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Today's Topics:
1. Re: USRP X310 at 5.8GHz (Evert)
2. Re: How to install USRP B200 image on Raspberry Pi 3
([email protected])
3. E310 FPGA rebuild not able to complete (Jason Matusiak)
4. Re: E310 FPGA rebuild not able to complete (Jonathon Pendlum)
5. Performance Data for TwinRX (Perelman, Nathan)
6. How to implement the timing reception of USRP B210? (Bob)
7. Re: How to implement the timing reception of USRP B210?
(Derek Kozel)
8. Re: E310 FPGA rebuild not able to complete (Jason Matusiak)
9. USRP command port (Usman Haider)
10. Re: USRP command port (Steven Knudsen)
----------------------------------------------------------------------
Message: 1
Date: Wed, 19 Apr 2017 18:01:17 +0200
From: Evert <[email protected]>
To: [email protected], [email protected]
Subject: Re: [USRP-users] USRP X310 at 5.8GHz
Message-ID: <[email protected]>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"
Hi Li,
Is the modulation type the same? On 2,4 Ghz qpsk is mostly used and on 5
ghz it is OFDM.
The PAR ( peak to average ratio ) of QPSK and OFDM are totally different.
The average for OFDM is 17dB and the average PAR for QPSK is 6 dB. Which
means that OFDM has 11 dB lower power output to preserve distortion on
the same AMP.
BR
Evert
Op 18-4-2017 om 12:08 schreef chu li via USRP-users:
> Hello,
>
> I am trying to transmit ofdm data from a file at 50MS/s using the USRP
> X310 with CBX 120, when I transmit at 2.45 GHz, I got a good signal,
> but at 5.8GHz, the signal is weakened, even use cable transmission,
> the result is the same. Anybody knows the reasons?
>
> I use uhd 003.009.003 and 10Gigabit Ethernet.
>
> Best regards,
> Li
>
>
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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Message: 2
Date: Wed, 19 Apr 2017 12:27:28 -0400
From: [email protected]
To: Ankur Vora <[email protected]>
Cc: [email protected]
Subject: Re: [USRP-users] How to install USRP B200 image on Raspberry
Pi 3
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
What actually happens when you run:
sudo uhd_images_downloader
That downloads the matched-to-UHD-software-version images into your
images directory.
Then, once that happens successfully, what happens when you:
uhd_usrp_probe --args type=b200
On 2017-04-19 09:32, Ankur Vora via USRP-users wrote:
> Hi ,
>
> I am able to install GNU Radio on Raspbery Pi3 with Raspbian OS but when I
> try to download image it doesnt installed. Can somebody help me how to
> install USRP B200 image that will work on Raspberry Pi.
>
> Thanks,
> Ankur
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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Message: 3
Date: Wed, 19 Apr 2017 14:59:30 -0400
From: Jason Matusiak <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] E310 FPGA rebuild not able to complete
Message-ID:
<[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I am curious how on the edge the E310 FPGA build is (particularly the
RFNoC one) and whether there is a known solution to completing a build?
I was completing builds fine the other day, now it is failing for not
enough LUTs. I tried doing a brand new fresh build and it still fails
(I haven't touched the code at all). Is it so far on the edge that the
tools can /sometimes/ complete and other times not?
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Message: 4
Date: Wed, 19 Apr 2017 15:07:50 -0500
From: Jonathon Pendlum <[email protected]>
To: Jason Matusiak <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] E310 FPGA rebuild not able to complete
Message-ID:
<cagdo0uqkbl3iggf_j0r_clzexsh500kca9howvpunzqjxfw...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Jason,
How much RAM does your build machine have? Sometimes builds on machines
with inadequate RAM will fail.
On Wed, Apr 19, 2017 at 1:59 PM, Jason Matusiak via USRP-users <
[email protected]> wrote:
> I am curious how on the edge the E310 FPGA build is (particularly the
> RFNoC one) and whether there is a known solution to completing a build?
>
> I was completing builds fine the other day, now it is failing for not
> enough LUTs. I tried doing a brand new fresh build and it still fails (I
> haven't touched the code at all). Is it so far on the edge that the tools
> can *sometimes* complete and other times not?
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 5
Date: Wed, 19 Apr 2017 21:31:01 +0000
From: "Perelman, Nathan" <[email protected]>
To: Ben Hilburn via USRP-users <[email protected]>
Subject: [USRP-users] Performance Data for TwinRX
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Is there performance data for TwinRX similar to the data posted here for other
radio boards?: https://files.ettus.com/performance_data
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Message: 6
Date: Thu, 20 Apr 2017 16:38:49 +0800 (GMT+08:00)
From: Bob <[email protected]>
To: usrp-users <[email protected]>
Subject: [USRP-users] How to implement the timing reception of USRP
B210?
