Re: [USRP-users] B200 Overrun

[Rensi Mathew via USRP-users]

 @Marcus Muller
What are the settings of usrp_spectrum_sense that you use?
Sampling rate :16e6Min_freq 2.4e9max_freq 2.5e9BW 15.625e3 Hz
FFT 1024
Rensi

On Monday, 6 May, 2019, 1:20:20 am IST, Marcus Müller 
 wrote:  
 
 So, what are the options with which you run usrp_spectrum_sense?


On Sun, 2019-05-05 at 19:23 +, Rensi Mathew via USRP-users wrote:
> Yes USB 3.0. 
> 
> The OS is Ubuntu 16.04 LTS 64-bit
> Intel® Core™ i5-4570 CPU @ 3.20GHz × 4 
> Disk 309.6 GB
> Memory 3.6 GiB
> 
> Could it because of memory problem?
> The yellow/orange light in the system blinks when USRP runs(showing
> heavily loaded).
> 
> Rensi
> On Saturday, 4 May, 2019, 10:09:03 am IST, Robin Coxe <
> robin.c...@ettus.com> wrote:
> 
> 
> Are you using USB 3.0?  USB 2.0 will max out at about 8 Ms/s.  
> 
> 
> 
> Robin Coxe | Chief R&D Program Manager, SDR | Santa Clara, CA |
> 408.610.6363
>  
> From: USRP-users  on behalf of
> Rensi Mathew via USRP-users 
> Sent: Friday, May 3, 2019 9:17 PM
> To: Vsr Ravi via USRP-users
> Subject: [USRP-users] B200 Overrun
>  
> Dear sir
> I am using B200 SDR to run the program usrp_spectrum_sense.py with a
> sampling frequency of 16e6.
> I think I am using a fairly low sampling rate.
> Still I am getting some ''.
> 
> Could someone tell me the possible reasons for the same? And how I
> can avoid the same?
> 
> Thanking you
> Rensi Sam
> 
> ___
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

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Re: [USRP-users] How to periodically write files using USRP and GNUradio

[GhostOp14 via USRP-users]

I folks, to complete the timing set, I also just added another timer module
to gr-filerepeater.  This one you can give a time-of-day
(hours/minutes/seconds) and a duration and it'll generate a positive state
transition when the specified time is reached every day, then a 0 state
transition when the specified duration expires.  So if you wanted to write
to a file starting at 3am for 15 minutes, this would be the way to do it
without having to wake up!



On Thu, May 2, 2019 at 9:35 AM GhostOp14  wrote:

> Ali, I just pushed a couple of updates.  Let's see if that fixes it for
> you.
>
> I added:
> 1. [Timer] Some thread safety to the timer module.  I also noticed in my
> flowgraph if I went to the top block options and turned on "realtime
> scheduling" it was generally more accurate on the timing (makes sense).
> 2. [File Sink] Added a proper gnuradio stop() function to make sure files
> get properly closed on exit. (Burns me every time swig doesn't
> guarantee that C++ destructors get called so you really need to clean up in
> stop().  I just get lazy sometimes)
>
> Anyway do a fresh git pull and let me know if that fixes any of your
> issues or if you still experience them.
>
>
>
> On Wed, May 1, 2019 at 8:52 PM GhostOp14  wrote:
>
>> Thanks Ali,
>>
>> I'll take a look at what you found with inconsistencies and see if I can
>> hunt them down.
>>
>>
>>
>> On Wed, May 1, 2019 at 5:35 PM Ali Dormiani 
>> wrote:
>>
>>> Hello GhostOp14 and USRP users,
>>>
>>> Your oot blocks are amazing. They do exactly what we need in a clean
>>> way. In testing, we have found that there are rare anomalies though (occur
>>> like a rare Poisson process).
>>>
>>> 1. Sometimes the advanced file sink will create an empty file of 0
>>> bytes.
>>>
>>> 2. Sometimes the state timer messes up. We avoid a runaway data capture
>>> by using the 'max file size' parameter in the advanced file sink.
>>>
>>> Overall, this solution is very good and eliminates a lot of variables
>>> from our experiments. All of our USRP devices are initialized once and
>>> constantly stream data (only some of which is saved). Our phase calibration
>>> is a lot more consistent now.
>>>
>>> Thank you again for providing these oot blocks on Github. My own custom
>>> embedded python block was inelegant and inconsistent.
>>>
>>> Cheers,
>>>
>>> Ali
>>>
>>>
>>> On Wed, May 1, 2019 at 6:19 AM GhostOp14 via USRP-users <
>>> usrp-users@lists.ettus.com> wrote:
>>>
 Morning everyone, not sure my note yesterday hit the list correctly so
 I'm trying again.

