Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Yeo Jin Kuang Alvin (IA)
Hi Marcus, Noted with thanks! Are there any solutions to these to get the LPF working and solve these "U O L" issues? Thank you in advanced! From: Marcus D. Leech [mailto:mle...@ripnet.com] Sent: Tuesday, 22 May 2018 11:32 AM To: Yeo Jin Kuang Alvin (IA); discuss-gnuradio@gnu.org Subject: Re:

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 11:28 PM, Yeo Jin Kuang Alvin (IA) wrote: Hi all, Thank you! I’ve noticed my mistake. Now I’ve tried both 5000 and 100e3, instead of overflowing “O”, I see lots of “L” late packets. Thank you in advanced! 'L' is from TX side of things. It's a special variant of 'U', where th

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Yeo Jin Kuang Alvin (IA)
Hi all, Thank you! I've noticed my mistake. Now I've tried both 5000 and 100e3, instead of overflowing "O", I see lots of "L" late packets. Thank you in advanced! From: Marcus D. Leech [mailto:mle...@ripnet.com] Sent: Tuesday, 22 May 2018 11:19 AM To: Yeo Jin Kuang Alvin (IA); discuss-gnuradio

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Kevin McQuiggin
Hi Alvin: You need to widen the transition bandwidth, not reduce it! Going from 1000 to 150 Hz will greatly increase the complexity of the filter. Try 5000 Hz to see if you get better performance. Kevin Sent from my iPad > On May 21, 2018, at 20:14, Yeo Jin Kuang Alvin (IA) > wrote: > >

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 11:14 PM, Yeo Jin Kuang Alvin (IA) wrote: Hi Marcus, Thank you for the quick reply! Is there any block in GRC that works with the FPGA in the USRP B210? And I have tried lowering the transition width from 1000 to ~150 but I still see overflow, does this means that the only solu

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Yeo Jin Kuang Alvin (IA)
Hi Marcus, Thank you for the quick reply! Is there any block in GRC that works with the FPGA in the USRP B210? And I have tried lowering the transition width from 1000 to ~150 but I still see overflow, does this means that the only solution to it is to get a faster computer? Thank you in adv

Re: [Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 10:54 PM, Yeo Jin Kuang Alvin (IA) wrote: Hi all, Apparently, I tried connecting the USRP Source to a Low Pass Filter and to a File Sink, I get overflows “OO”. However, when I removed the LPF, there is no overflow. The question is, why is this happening? Is the Low Pass Fil

[Discuss-gnuradio] GNURadio Companion LPF

2018-05-21 Thread Yeo Jin Kuang Alvin (IA)
Hi all, Apparently, I tried connecting the USRP Source to a Low Pass Filter and to a File Sink, I get overflows "OO". However, when I removed the LPF, there is no overflow. The question is, why is this happening? Is the Low Pass Filter in GRC done in the FPGA or in the computer itself? I am

Re: [Discuss-gnuradio] QT Vector sink question?

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 02:50 PM, Glen I Langston wrote: Hello all, Thanks for all the interesting discussion. Very educational. I’ve got a pair of questions concerning the QT vector sink. My application uses the vector sink for plotting and diagnostics of averaged spectra. I’m getting the impression

[Discuss-gnuradio] QT Vector sink question?

2018-05-21 Thread Glen I Langston
Hello all, Thanks for all the interesting discussion. Very educational. I’ve got a pair of questions concerning the QT vector sink. My application uses the vector sink for plotting and diagnostics of averaged spectra. I’m getting the impression that the QT vector sink is using a good fraction

Re: [Discuss-gnuradio] An analog RF question

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 02:33 PM, Eric Brombaugh wrote: Sounds like a fun study. I looked at using some of those ADRF6510 ADC drivers with built-in programmable analog LPFs a while back. They're highly integrated but fairly expensive and really power-hungry. Eric That actually compares fairly well to a

Re: [Discuss-gnuradio] An analog RF question

2018-05-21 Thread Eric Brombaugh
Sounds like a fun study. I looked at using some of those ADRF6510 ADC drivers with built-in programmable analog LPFs a while back. They're highly integrated but fairly expensive and really power-hungry. Eric On 05/21/2018 11:21 AM, Marcus D. Leech wrote: On 05/21/2018 01:59 PM, Dan CaJacob wr

Re: [Discuss-gnuradio] An analog RF question

2018-05-21 Thread Marcus D. Leech
On 05/21/2018 01:59 PM, Dan CaJacob wrote: Hey Marcus, This may not be what you are looking for, but these are awesome. They may be going to space soon :) http://www.newedges2.com/products/SAX239-R2_Datasheet_February-27th-2018.pdf Interesting. Not quite what I was looking for. Basically ju

Re: [Discuss-gnuradio] An analog RF question

2018-05-21 Thread Dan CaJacob
Hey Marcus, This may not be what you are looking for, but these are awesome. They may be going to space soon :) http://www.newedges2.com/products/SAX239-R2_Datasheet_February-27th-2018.pdf On Sun, May 20, 2018 at 10:13 PM li...@lazygranch.com wrote: > I used to work at Maxim, but my dealings wi

Re: [Discuss-gnuradio] Wxgui: Multiple bases have instance lay-out conflict

2018-05-21 Thread Michael Dickens
Hi Ren - I've never seen or heard of this error. Do other flowgraphs work? If they do work, then this issue is most likely specific to just Wx. Given that the gr-wxgui is going away "soon", I haven't installed it recently. I'll try installing GR +wxgui & see if I get the same issue. Maybe someone e

Re: [Discuss-gnuradio] Connecting two USRPs in one laptop in gnuradio companion

2018-05-21 Thread Neel Pandeya
If you're concerned about frequency stability, then you might want to consider using a GPSDO with your B210. --​Neel Pandeya On 21 May 2018 at 04:24, Inkyu Bang wrote: > Dear Neel Pandeya > > I have test in the following setup > > Center frequency: 5.89GHz (I am using the antenna supporting t

Re: [Discuss-gnuradio] Connecting two USRPs in one laptop in gnuradio companion

2018-05-21 Thread Inkyu Bang
Dear Neel Pandeya I have test in the following setup Center frequency: 5.89GHz (I am using the antenna supporting this center frequency) Sampling rate: 5MHz Frequency of sine wave: 1kHz From others’ comments, I realized that cancellation will not be successful if I do not calibrate LO offsets,