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Today's Topics:
1. RFNoC Siggen to RFNoC Radio transmit failing on E310 (EJ Kreinar)
2. Re: NI-USRP 15.0 driver is not working on Ubuntu 16.04
(Marcus M?ller)
3. Signal generator power receiving issue (Jahnavendra Mattipa)
4. Signal generator power receiving issue (Marcus M?ller)
----------------------------------------------------------------------
Message: 1
Date: Fri, 12 May 2017 14:27:08 -0400
From: EJ Kreinar <ejkrei...@gmail.com>
To: "USRP-users@lists.ettus.com" <usrp-users@lists.ettus.com>
Subject: [USRP-users] RFNoC Siggen to RFNoC Radio transmit failing on
E310
Message-ID:
<CADRnH213t=4J_TXtA5OJ+xn=2ssgaqfaij0mj_hxfd3jcr0...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi all,
I'm having some problems with an RFNoC flowgraph trying to transmit a
signal from an RFNoC siggen in the E310. Has anyone seen these issues or
have any ideas for solutions?
Here's a picture of my demo flowgraph. It is based on the
rfnoc_siggen_network_usrp example in gr-ettus/examples.
[image: Inline image 1]
There are two error cases:
1. When "Enable" of RFNoC Siggen is True, I get the following error when
the flowgraph initializes on the E310.
-- Asking for clock rate 1 MHz
-- Actually got clock rate 1 MHz
-- Performing timer loopback test...
UHD Error:
[CE_00_Port_10] Block ctrl bad VITA packet: ValueError: Bad CHDR or
packet fragment
00000048
-- 02400000
-- 7EBE0C7D
-- 7DB5146D
Traceback (most recent call last):
File "rfnoc_siggen_network_usrp.py", line 226, in <module>
main()
File "rfnoc_siggen_network_usrp.py", line 215, in main
tb = top_block_cls(args=options.args)
File "rfnoc_siggen_network_usrp.py", line 89, in __init__
self.uhd_rfnoc_streamer_radio_0.set_rate(decim_rate)
File "/prefix/lib/python2.7/site-packages/ettus/ettus_swig.py", line
2174, in set_rate
return _ettus_swig.rfnoc_radio_sptr_set_rate(self, *args, **kwargs)
RuntimeError: EnvironmentError: IOError: 0/Radio_0 user_reg_read64()
failed: EnvironmentError: IOError: [0/Radio_0] sr_read64() failed:
EnvironmentError: IOError: Block ctrl (CE_00_Port_10) packet parse error -
EnvironmentError: IOError: Expected SID: 02:10>00:00 Received SID:
00:00>00:00
/test#
2. When "Enable" of RFNoC Siggen is False, I can initialize the flowgraph
on the E310 successfully. From a host laptop, I can trigger Enable to True
over the XMLRPC server. The TX indicator LED on the E310 turns Red, but a
spectrum analyzer shows a totally incorrect signal... No matter what the TX
gain or siggen waveform is set to, I get a few distorted peaks at -70 dB
power.
A couple extra notes:
1. Everything works correctly by enabling the software signal source (shown
in the screenshot) and disabling the rfnoc siggen. Now we are generating
baseband samples in software and sending to PL-- which works fine.
2. The DUC does not affect this behavior. I see the same results if I
generate samples at 1 MHz from the siggen and output straight to the Radio.
Anyone else seen this behavior?? It suggests to me there's potentially some
incompatibility with the RFNoC Siggen for the E300s?
EJ
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Message: 2
Date: Sat, 13 May 2017 14:00:52 +0200
From: Marcus M?ller <marcus.muel...@ettus.com>
To: usrp-users@lists.ettus.com
Subject: Re: [USRP-users] NI-USRP 15.0 driver is not working on Ubuntu
16.04
Message-ID: <536e8e79-f925-9767-5a55-f1800e57c...@ettus.com>
Content-Type: text/plain; charset="windows-1252"
Hello Mr. Stroh,
I don't have a Ubuntu machine at hand to test myself, but:
what's the kernel version you're running (`uname -r`)? Might be that the
NI drivers don't support that kernel (yet).
Best regards,
Marcus M
On 11.05.2017 12:15, Dennis Stroh via USRP-users wrote:
> Hi,
>
> I want to connect a USRP X300 via PCIe to achieve high data throughput.
> I installed and updated the NI-USRP 15.0 driver by following the steps
> of the description in the USRP Manual.
>
> However, the update failed and the driver is not properly working.
>
> What should I do to make this configuration work?
>
> Kind regards
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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Message: 3
Date: Sat, 13 May 2017 20:22:22 +0530
From: Jahnavendra Mattipa <jahna.mattipa2...@gmail.com>
To: usrp-users@lists.ettus.com, usrp-users-requ...@lists.ettus.com,
umashan...@tenettech.com, discuss-gnura...@gnu.org,
pa...@tenettech.com
Cc: pparva...@narl.gov.in
Subject: [USRP-users] Signal generator power receiving issue
Message-ID:
<CAH5NE-abWh7Z+VYXgBWprqA=zxtju8qzbt6dd9dxzskwujb...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello all,
I have to receive the Satellite data through the antenna and it is a
secondary thing. Before going to check the satellite data i have to check
the signal generator because they both are doing same processing. So, i
recently test the signal generator power using the USRP. Here i am getting
one issue is that when i giving -40dB gain value to the USRP from the
signal generator the wave is showing the received data is -36dB. One more
signal is -63dB and i am receiving the -39dB. There is a small difference
between receiving data when compared to input data.
