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Re: [Discuss-gnuradio] Simultaneous TX/RX Sample Code for RFX (FLEX) 400

From: Martin Dvh
Subject: Re: [Discuss-gnuradio] Simultaneous TX/RX Sample Code for RFX (FLEX) 400
Date: Tue, 23 May 2006 12:39:47 +0200
User-agent: Debian Thunderbird 1.0.2 (X11/20060423)

Matt Ettus wrote:
>>>Although I am aware that the signal will need to be attenuated severely, I
>>>am unsure what the RF front end of the RFX-400 is spec'd for.  With a 20 dBm
>>>signal at the TX, I am planning to use anywhere from 40 to 60 dB of
>>>attenuation.  I believe this will give me a -20 to -40 dBm signal at RX2. 
>>>This should be acceptable, right?  Thanks again for your help, it is much
> There is enough leakage between the TX and RX side that you won't need
> to connect them at all.  Just put a dummy load on the TX side.  The
> TX/RX switch has about 35 dB of isolation.  You may get some extra
> isolation by setting the RX input to RX2 and putting another dummy load
> there.
> You can also lower the TX power.
I thought the TX power allways had to be at maximum for the RFX boards.

> Matt
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