lists.gnu.org/archive/html/discuss-gnuradio/2005-07/msg00035.html
),
what I see that there is a clock line difference of around 1 cm. So, if
I
have two different frequency generator circuits for TX/RX & RX2 ports,
then
do we still get this clock line difference? (by chance, I am not a
microelectronics guy and so, I dont understand the meaning of clock line
difference and its effect, therefore, I would like to know about it in
brief)

Or, if we have only one frequency generator circuit then can we control
the
different frequencies on these two antenna ports simultaneously? If yes,
then can you please refere me some documents/codes/examples, so that I
can
understand the use of it? If not, then is it done in sequential manner
or
some priority based scheduling?

Any help would be gratefully accepted.

Thanks in advance.

Regards,
Tarun
UT Dallas

Tarun T. wrote:

Do we have different frequency generator circuits for these two ports
or single circuit used for both?

There are separate VCOs and PLLs for TX and RX.

Now when I read the mail from Matt (
http://lists.gnu.org/archive/html/discuss-gnuradio/2005-07/msg00035.html
), what I see that there is a clock line difference of around 1 cm.
So, if I have two different frequency generator circuits for TX/RX &
RX2 ports, then do we still get this clock line difference? (by
chance, I am not a microelectronics guy and so, I dont understand the
meaning of clock line difference and its effect, therefore, I would
like to know about it in brief)

You don’t need to care about that.

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