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Re: [Discuss-gnuradio] USRP in TDD mode

From: Andrey A
Subject: Re: [Discuss-gnuradio] USRP in TDD mode
Date: Wed, 23 Sep 2009 18:54:51 +0400

Thanks for reply. I tried std_2rxhb_2tx.rbf firmware from gnuradio 3.2.2 and results are the same. Without enabling transmitter at the receiver the received signal range is [-15e3; +15e3], and after enabling transmitter it became [-2400; +2400].
The workaround you mentioned is not applicable in my situation, since I need to receive and transmit from the same antenna.

I'm not sure if I enable receiver and transmitter simultaneously in the right way.


On Tue, Sep 22, 2009 at 9:55 PM, Stefan Brüns <address@hidden> wrote:
On Tuesday 22 September 2009 19:47:10 Andrey A wrote:
> Hello.
> I'm trying to build a two-way TDD system with two USRP1 boxes in pure C++
> using libusrp and inband_2rxhb_2tx.rbf firmware.

IIRC the ib firmware has a bug not switching the antennaes correctly.
Workaround: set RX antennae to RX2 and connect an antenna to each port.


 Stefan Brüns  /  Bergstraße 21  /  52062 Aachen
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