[USRP-users] WBX in half duplex mode

Matt Ettus matt at ettus.com
Tue Feb 14 00:26:45 EST 2012


Yes, the TX/RX port will switch between the two modes when you are in half
duplex. TX will automatically go to that port, so you just have to set your
receive antenna appropriately.

Matt

On Mon, Feb 13, 2012 at 8:35 PM, Haris Kremo <hkremo at jp.toyota-itc.com>wrote:

> Dear Ettus developers,
>
> From what I understand the WBX daughter card has two antenna connections
> to provide full duplex operation, that is, separate chains for transmission
> and reception. Is it possible to run it in the half duplex mode?
>
> The chain in the upper corner of the granddaughter schematics in
> http://code.ettus.com/redmine/**ettus/documents/17<http://code.ettus.com/redmine/ettus/documents/17>is marked TX/RX and it seems like A0 to B1 indicate logical levels for
> different configurations. I believe these are the lines A and B that go
> into U2 HMC174MS8 switch. Are these jumpers or SW controlled?
>
> Is http://www.hittite.com/**content/documents/data_sheet/**hmc174ms8.pdf<http://www.hittite.com/content/documents/data_sheet/hmc174ms8.pdf>to look at for provided isolation, insertion loss, and other related
> characteristics?
>
> Thank you,
>
> --
> Haris Kremo
> TOYOTA InfoTechnology Center Co.,Ltd,
> 6-6-20 Akasaka, Minato-ku
> Tokyo 107-0052, Japan
> Tel: +81-3-5561-8277 Fax: +81-3-5561-8292
> E-mail: hkremo at jp.toyota-itc.com
> URL: http://www.toyota-itc.com/
>
>
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