[USRP-users] Output power of E310

James Humphries james.humphries at ettus.com
Fri Mar 11 10:57:33 EST 2016


Hi Claudio,

Which antenna port are you using? And you are setting the center freq with
the --freq option?

-Trip

On Fri, Mar 11, 2016 at 6:08 AM, Claudio Cicconetti via USRP-users <
usrp-users at lists.ettus.com> wrote:

> Dear all,
> We are working on a testbed for satellite communication where the
> transmitter is an Ettus E310. Since we are dealing with the link budget,
> we need to understand the maximum power that we can achieve.
>
> We have run a few experiments to gather a rough order of magnitude using
> the tx_waveforms example (with --ampl 0.7 and --gain 89.8) and measuring
> the output power with a spectrum analyzer.
>
> We have found the following results:
>
> 70  MHz -> -6 dBm
> 1.5 GHz -> -17 dBm
> 3   GHz -> 10 dBm <<< as per datasheet
> 6   GHz -> 4 dBm
>
> The sample rate does not seem to play a role in the experiments.
>
> Do these results make sense to you? For instance, we would have expected
> to have a monotone relationship between frequency and power...
>
> More important: since our application is expected to work at 1.5 GHz
> (which accidentally achieves minimum output in our experiments) is there
> any way to increase the output power in that frequency range?
>
> Best regards,
> Claudio
>
> --
> Claudio Cicconetti, PhD
> Software Engineer - MBI S.r.l. - Pisa, Italy
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users at lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
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