 Mark: I have a solution for you.  I added a new block yesterday to
 gr-filerepeater (pybombs or github).  There's now a state timer block
 that'll generate a message based on block-specified timing.  Trigger time,
 cycle time, etc.  gr-filerepeater also has a new file sink block I've added
 in the past couple of weeks specifically to address the same kind of
 problem.  You can feed the timer msg out to the new sink msg in.  The new
 block will then key off the state (1/0) in the msg metadata and start/stop
 writing to a file.  You can specify a directory and a base file name, then
 every time a new file write is started it'll append a timestamp.  Should
 exactly match up to what you're trying to accomplish.  I'll post on the
 gnuradio list as well since they're gnuradio blocks.



 On Mon, Apr 29, 2019 at 8:24 PM Marcus D. Leech via USRP-users <
 usrp-users@lists.ettus.com> wrote:

> On 04/29/2019 08:08 PM, Mark Wagner via USRP-users wrote:
> > Hey all,
> >
> > I'd like to know how to write short files of streamed USRP data
> > periodically using GNUradio. For instance, I'd like the USRP to
> > automatically record 5 seconds of data every 10 minutes. It does not
> > matter to me whether the USRP is constantly on and most of the data
> is
> > being discarded, or if the USRP wakes up every 10 minutes to record
> > the data before sleeping. Whichever is easiest to achieve is fine by
> > me. Does anyone have experience doing this kind of thing?
> >
> > -Mark
> >
> >
> >
> > --
> > Mark Wagner
> > University of California San Diego
> > Electrical and Computer Engineering
> >
> >
> If you're using Gnu Radio, you can simply use the file sink, and have
> it
> record to "/dev/null" most of the time, then have something (perhaps
> via
>the XMLRPC built-in feature) change the filename to whatever your
> desired filename is, and then revert it back to "/dev/null".
>
> I think I said the same thing on the discuss-gnuradio mailing list a
> few
> days ago.
>
> The usrp-users mailing list isn't the best place to ask Gnu Radio
> questions, a question like this, which is inherently radio-type
> agnostic, probably
>belongs on the discuss-gnuradio mailng list, because it's more
> about
> "how do

Re: [USRP-users] B200 Overrun

[Marcus Müller via USRP-users]

So, what are the options with which you run usrp_spectrum_sense?


On Sun, 2019-05-05 at 19:23 +, Rensi Mathew via USRP-users wrote:
> Yes USB 3.0. 
> 
> The OS is Ubuntu 16.04 LTS 64-bit
> Intel® Core™ i5-4570 CPU @ 3.20GHz × 4 
> Disk 309.6 GB
> Memory 3.6 GiB
> 
> Could it because of memory problem?
> The yellow/orange light in the system blinks when USRP runs(showing
> heavily loaded).
> 
> Rensi
> On Saturday, 4 May, 2019, 10:09:03 am IST, Robin Coxe <
> robin.c...@ettus.com> wrote:
> 
> 
> Are you using USB 3.0?  USB 2.0 will max out at about 8 Ms/s.  
> 
> 
> 
> Robin Coxe | Chief R&D Program Manager, SDR | Santa Clara, CA |
> 408.610.6363
>  
> From: USRP-users  on behalf of
> Rensi Mathew via USRP-users 
> Sent: Friday, May 3, 2019 9:17 PM
> To: Vsr Ravi via USRP-users
> Subject: [USRP-users] B200 Overrun
>  
> Dear sir
> I am using B200 SDR to run the program usrp_spectrum_sense.py with a
> sampling frequency of 16e6.
> I think I am using a fairly low sampling rate.
> Still I am getting some ''.
> 
> Could someone tell me the possible reasons for the same? And how I
> can avoid the same?
> 
> Thanking you
> Rensi Sam
> 
> ___
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com


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Re: [USRP-users] B200 Overrun

[Rensi Mathew via USRP-users]

 Yes USB 3.0. 

