Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-09 Thread Marcus D. Leech via USRP-users
On 05/09/2019 03:01 PM, Brian Padalino via USRP-users wrote: I'd much prefer to see an IQ constellation diagram. For OFDM it'll just look like a big Gaussian meatball unless you hit some clipping or weirdness, then you'll see it square up or look strange. Brian If "Big Gaussian Meatball"

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-09 Thread Ron Economos via USRP-users
saturation? Thanks, Mike *From:* Brian Padalino *Sent:* Wednesday, May 8, 2019 6:11 PM *To:* Michael Deacon *Cc:* usrp-users@lists.ettus.com *Subject:* Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter What does the signal look like in the time domain? Is

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-09 Thread Brian Padalino via USRP-users
On Thu, May 9, 2019 at 1:03 PM Michael Deacon wrote: > I hope this is what you are looking for. Would clipping here be an > indication of saturation? > Not quite. You may be able to look at the CCDF of the output and see if it hits a brick wall versus the "good" picture. I'd much prefer to

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-08 Thread Brian Padalino via USRP-users
gt; > Mike > > > > *From:* Brian Padalino > *Sent:* Wednesday, May 8, 2019 4:37 PM > *To:* Michael Deacon > *Cc:* usrp-users@lists.ettus.com > *Subject:* Re: [USRP-users] Relationship between IQ values, gain and > noise on B205mini transmitter > > > > On

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-08 Thread Michael Deacon via USRP-users
I added some attenuation. The overload is gone but the condition persists. Thanks, Mike From: Brian Padalino Sent: Wednesday, May 8, 2019 4:37 PM To: Michael Deacon Cc: usrp-users@lists.ettus.com Subject: Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

2019-05-08 Thread Brian Padalino via USRP-users
On Wed, May 8, 2019 at 7:28 PM Michael Deacon via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello, > > > > I have a simple transmitter consisting of a file source connected to a > USRP sink (attached image radio.png). The file contains interleaved > floating point IQ representing a few