Hey Andrew, thanks for the input! Glad to get a sanity check :) On Tue, Jul 10, 2012 at 2:30 AM, Andrew Davis <[email protected]>wrote:
> > my J1 port is lower then that of my J2 port! About 30dB lower! > > Are you transmitting out of your J1 port? 30dB sounds like cross talk > on a non-transmitting port. > > >One thing i've started to notice is that as I step up the uhd gain the > readings I get on the spectrum analyser do not appear to linear. > > I'm not sure if this is exactly right, but it has been said before, > the USRP is not testing equipment, it is a radio, so the gains and > frequencies may not be perfectly calibrated. > > On Mon, Jul 9, 2012 at 7:08 AM, Michael Hill <[email protected]> wrote: > > I'm doing a bunch of testing on the USRP N210 with the XCVR2450. > > In particular i'm looking at areas where there is odd behaviour at > extremes > > etc and at trying to put it in context. > > > > One thing i've started to notice is that as I step up the uhd gain the > > readings I get on the spectrum analyser do not appear to linear. > > Is this correct? E.g. if I go up by 10dB, I get about 7 or 8dB increase > in > > the output measured. It of course becomes non-linear as it approaches the > > maximum of 35dB. > > > > Another odd observation i've made with mine is that the power I get > coming > > out of my J1 port is lower then that of my J2 port! About 30dB lower! > > Is this normal? I hope I haven't damaged my device in some way.. :/ > > > > > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > >
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