The OS is Ubuntu 16.04 LTS 64-bit
Intel® Core™ i5-4570 CPU @ 3.20GHz × 4 
Disk 309.6 GB
Memory 3.6 GiB
Could it because of memory problem?The yellow/orange light in the system blinks 
when USRP runs(showing heavily loaded).
RensiOn Saturday, 4 May, 2019, 10:09:03 am IST, Robin Coxe 
 wrote:  
 
 Are you using USB 3.0?  USB 2.0 will max out at about 8 Ms/s.  


Robin Coxe | Chief R&D Program Manager, SDR | Santa Clara, CA | 408.610.6363 
From: USRP-users  on behalf of Rensi Mathew 
via USRP-users 
Sent: Friday, May 3, 2019 9:17 PM
To: Vsr Ravi via USRP-users
Subject: [USRP-users] B200 Overrun Dear sirI am using B200 SDR to run the 
program usrp_spectrum_sense.py with a sampling frequency of 16e6.I think I am 
using a fairly low sampling rate.
Still I am getting some ''.
Could someone tell me the possible reasons for the same? And how I can avoid 
the same?
Thanking youRensi Sam

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Re: [USRP-users] B210 mini I/Q imbalance?

[Marcus D. Leech via USRP-users]

On 05/05/2019 01:12 PM, Brian Padalino wrote:

Since it's AM, try shifting your center frequency by a little bit.

Extract the envelope the same way, though.

My thought is the DC cancellation circuitry in the 9361 is killing 
your AM waveform, so use a low-IF approach instead.


Brian
You beat me to it.  Yes, this will be true of most direct-conversion 
architectures--there will be DC-offset removal in the analog
  (or digital) pathways before samples are delivered to the host. That 
removal process will turn the DC anomaly from a large
  spur to a notch, so if you are doing narrow-band AM demodulation at 
"DC" in the complex signal domain, some of that signal

  will have  been removed.   Offset tuning eliminates this issue.




On Sun, May 5, 2019 at 1:05 PM franz kurniawan via USRP-users 
mailto:usrp-users@lists.ettus.com>> wrote:


I reduced to -40db, -50db and have the same result..

I attached the pictures of b200mini vs other SDR with the same
signal generator..

I expect the same result with the 'other SDR' result..
The IQ data of b200 is seems to be incorrect (imbalance? )

I have tried the uhd of these version :
v3.14.0.0-rc3 ,
release_003_007_001,
release_003_010_001_000

But all have the same result..

I tried to disable the set_auto_iq_balance to both false and true,
but have no effect..

Thank you

On May 5, 2019 11:27 PM, "Marcus D Leech" mailto:patchvonbr...@gmail.com>> wrote:

-20dBM is loud. Try backing the generator down to -40dBm


Sent from my iPhone

On May 5, 2019, at 12:14 PM, franz kurniawan
mailto:digitalturtle2...@gmail.com>> wrote:


I set the generator at -20db and b200 gain at 50..
I check that there is no cutoff at the usrp output and the
input to AM demod block..

Below are the setting of uhd block in gnuradio
Samp rate 500k
Output type float32
Sync PC clock
Clock rate 10 Mhz external
Freq 121MHz
Gain 50
Ch0 Bandwidth 20


Thank you

On May 5, 2019 11:05 PM, "Marcus D Leech"
mailto:patchvonbr...@gmail.com>> wrote:

What output level for the generator? What gain setting on
the b205?


Sent from my iPhone

On May 5, 2019, at 11:58 AM, franz kurniawan
mailto:digitalturtle2...@gmail.com>> wrote:


So, i try to make AM receiver..
And the resulted demodulated audio was distorted from
its original signal..
So, at this experiment i used signal generator to make
AM with sine wave modulated signal..
I expect to get pure sine wave signal after AM demod
process..
However, the sine wave is distorted as attached picture

I compared with another brand SDR and can get my
expected signal..
So i guess there is some problem with the b210mini

Thank you



On May 5, 2019 10:28 PM, "Marcus D. Leech via
USRP-users" mailto:usrp-users@lists.ettus.com>> wrote:

On 05/05/2019 10:53 AM, franz kurniawan via
USRP-users wrote:

Dear USRP users,

I used b210mini and encounter I/Q imbalance as
below picture..
As a result, the analog signal demodulation was
distorted and result a crappy sound..
I
Is there any workaround regarding this issue?

Thank you


Not sure what you mean.  The I/Q seem to be about
90deg out of phase wrt one another, which is exactly
what you'd expect.

Could you describe what it is you're trying to do?
Something with an audio demodulator?



