I am using 2944 USRP which model is X310. We connect the Tx and Rx antenna
ports to the DUT via RF cables. The received power at 5GHz is about 23dB lower
than the one at 1GHz.We adjust gain in USRP to maintain the Rx power level at
different frequencies.N310 USRP has built-in power control functionality.
Hongwei
On Friday, 5 August 2022 at 11:22:19 BST, Cédric Hannotier via USRP-users
<usrp-users@lists.ettus.com> wrote:
On 2022-08-04 08:50 -0400, Marcus D. Leech wrote:
> On 2022-08-04 07:59, henry.powell...@gmail.com wrote:
> >
> > Sorry for misunderstanding. I think this is my fault. But as i mentioned
> > my first question, when i say cable connection, i mean i connected tx
> > port to rx port with cable. To see the device settings clearly, i did
> > this. Also, I have b200.
Sorry, I forgot that part.
> Make certain that you have at least 30dB attenuation in that cable.
> Otherwise you risk one of two things:
>
> o Severe distortion and non-linearity at the receiver
> o Severe damage of the receiver
>
> The power output of an RF amplifier will necessarily vary across its
> frequency range. I would expect that over 100MHz to 6GHz
> that would be perhaps 5-10dB.
For the B200, there is some data on RF performance:
https://kb.ettus.com/images/c/cb/B200_RF_Performance.pdf
Hope that's help.
Regards
--
Cédric Hannotier
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