I have to know what is the USRP gain and how it is processing the
signal generator or satellite data? I am giving the some power from signal
generator and what happens if i change the gain in "USRP Source"? I noted
the data from -110dB to +110dB and the receiving data is not changing from
-110dB to 0dB, it is changing from 0dB to 50dB. The same process is
continued for -63dB also.
Can anyone kindly help me to solve this issue! If anyone has
advices and comments, they would be greatly appreciated.
Best Regards,
M.Jahnavendra
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Message: 4
Date: Sat, 13 May 2017 17:20:54 +0200
From: Marcus M?ller <marcus.muel...@ettus.com>
To: Jahnavendra Mattipa <jahna.mattipa2...@gmail.com>,
usrp-users@lists.ettus.com, umashan...@tenettech.com,
pa...@tenettech.com
Cc: pparva...@narl.gov.in
Subject: [USRP-users] Signal generator power receiving issue
Message-ID: <fbe8b2a2-18cc-25fa-d355-d49427f63...@ettus.com>
Content-Type: text/plain; charset="windows-1252"
Dear Jahnavendra,
this doesn't mention GNU Radio, and generally seems unrelated to GNU
Radio especially. I'm hence only replying on usrp-users@lists.ettus.com,
and not on the GNU Radio mailing list. It's advisable not to post the
same issues to multiple lists at once, unless it really belongs on all
lists ? many people will simply ignore such emails as spam. I'm
certainly starting to do that with your mails if this continues!
On the topic of receive power:
I must admit I don't fully understand what you're asking.
As I've pointed out to you before [1], the USRPs are *not* calibrated
measurement equipment. Sadly, you never reacted to that ? instead, every
few days, you basically ask a very closely related question.
That means that the digital numbers you get out of them are "relative to
full ADC scale", which means a different thing for every frequency,
gain, bandwidth, sampling rate, temperature.
> I have to know what is the USRP gain and how it is processing
> the signal generator or satellite data? I am giving the some power
> from signal generator and what happens if i change the gain in "USRP
> Source"? I noted the data from -110dB to +110dB and the receiving
> data is not changing from -110dB to 0dB, it is changing from 0dB to
> 50dB. The same process is continued for -63dB also.
I'm sorry, but this is really not anything that we can decipher. You
just state numbers, but never explain what they mean in your system,
that *you* are sitting in front of, and *we* never saw!
So, the questions you should answer are
* what signal?
* what does "data" mean, here?
* What is your signal processing doing?
* about what frequency, bandwidth, sampling rate, gains and most
importantly, what method of defining digital power (which, again, will
only be *proportional* to physical power for any of these settings, but
is *not* calibrated) do you use?
I know this sounds kind of harsh, and I'd very much like to apologize
beforehand, but: To me, it really looks like you're struggling with the
very basics of what things like analog power, a digital signal,
analog-to-digital conversion, gain and dB are. Whatever you're doing
might be a bit over your head.
Again, as pointed out before [2], it's really no shame to not know
everything!! We're all on a pretty much lifelong journey to learn. I see
that you're always taking very nice Tenettech and NARL people into CC: ?
so I assume you know them personally, and probably work in the same lab
or building as them. That would be a perfect chance!
My experience with being stuck with a problem is this:
It's best if you can find a person ? it doesn't even have to be a
skilled person ? and explain, in every step, and in as much detail as
possible, what you're doing. Try to communicate a bigger picture of what
you're doing. Ask them to respond with critical questions, and ask them,
afterwards, to tell you what they think sounded like you weren't
entirely sure of!
Of course, the more the person you're asking understands what you're
doing, the easier it is for them to identify the "difficult" parts. On
the other hand, the more "amateur" the person you're asking is, the more
you'll be able to practice the art of telling details from "the bigger
picture", and to divide your problem into clearer, easier-to-research
parts :)
So, maybe, do both: first do a walkthrough with a skilled person
(supervisor? advanced radio communications student?), and then one with
a person who doesn't understand what you're trying to do at all (quite
literally: your grandma might be a very good pick. If you can explain
something to your grandma, without raising a single one of her eyebrows,
you've become a master of the art of explaining stuff by focussing on
the important parts. Unless, of course, your grandma is a communication
engineer. My grandmas never were, so I might be extrapolating this to
yours).
Best regards, and all the best,
Marcus
[1]
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2017-April/024665.html
[2] http://lists.gnu.org/archive/html/discuss-gnuradio/2017-05/msg00002.html
On 13.05.2017 16:52, Jahnavendra Mattipa wrote:
> Hello all,
> I have to receive the Satellite data through the antenna and it is
> a secondary thing. Before going to check the satellite data i have to
> check the signal generator because they both are doing same
> processing. So, i recently test the signal generator power using the
> USRP. Here i am getting one issue is that when i giving -40dB gain
> value to the USRP from the signal generator the wave is showing the
> received data is -36dB. One more signal is -63dB and i am receiving
> the -39dB. There is a small difference between receiving data when
> compared to input data.
> I have to know what is the USRP gain and how it is processing
> the signal generator or satellite data? I am giving the some power
> from signal generator and what happens if i change the gain in "USRP
> Source"? I noted the data from -110dB to +110dB and the receiving
> data is not changing from -110dB to 0dB, it is changing from 0dB to
> 50dB. The same process is continued for -63dB also.
> Can anyone kindly help me to solve this issue! If anyone has
> advices and comments, they would be greatly appreciated.
>
> Best Regards,
> M.Jahnavendra
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> discuss-gnura...@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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