Re: [USRP-users] Pulsations on a QPSK transmission

2019-12-21 Thread Marcus Müller via USRP-users
Just to rule out interferers: * the stripes go away when you turn of the USRPs? * Also, the stripes aren't there, either, when you use the Lime on the same 1.011 GHz frequency, exactly? My suspicion is that this is mostly USB3 emissions (those could be, but not necessarily are, happening through

Re: [USRP-users] Pulsations on a QPSK transmission

2019-12-21 Thread Ron Economos via USRP-users
I always thought these pulsations were due to some kind of bug with Gqrx. If you change the FFT size, the rate of pulsation changes. Also, you don't see this on a real spectrum analyzer, even an inexpensive one. Ron On 12/21/19 09:25, Marcus Müller via USRP-users wrote: Just to rule out inter

Re: [USRP-users] Pulsations on a QPSK transmission

2019-12-21 Thread Геннадий Казачёк via USRP-users
Hello, thanks for your attention. > I always thought these pulsations were due to some kind of bug with > Gqrx. If you change the FFT size, the rate of pulsation changes. No, it doesn't. I've tested, FFT size doesn't affect rate of pulsation. > Also, you don't see this on a real spectrum analyzer