Hi Baroch, oh, that's interesting and I must admit I don't really know where to start looking into this, but let's take this top-down: How are you setting the gain, and how are you doing the capturing? My gut feeling tells me there's something in UHD not handling multi- channel gain setting right, but lacking an N310 on my desk right now, I can't just trace this with a debugger. How did you build and install your UHD? Best regards, Marcus
On Wed, 2019-12-25 at 15:29 +0200, Baroch Oren via USRP-users wrote: > Hello. > I've been capturing with N310 on 4 channels simultaneously. A strange > behavioure occurs: > First experiment: capturing on a single channel when all the other 3 > rx channels are terminated, I get a similar captured gain on every > one of the RX channels. > Second experiment: capturing simultaneously, channel 3 (RF2 RX2) > shows a decreased capture gain in about -14db. all other channels > show capture gain similar to first experiment. > Third experiment: capturing simultaneously on 4 channels, all inputs > terminated: thermal noise of same gain on all 4 channels. > > Anyone has any clue for direction to further research this? > > My setup: UHD_3.14.1.HEAD-0-g0347a6d8 on Ubuntu > > Thanks, > Baroch Oren > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
