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Today's Topics:
1. Foreign Guest Researcher opportunity at NIST (M. Ranganathan)
2. Re: Values graph fft (Julio Hector Aguilar Renteria) (Sam mite)
3. N200 seems totally dead (Sivan Toledo)
4. Re: N200 seems totally dead (Sivan Toledo)
5. Re: N200 seems totally dead (Juha Vierinen)
6. Re: N200 seems totally dead (Sivan Toledo)
7. Re: N200 seems totally dead (Jason Roehm)
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Message: 1
Date: Tue, 16 Apr 2013 14:23:46 -0400
From: "M. Ranganathan" <[email protected]>
To: [email protected]
Subject: [USRP-users] Foreign Guest Researcher opportunity at NIST
Message-ID:
<CAHiu4JNw2UXdT2mf7v45ETSVeBv3W7TN0h9GXyj2pOCNjp===a...@mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"
Hello,
I am posting this with the permission of the list owner :
Foreign Guest Researcher Appointment in Cognitive Radio Research with
Software Defined Radios
==================================================================================
National Institute of Standards and Technology,
U.S. Department of Commerce
The Emerging and Mobile Network Technologies Group in the Information
Technology Laboratory of the U.S. Department of Commerce, National
Institute of Standards and Technology (NIST), is seeking bright and
enthusiastic candidates for a one-year foreign guest researcher appointment
to implement cognitive radio protocols for research in dynamic spectrum
access. This position involves the design, development, and use of
cognitive radio applications on software defined radios. The incumbent
will develop novel cognitive radio protocols; design, implement, and debug
software defined radio applications that execute these protocols; and
evaluate the performance of these protocols on a test-bed using accepted
metrics.
A programmable wireless communication test-bed composed of USRP N210s,
Linux servers, and an RF channel emulator will serve as the platform for
application development and testing. The incumbent will use GNU Radio
and/or other toolkits in conjunction with the USRP. Candidates should have
experience with digital signal processing and programming in Python, C++,
and MATLAB. Experience with GNU Radio and FPGA programming is desired.
The incumbent must work well in a team environment and possess a strong
commitment with the ability to deliver high quality software. Minimum
educational qualifications required for this position are a Bachelor of
Science in Electrical/Computer Engineering, Computer Science, or
equivalent. Graduate students working toward a Master?s or PhD and
postdoctoral researchers are encouraged to apply. This appointment will be
made under the Exchange Visitor Program and is for applicants outside the
U.S. who would come to NIST on a J-1 visa. Email c.v./resume with
references to Dr. Michael Souryal,
[email protected]<https://messaging.nist.gov/owa/redir.aspx?C=vL-240b7Xkqb564_pYW62kfnULNDDtBIqnKL4qJwKa57gYu-oRkHnwrb1Z6VSw0GdkK22Clzf_E.&URL=mailto%3asouryal%40nist.gov>
.
The Emerging and Mobile Network Technologies Group at NIST conducts
performance analysis of communication technologies and protocols to
expedite the development and deployment of standards for emerging mobile
networks. The Group develops performance metrics and modeling
methodologies using commercially available and in-house customized network
modeling, simulation, and testbed tools. More information on the Group?s
activities can be found at
http://www.nist.gov/itl/antd/emntg/<https://messaging.nist.gov/owa/redir.aspx?C=vL-240b7Xkqb564_pYW62kfnULNDDtBIqnKL4qJwKa57gYu-oRkHnwrb1Z6VSw0GdkK22Clzf_E.&URL=http%3a%2f%2fwww.nist.gov%2fitl%2fantd%2femntg%2f>
.
--
M. Ranganathan
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Message: 2
Date: Wed, 17 Apr 2013 08:33:50 +0500
From: Sam mite <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Values graph fft (Julio Hector Aguilar
Renteria)
Message-ID:
<CAPhW9TQXaNXmAF+4-6gjF=VhTd=nzpqufvznt6a_hijpnvp...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
>
> hi all
>
> I want to save the values that make up the graph of the FFT in a text
> file (fft_window.py), but when I print the values shown ([-82, -112 -,
> 100, .... -93, -103]) , not all the values of the FFT.
