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From: Martin Braun
Subject: Re: [Discuss-gnuradio] TX-POWER USRP N210 AND WBX DOUGHTERBOARD
Date: Tue, 22 Jul 2014 10:45:48 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0


the actual tx power depends on a lot of parameters, and it is not a
simple setting. For one thing, it depends a lot on the actual signal you
are generating. If you need a very specific output power, you need to
calibrate your setup with a tool such as a spectrum analyzer.

In general, the 100 mW (or 20 dBm) is the max possible tx power. The
gain will reduce that. Obviously, the noise figure is not relevant for Tx.


On 07/22/2014 10:13 AM, Simone Ciccia S210664 wrote:
> Hi at all,
> I have problem to understand how an USRP used as a trasmitter works in term
> of transmitted power when we fix a tx_gain.
> Let me explain better: 
> - The WBX Daughterboard is a wide bandwidth transceiver that provides up to
> 100 mW of output power and a noise figure of 5 dB. (extracted from manual)
> - UHD USRP SINK block (in gnuradio) allows to set the tx_gain(dB)
> Which is the relation between these parameters???
> If I want to set a specific transmitted power???
> Thanks in advance,
> _______________________________________
> Ing. Simone Ciccia, PhD Student
> Antenna and EMC Lab (LACE),
> Politecnico di Torino,
> C.so Duca degli Abruzzi 24, 10129 Torino, Italy
> address@hidden
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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