Re: [Discuss-gnuradio] Default antenna with RFX2400

[Josh Blum]

On 12/12/2011 08:25 PM, Phone Naing MYINT wrote:
> Hi,
> 
> TX is clear, defaulted to TX/RX. RX default to direct conversion, what does 
> it mean?

RFX2400 is a direct conversion receiver *and* a direct conversion
transmitter. What the docs really should say:

1) When you tune the transmit chain, the default behaviour is to tune
the LO away from the desired center frequency.

2) When you tune the receive chain, the default behavior is to tune the
LO as close as possible to the desired center frequency.

You can of course, override this behavior:
http://files.ettus.com/uhd_docs/manual/html/general.html#tuning-notes

 For receive, using TX/RX or RX2 provides same performance?
> 

TXRX vs RX2 is just a simple switch. You must pick what is most useful
for your application (full vs half duplex). Obviously, for a
receive-only application, either antenna option is good.

-josh