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[Discuss-gnuradio] Full duplex with RFX2400 on USRP2

From: 加藤義也
Subject: [Discuss-gnuradio] Full duplex with RFX2400 on USRP2
Date: Thu, 18 Mar 2010 17:28:35 +0900

Hello gnu-radio friends.

I would like to realize RFX2400 full duplex configuration.

I am using RFX2400 on USRP2 and tried to transmit and receive(fft.py at the same time.
But I got unstable spectrum for both TX/RX.
Here is the video
And configuration is as below.

S |
R |
P |
2-+RFX2400( RX2 )+----Signal Source.

I found RFX2400 schematics from below URL

And I believe this situation is because of U202 / U209 to swith state cycles
 A->B and B->A in very often.

I would like to use both U202 / U209 to fix the swith state always to "A".

Would you please let me know how to make U202(RFswitch) / U209(RFswitch) fix to A state.
(say "full-duplex mode")

Do I still need to hardwire fix the RF-swith to A? if there is no FPGA image / firmware available to fix them.

Thank you very much in advance.

Best Regards.

121-0012 東京都足立区青井6-8-11
電話:03-5888-7300 FAX:03-5888-7301
Telemann Communications Co., Ltd.
TEL:+(81)-3-5888-7300 FAX:+(81)-3-5888-7301
Board Member / Technical Director
Yoshiya Kato <address@hidden>

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