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Re: [USRP-users] B210 mini I/Q imbalance?

[franz kurniawan via USRP-users]

Hi brian,

You are absolutely correct !
after i shifted 2Khz , i can get the expected signal..

In term of usrp sink (AM Tx), do you think that the same condition might
occurred?

Thank you



On May 6, 2019 12:12 AM, "Brian Padalino"  wrote:

Since it's AM, try shifting your center frequency by a little bit.

Extract the envelope the same way, though.

My thought is the DC cancellation circuitry in the 9361 is killing your AM
waveform, so use a low-IF approach instead.

Brian

On Sun, May 5, 2019 at 1:05 PM franz kurniawan via USRP-users <
usrp-users@lists.ettus.com> wrote:

> I reduced to -40db, -50db and have the same result..
>
> I attached the pictures of b200mini vs other SDR with the same signal
> generator..
>
> I expect the same result with the 'other SDR' result..
> The IQ data of b200 is seems to be incorrect (imbalance? )
>
> I have tried the uhd of these version :
> v3.14.0.0-rc3 ,
> release_003_007_001,
> release_003_010_001_000
>
> But all have the same result..
>
> I tried to disable the set_auto_iq_balance to both false and true, but
> have no effect..
>
> Thank you
>
> On May 5, 2019 11:27 PM, "Marcus D Leech"  wrote:
>
> -20dBM is loud. Try backing the generator down to -40dBm
>
>
> Sent from my iPhone
>
> On May 5, 2019, at 12:14 PM, franz kurniawan 
> wrote:
>
> I set the generator at -20db and b200 gain at 50..
> I check that there is no cutoff at the usrp output and the input to AM
> demod block..
>
> Below are the setting of uhd block in gnuradio
> Samp rate 500k
> Output type float32
> Sync PC clock
> Clock rate 10 Mhz external
> Freq 121MHz
> Gain 50
> Ch0 Bandwidth 20
>
>
> Thank you
>
> On May 5, 2019 11:05 PM, "Marcus D Leech"  wrote:
>
>> What output level for the generator? What gain setting on the b205?
>>
>>
>> Sent from my iPhone
>>
>> On May 5, 2019, at 11:58 AM, franz kurniawan 
>> wrote:
>>
>> So, i try to make AM receiver..
>> And the resulted demodulated audio was distorted from its original
>> signal..
>> So, at this experiment i used signal generator to make AM with sine wave
>> modulated signal..
>> I expect to get pure sine wave signal after AM demod process..
>> However, the sine wave is distorted as attached picture
>>
>> I compared with another brand SDR and can get my expected signal..
>> So i guess there is some problem with the b210mini
>>
>> Thank you
>>
>>
>>
>> On May 5, 2019 10:28 PM, "Marcus D. Leech via USRP-users" <
>> usrp-users@lists.ettus.com> wrote:
>>
>> On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:
>>
>>> Dear USRP users,
>>>
>>> I used b210mini and encounter I/Q imbalance as below picture..
>>> As a result, the analog signal demodulation was distorted and result a
>>> crappy sound..
>>> I
>>> Is there any workaround regarding this issue?
>>>
>>> Thank you
>>>
>>>
>>> Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt
>> one another, which is exactly what you'd expect.
>>
>> Could you describe what it is you're trying to do?  Something with an
>> audio demodulator?
>>
>>
>>
>> ___
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>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>> 
>>
>>
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Re: [USRP-users] B210 mini I/Q imbalance?

[Brian Padalino via USRP-users]

Since it's AM, try shifting your center frequency by a little bit.

Extract the envelope the same way, though.

My thought is the DC cancellation circuitry in the 9361 is killing your AM
waveform, so use a low-IF approach instead.

Brian

On Sun, May 5, 2019 at 1:05 PM franz kurniawan via USRP-users <
usrp-users@lists.ettus.com> wrote:

