[USRP-users] Phase Noise for USRP N200 with LFTX/LFRX

Matt Ettus matt at ettus.com
Mon Dec 8 18:05:47 EST 2014


With the LFRX and LFTX, there is no mixer, so all phase noise is from the
ADC clock.  The oscillator used is a CVHD-950 from Crystek and you can find
the phase noise spec for it on their web site.

Matt

On Mon, Dec 8, 2014 at 2:11 PM, khalid.el-darymli via USRP-users <
usrp-users at lists.ettus.com> wrote:

> Hi,
>
> According to the specs provided in [1], the RF performance of USRP
> N200/N201 is characterized for the WBX daughter-board. Particularly, phase
> noise measurements are given for three offsets from a center frequency of
> 1.8 GHz.
>
> My question is, are there any such measurements for the LFTX/LFRX
> daughter-board?
>
> If not, is there a recommended procedure for doing these measurements?
> Among others, I am particularly concerned with the phase noise and its
> short-term effect on my Doppler measurements.
>
>
> [1]
> https://www.ettus.com/content/files/07495_Ettus_N200-210_DS_Flyer_HR_1.pdf
>
> Thanks,
> Khalid
>
>
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>
>
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