Yeah, You are right, My initial thougth was, UHD already needs to scale whatever comes in to the DAC range. If it could take in account this extra scaling I could save the constant multiplier block.
Best Regards. Em ter, 3 de dez de 2019 15:24, Müller, Marcus (CEL) <muel...@kit.edu> escreveu: > I'd recommend not overestimating the workload of scaling outside of UHD > – UHD still has to do that multiplication! So, scaling e.g. your > constellation or your pulse-shaping filter would make at least as much > sense. > > On Tue, 2019-12-03 at 14:11 -0300, Wheberth Damascena Dias wrote: > > Hi Marcus, I > > > > I am planning to give a try to the GnuRadio 3.8 PPA. We are developing > some OOT blocks and some rework may be needed to do so. > > > > I will take a look at the code, but I am inclined to change my > application to eliminate the need of scaling in real time (scalling the QAM > symbols for example) > > > > Regarding the USRP I am using a pair of X310. > > > > Thank you very much. > > Wheberth > > > > > > Em ter, 3 de dez de 2019 13:26, Müller, Marcus (CEL) <muel...@kit.edu> > escreveu: > > > Uhhhh that's an ancient version of GNU Radio. Do you use any other UHD- > > > linking software, or can you try our new PPA that would give you a > > > modern GNU Radio 3.8.0.0? > > > > > > https://launchpad.net/~gnuradio/+archive/ubuntu/gnuradio-releases > > > > > > Anyway, for most USRPs "fullscale" actually should do some scaling (if > > > you're so inclined, look for "_host_extra_scaling" in the UHD source > > > code). > > > > > > What is the USRP you're using? > > > > > > Best regards, > > > Marcus > > > > > > On Tue, 2019-12-03 at 08:41 -0300, Wheberth Damascena Dias wrote: > > > > Hi all, not sure if I should send this here or at USRP list. > > > > > > > > I am trying to set the "fullscale" as a stream parameter of the USRP > Sink block, but it have no effect. The idea is to avoid the use aof one > block to scale the samples to [-1.0, +1.0] range May I be missing something? > > > > > > > > For reference I am using GnuRadio 3.7.11 with libuhd 3.10.3 (All > stock from Ubuntu 18.04). > > > > Thank you very > > > > > > > > > > > > > > > > -- > > > > Wheberth Damascena Dias > > > > _______________ _____ _____ __ ___ __ _ _ _ _ > > > > http://www.linkedin.com/in/wheberth > > > > e-mail:whebe...@gmail.com > > > > >