> I reduced to -40db, -50db and have the same result..
>
> I attached the pictures of b200mini vs other SDR with the same signal
> generator..
>
> I expect the same result with the 'other SDR' result..
> The IQ data of b200 is seems to be incorrect (imbalance? )
>
> I have tried the uhd of these version :
> v3.14.0.0-rc3 ,
> release_003_007_001,
> release_003_010_001_000
>
> But all have the same result..
>
> I tried to disable the set_auto_iq_balance to both false and true, but
> have no effect..
>
> Thank you
>
> On May 5, 2019 11:27 PM, "Marcus D Leech"  wrote:
>
> -20dBM is loud. Try backing the generator down to -40dBm
>
>
> Sent from my iPhone
>
> On May 5, 2019, at 12:14 PM, franz kurniawan 
> wrote:
>
> I set the generator at -20db and b200 gain at 50..
> I check that there is no cutoff at the usrp output and the input to AM
> demod block..
>
> Below are the setting of uhd block in gnuradio
> Samp rate 500k
> Output type float32
> Sync PC clock
> Clock rate 10 Mhz external
> Freq 121MHz
> Gain 50
> Ch0 Bandwidth 20
>
>
> Thank you
>
> On May 5, 2019 11:05 PM, "Marcus D Leech"  wrote:
>
>> What output level for the generator? What gain setting on the b205?
>>
>>
>> Sent from my iPhone
>>
>> On May 5, 2019, at 11:58 AM, franz kurniawan 
>> wrote:
>>
>> So, i try to make AM receiver..
>> And the resulted demodulated audio was distorted from its original
>> signal..
>> So, at this experiment i used signal generator to make AM with sine wave
>> modulated signal..
>> I expect to get pure sine wave signal after AM demod process..
>> However, the sine wave is distorted as attached picture
>>
>> I compared with another brand SDR and can get my expected signal..
>> So i guess there is some problem with the b210mini
>>
>> Thank you
>>
>>
>>
>> On May 5, 2019 10:28 PM, "Marcus D. Leech via USRP-users" <
>> usrp-users@lists.ettus.com> wrote:
>>
>> On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:
>>
>>> Dear USRP users,
>>>
>>> I used b210mini and encounter I/Q imbalance as below picture..
>>> As a result, the analog signal demodulation was distorted and result a
>>> crappy sound..
>>> I
>>> Is there any workaround regarding this issue?
>>>
>>> Thank you
>>>
>>>
>>> Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt
>> one another, which is exactly what you'd expect.
>>
>> Could you describe what it is you're trying to do?  Something with an
>> audio demodulator?
>>
>>
>>
>> ___
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>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>> 
>>
>>
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Re: [USRP-users] B210 mini I/Q imbalance?

[Marcus D Leech via USRP-users]

-20dBM is loud. Try backing the generator down to -40dBm


Sent from my iPhone

> On May 5, 2019, at 12:14 PM, franz kurniawan  
> wrote:
> 
> I set the generator at -20db and b200 gain at 50..
> I check that there is no cutoff at the usrp output and the input to AM demod 
> block..
> 
> Below are the setting of uhd block in gnuradio
> Samp rate 500k
> Output type float32
> Sync PC clock
> Clock rate 10 Mhz external
> Freq 121MHz
> Gain 50
> Ch0 Bandwidth 20
> 
> 
> Thank you
> 
>> On May 5, 2019 11:05 PM, "Marcus D Leech"  wrote:
>> What output level for the generator? What gain setting on the b205?
>> 
>> 
>> Sent from my iPhone
>> 
>>> On May 5, 2019, at 11:58 AM, franz kurniawan  
>>> wrote:
>>> 
>>> So, i try to make AM receiver..
>>> And the resulted demodulated audio was distorted from its original signal..
>>> So, at this experiment i used signal generator to make AM with sine wave 
>>> modulated signal..
>>> I expect to get pure sine wave signal after AM demod process..
>>> However, the sine wave is distorted as attached picture
>>> 
>>> I compared with another brand SDR and can get my expected signal..
>>> So i guess there is some problem with the b210mini
>>> 
>>> Thank you
>>> 
>>> 
>>> 
>>> On May 5, 2019 10:28 PM, "Marcus D. Leech via USRP-users" 
>>>  wrote:
 On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:
 Dear USRP users,
 
 I used b210mini and encounter I/Q imbalance as below picture..
 As a result, the analog signal demodulation was distorted and result a 
 crappy sound..
 I
 Is there any workaround regarding this issue?
 
 Thank you
 
 
>>> Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt 
>>> one another, which is exactly what you'd expect.
>>> 
>>> Could you describe what it is you're trying to do?  Something with an audio 
>>> demodulator?
>>> 
>>> 
>>> 
>>> ___
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>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>> 
>>> 
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Re: [USRP-users] B210 mini I/Q imbalance?

[franz kurniawan via USRP-users]

I set the generator at -20db and b200 gain at 50..
I check that there is no cutoff at the usrp output and the input to AM
demod block..