>
> someone could get all values?
>
>
This is because you might have large points (bins) in your FFT and python
shell is displaying only start and end values. You can use a for loop to
print the values.
for i in abc:
print i
where abc contains all FFT values.
Hope it helps
--
Best Regards,
Sam
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Message: 3
Date: Wed, 17 Apr 2013 12:25:04 +0300
From: Sivan Toledo <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] N200 seems totally dead
Message-ID:
<CAOL_ruG=ob-c-3kfh-g0yes_w_vgfoksdzqy8m8ebst2k9a...@mail.gmail.com>
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One of our N200 seems to have died suddenly. It was working fine and then
the UHD program we were running complained about being unable to send
control packets, we did not get any more samples, and our program exited.
We tried to power cycle the N200 by removing the power adapter and plugging
it back in, but it did not turn on properly. None of the 6 LEDs lights. The
orange LED in the Ethernet connector lights when a cable is plugged it, but
that's it. The fan runs.
We tried to power cycle it a few more times but always got the same result.
We tried to plug in power while S2 is pressed, but the LEDs are still all
off.
The unit was not in the middle of any kind of firmware/image update, just
running normally against a UHD program.
Any advice on what to do next would be appreciated.
Thanks, Sivan
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Message: 4
Date: Wed, 17 Apr 2013 13:36:03 +0300
From: Sivan Toledo <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] N200 seems totally dead
Message-ID:
<CAOL_ruHq5sbP7koRZZjMFxy_V+CrE=u=f5dG6F=v5ujecjw...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Measuring the voltages at the outputs of the regulators showed that the
3.3V regulation is broken. The voltage at J104 is only 1V, not 3.3V. The
1.2V and 2.5V outputs seem fine.
On Wed, Apr 17, 2013 at 12:25 PM, Sivan Toledo <[email protected]> wrote:
> One of our N200 seems to have died suddenly. It was working fine and then
> the UHD program we were running complained about being unable to send
> control packets, we did not get any more samples, and our program exited.
>
> We tried to power cycle the N200 by removing the power adapter and
> plugging it back in, but it did not turn on properly. None of the 6 LEDs
> lights. The orange LED in the Ethernet connector lights when a cable is
> plugged it, but that's it. The fan runs.
>
> We tried to power cycle it a few more times but always got the same
> result. We tried to plug in power while S2 is pressed, but the LEDs are
> still all off.
>
> The unit was not in the middle of any kind of firmware/image update, just
> running normally against a UHD program.
>
> Any advice on what to do next would be appreciated.
>
> Thanks, Sivan
>
>
>
>
>
>
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Message: 5
Date: Wed, 17 Apr 2013 11:12:25 +0000
From: Juha Vierinen <[email protected]>
To: Sivan Toledo <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] N200 seems totally dead
Message-ID:
<cagbkif0dhowrvxfkogrcvy+ukg7fqqqzngaxf-r8ssop4kt...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Have you tried another power supply with the usrp?
We just had one usrp n210 die on us. We traced it down to a failing power
supply (the usrp was a few years old). It couldn't supply the needed 3 amps
any more. When we opened up the supply, we found an expanded capacitor.
juha
On Wed, Apr 17, 2013 at 10:36 AM, Sivan Toledo <[email protected]> wrote:
> Measuring the voltages at the outputs of the regulators showed that the
> 3.3V regulation is broken. The voltage at J104 is only 1V, not 3.3V. The
> 1.2V and 2.5V outputs seem fine.
>
>
> On Wed, Apr 17, 2013 at 12:25 PM, Sivan Toledo <[email protected]> wrote:
>
>> One of our N200 seems to have died suddenly. It was working fine and then
>> the UHD program we were running complained about being unable to send
>> control packets, we did not get any more samples, and our program exited.
>>
>> We tried to power cycle the N200 by removing the power adapter and
>> plugging it back in, but it did not turn on properly. None of the 6 LEDs
>> lights. The orange LED in the Ethernet connector lights when a cable is
>> plugged it, but that's it. The fan runs.
>>
>> We tried to power cycle it a few more times but always got the same
>> result. We tried to plug in power while S2 is pressed, but the LEDs are
>> still all off.