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Hello,
We want to get the signal at a fixed time, for example, now is
1492674460.0017879009(the time from GPS) and we want to get the signal at
1492674540(int), how to do it? Of course, the more accurate the better, the
deviation in milliseconds(<0.1ms).
Need to modify FPGA in USRP?
Or it can be achieved in the GNU Radio?
Is there a simpler way to implement it?
Thank you very much for your answers. I am looking forward to your reply as
soon as possible and as detailed as possible.
Thanks!
Bob
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Message: 7
Date: Thu, 20 Apr 2017 10:28:11 +0100
From: Derek Kozel <[email protected]>
To: Bob <[email protected]>
Cc: usrp-users <[email protected]>
Subject: Re: [USRP-users] How to implement the timing reception of
USRP B210?
Message-ID:
<CAA+K=tsM92_ugat+8KfvO-U99569sH5mdDL03MfQMFfKBX==b...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello Bob,
I recommend reading the API guide and user manual for UHD. Additionally
several of the example programs are useful references for timing and
synchronization.
http://files.ettus.com/manual/page_sync.html
https://github.com/EttusResearch/uhd/blob/master/host/examples/rx_timed_samples.cpp
Regards,
Derek
On Thu, Apr 20, 2017 at 9:38 AM, Bob via USRP-users <
[email protected]> wrote:
> Hello,
>
> We want to get the signal at a fixed time, for example, now is
> 1492674460.0017879009(the time from GPS) and we want to get the signal at
> 1492674540(int), how to do it? Of course, the more accurate the better, the
> deviation in milliseconds(<0.1ms).
> Need to modify FPGA in USRP?
> Or it can be achieved in the GNU Radio?
> Is there a simpler way to implement it?
>
> Thank you very much for your answers. I am looking forward to your
> reply as soon as possible and as detailed as possible.
> Thanks!
>
> Bob
>
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 8
Date: Thu, 20 Apr 2017 08:55:13 -0400
From: Jason Matusiak <[email protected]>
To: Jonathon Pendlum <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] E310 FPGA rebuild not able to complete
Message-ID:
<[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I have 16G of RAM, I would think that would be enough, but maybe not.
Do you have a recommendation for minimum amounts?
On 04/19/2017 04:07 PM, Jonathon Pendlum wrote:
> Jason,
>
> How much RAM does your build machine have? Sometimes builds on
> machines with inadequate RAM will fail.
>
> On Wed, Apr 19, 2017 at 1:59 PM, Jason Matusiak via USRP-users
> <[email protected] <mailto:[email protected]>> wrote:
>
> I am curious how on the edge the E310 FPGA build is (particularly
> the RFNoC one) and whether there is a known solution to completing
> a build?
>
> I was completing builds fine the other day, now it is failing for
> not enough LUTs. I tried doing a brand new fresh build and it
> still fails (I haven't touched the code at all). Is it so far on
> the edge that the tools can /sometimes/ complete and other times not?
>
> _______________________________________________
> USRP-users mailing list
> [email protected] <mailto:[email protected]>
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> <http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com>
>
>
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Message: 9
Date: Thu, 20 Apr 2017 20:32:59 +0500
From: Usman Haider <[email protected]>
To: GNURadio Discussion List <[email protected]>
Cc: [email protected]
Subject: [USRP-users] USRP command port
Message-ID:
<CANxWOTbsbX_=-Gxhtn0kT2=85t7unf7hb7gv9a5nug6tpk4...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi,
I want to know is it possible to send the "set_time_next_pps" and
"get_time_last_pps" commands using command port of the usrp sink block?
--
Usman
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Message: 10
Date: Thu, 20 Apr 2017 09:36:49 -0600
From: Steven Knudsen <[email protected]>
To: Usman Haider <[email protected]>
Cc: GNURadio Discussion List <[email protected]>, USRP-users
<[email protected]>
Subject: Re: [USRP-users] USRP command port
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Last I checked, the answer is no. I wanted to do the same thing last year and
ended up modifying the source for the sink/source blocks.
However, I later turned away from that approach and instead got a pointer to
the USRP source/sink block inside one of my custom blocks at runtime and
accessed the time commands that way.
Have a look at the source and you?ll see what can and cannot be accessed via
the command port.
good luck,
steven
Steven Knudsen, Ph.D., P.Eng.
www. techconficio.ca
www.linkedin.com/in/knudstevenknudsen
Du bist die Aufgabe. Kein Sch?ler weit und breit. - Franz Kafka
> On Apr 20, 2017, at 09:32, Usman Haider via USRP-users
> <[email protected]> wrote:
>
> Hi,
>
> I want to know is it possible to send the "set_time_next_pps" and
> "get_time_last_pps" commands using command port of the usrp sink block?
>
>
> --
> Usman
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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