Below are the setting of uhd block in gnuradio
Samp rate 500k
Output type float32
Sync PC clock
Clock rate 10 Mhz external
Freq 121MHz
Gain 50
Ch0 Bandwidth 20


Thank you

On May 5, 2019 11:05 PM, "Marcus D Leech"  wrote:

> What output level for the generator? What gain setting on the b205?
>
>
> Sent from my iPhone
>
> On May 5, 2019, at 11:58 AM, franz kurniawan 
> wrote:
>
> So, i try to make AM receiver..
> And the resulted demodulated audio was distorted from its original signal..
> So, at this experiment i used signal generator to make AM with sine wave
> modulated signal..
> I expect to get pure sine wave signal after AM demod process..
> However, the sine wave is distorted as attached picture
>
> I compared with another brand SDR and can get my expected signal..
> So i guess there is some problem with the b210mini
>
> Thank you
>
>
>
> On May 5, 2019 10:28 PM, "Marcus D. Leech via USRP-users" <
> usrp-users@lists.ettus.com> wrote:
>
> On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:
>
>> Dear USRP users,
>>
>> I used b210mini and encounter I/Q imbalance as below picture..
>> As a result, the analog signal demodulation was distorted and result a
>> crappy sound..
>> I
>> Is there any workaround regarding this issue?
>>
>> Thank you
>>
>>
>> Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt
> one another, which is exactly what you'd expect.
>
> Could you describe what it is you're trying to do?  Something with an
> audio demodulator?
>
>
>
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Re: [USRP-users] B210 mini I/Q imbalance?

[Marcus D Leech via USRP-users]

What output level for the generator? What gain setting on the b205?


Sent from my iPhone

> On May 5, 2019, at 11:58 AM, franz kurniawan  
> wrote:
> 
> So, i try to make AM receiver..
> And the resulted demodulated audio was distorted from its original signal..
> So, at this experiment i used signal generator to make AM with sine wave 
> modulated signal..
> I expect to get pure sine wave signal after AM demod process..
> However, the sine wave is distorted as attached picture
> 
> I compared with another brand SDR and can get my expected signal..
> So i guess there is some problem with the b210mini
> 
> Thank you
> 
> 
> 
> On May 5, 2019 10:28 PM, "Marcus D. Leech via USRP-users" 
>  wrote:
>> On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:
>> Dear USRP users,
>> 
>> I used b210mini and encounter I/Q imbalance as below picture..
>> As a result, the analog signal demodulation was distorted and result a 
>> crappy sound..
>> I
>> Is there any workaround regarding this issue?
>> 
>> Thank you
>> 
>> 
> Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt one 
> another, which is exactly what you'd expect.
> 
> Could you describe what it is you're trying to do?  Something with an audio 
> demodulator?
> 
> 
> 
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Re: [USRP-users] B210 mini I/Q imbalance?

[Marcus D. Leech via USRP-users]

On 05/05/2019 10:53 AM, franz kurniawan via USRP-users wrote:

Dear USRP users,

I used b210mini and encounter I/Q imbalance as below picture..
As a result, the analog signal demodulation was distorted and result a 
crappy sound..

I
Is there any workaround regarding this issue?

Thank you


Not sure what you mean.  The I/Q seem to be about 90deg out of phase wrt 
one another, which is exactly what you'd expect.


Could you describe what it is you're trying to do?  Something with an 
audio demodulator?




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[USRP-users] B210 mini I/Q imbalance?

[franz kurniawan via USRP-users]

Dear USRP users,

I used b210mini and encounter I/Q imbalance as below picture..
As a result, the analog signal demodulation was distorted and result a
crappy sound..
I
Is there any workaround regarding this issue?

Thank you
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Re: [USRP-users] Vivado versions for RFNoC

[Brian Padalino via USRP-users]

2017.4 is the latest version that is supported I believe.

Brian

On Sun, May 5, 2019 at 6:36 AM Sam mite via USRP-users <
usrp-users@lists.ettus.com> wrote:

> I want to know what are the current supported vivado versions for X300 and
> X310 and also for E310 and E320 for generating RFNoC images?
> --
>
> Best Regards,
>
> Sam
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[USRP-users] Vivado versions for RFNoC

[Sam mite via USRP-users]

I want to know what are the current supported vivado versions for X300 and
X310 and also for E310 and E320 for generating RFNoC images?
-- 

Best Regards,

Sam
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