>>
>> The unit was not in the middle of any kind of firmware/image update, just
>> running normally against a UHD program.
>>
>> Any advice on what to do next would be appreciated.
>>
>> Thanks, Sivan
>>
>>
>>
>>
>>
>>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 6
Date: Wed, 17 Apr 2013 14:15:06 +0300
From: Sivan Toledo <[email protected]>
To: Juha Vierinen <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] N200 seems totally dead
Message-ID:
<CAOL_ruHv=82xO+8-HWqFHRBb93Zcsd8yu5=2_ffg11w3_7p...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
No, it's not the external power supply. I have another N200 and both power
supply work fine with the other N200, but the dead unit does not work with
any of them.
On Wed, Apr 17, 2013 at 2:12 PM, Juha Vierinen <[email protected]> wrote:
> Have you tried another power supply with the usrp?
>
> We just had one usrp n210 die on us. We traced it down to a failing power
> supply (the usrp was a few years old). It couldn't supply the needed 3 amps
> any more. When we opened up the supply, we found an expanded capacitor.
>
> juha
>
>
> On Wed, Apr 17, 2013 at 10:36 AM, Sivan Toledo <[email protected]> wrote:
>
>> Measuring the voltages at the outputs of the regulators showed that the
>> 3.3V regulation is broken. The voltage at J104 is only 1V, not 3.3V. The
>> 1.2V and 2.5V outputs seem fine.
>>
>>
>> On Wed, Apr 17, 2013 at 12:25 PM, Sivan Toledo <[email protected]> wrote:
>>
>>> One of our N200 seems to have died suddenly. It was working fine and
>>> then the UHD program we were running complained about being unable to send
>>> control packets, we did not get any more samples, and our program exited.
>>>
>>> We tried to power cycle the N200 by removing the power adapter and
>>> plugging it back in, but it did not turn on properly. None of the 6 LEDs
>>> lights. The orange LED in the Ethernet connector lights when a cable is
>>> plugged it, but that's it. The fan runs.
>>>
>>> We tried to power cycle it a few more times but always got the same
>>> result. We tried to plug in power while S2 is pressed, but the LEDs are
>>> still all off.
>>>
>>> The unit was not in the middle of any kind of firmware/image update,
>>> just running normally against a UHD program.
>>>
>>> Any advice on what to do next would be appreciated.
>>>
>>> Thanks, Sivan
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> [email protected]
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
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Message: 7
Date: Wed, 17 Apr 2013 08:36:21 -0400
From: Jason Roehm <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] N200 seems totally dead
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
One thing that might be worth checking is whether any parts of the board
seem to be abnormally hot. If the 3.3 V regulator is only putting out 1
V, that may be because some device on that net is trying to sink more
current than the regulator can provide. The internal resistance of the
regulator would then cause the voltage to droop. This would typically
only happen if one of the devices on the board has died short. It may
not help you fix the problem, but it might get you some more information.
Jason
On 04/17/2013 06:36 AM, Sivan Toledo wrote:
> Measuring the voltages at the outputs of the regulators showed that
> the 3.3V regulation is broken. The voltage at J104 is only 1V, not
> 3.3V. The 1.2V and 2.5V outputs seem fine.
>
>
> On Wed, Apr 17, 2013 at 12:25 PM, Sivan Toledo <[email protected]
> <mailto:[email protected]>> wrote:
>
> One of our N200 seems to have died suddenly. It was working fine
> and then the UHD program we were running complained about being
> unable to send control packets, we did not get any more samples,
> and our program exited.
>
> We tried to power cycle the N200 by removing the power adapter and
> plugging it back in, but it did not turn on properly. None of the
> 6 LEDs lights. The orange LED in the Ethernet connector lights
> when a cable is plugged it, but that's it. The fan runs.
>
> We tried to power cycle it a few more times but always got the
> same result. We tried to plug in power while S2 is pressed, but
> the LEDs are still all off.
>
> The unit was not in the middle of any kind of firmware/image
> update, just running normally against a UHD program.
>
> Any advice on what to do next would be appreciated.
>
> Thanks, Sivan
>
>
>
>
>
>
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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