Re: [USRP-users] Testing with single B200

[Kevin McQuiggin via USRP-users]

Hi Rensi:

Fantastic that you have your B200 working!

Packet reception is more complex.  The best place to start is at gnuradio.org 
 with their quite detailed tutorials.  There is an 
example showing packet transmission and reception, as I recall.  There are also 
pre-written packet processing blocks, but I haven’t used them.

I would also suggest subscribing to the discuss-gnuradio mailing list.  
Directions are on the gnuradio.org  site.

Expect to take a few weeks at least for reading/learning, especially if you 
have no previous SDR experience.

If you don’t have experience in this area, then there is an excellent book 
called “The Scientist and Engineer's Guide to
Digital Signal Processing” by Steven Smith.  It is free and available online at:

http://dspguide.com/ 

I liked it so much that I bought a hardcopy, and several years in I still refer 
to the book for background information.

Good luck as you start this fun journey!  I started from "ground zero" myself a 
few years ago.

Kevin

> On Sep 21, 2017, at 1:43 AM, Rensi Mathew  wrote:
> 
> Hi Kevin
> 
> I am able to receive FM signals.  It was not using the und_fft.grc but an 
> WBFM receive grc.
> 
> Now I need to receive packets. I am thinking how to go about it?
> 
> Will there be any damage to the USRP if I try to receive using any other 
> antenna, I mean FM signal using 850-6500 MHz antenna?
> 
> Thanking you
> 
> Rensi
> 
> 
> 
> 
> On Tuesday, September 19, 2017 7:27 PM, Kevin McQuiggin  
> wrote:
> 
> 
> Hi Rensi:
> 
> Well it looks like your device is being found.  You should be able to run 
> uhd_fft as such:
> 
>   uhd_fft -f 10350
> 
> This will centre the display on 103.5 MHz.  If you have FM band broadcasters 
> in your region then you should see spikes on the fft display.
> 
> Give this a try and let me and the list know what you see.
> 
> Kevin
> 
> 
>> On Sep 19, 2017, at 2:48 AM, Rensi Mathew > > wrote:
>> 
>> 
>> Hi Kevin
>> 
>> When I try uhd_probe_devices, it is showing serial number and device B200.
>> 
>> My machine is Intel i5-2400CPU @ 3.10 GHz
>> The OS is Ubuntu 16.04
>> 
>> I have installed GNU radio Companion on this.
>> 
>> I will loook into the utility and reply.
>> 
>> Thanking you
>> 
>> Rensi
>> 
>> 
>> On Monday, September 18, 2017 9:09 PM, Kevin McQuiggin > > wrote:
>> 
>> 
>> Hi Renaissance:
>> 
>> Your B200 isn't being found by your computer.  Try the usrp_probe utility, I 
>> forget the exact name but it is in the same directory/folder as uhd_fft.
>> 
>> The USB cable can sometimes be problematic as it has to be high quality, 
>> some cheap cables don't work as they are noisy or have poor connections.
>> 
>> What type of computer and OS are you using?  On Windows there are sometimes 
>> problems with the USB drivers.
>> 
>> Don't worry about the eeprom at all, get the base unit working first.
>> 
>> Let us know how you make out with the probe.
>> 
>> Kevin
>> Sent from my iPhone
>> 
>> On Sep 18, 2017, at 03:54, Rensi Mathew > > wrote:
>> 
>>> Hi Kevin
>>> 
>>> when I try to run uhd_fft, I get the error
>>> 
>>> RuntimeError: LookupError: KeyError: No devices found for ->
>>> Empty Device Address
>>> 
>>> How can I assign a device address?
>>> 
>>> I tried  ./usrp_burn_mb_eeprom --args=addr --values="192.168.10.2" but it 
>>> is not working.
>>> 
>>> Pl do help.
>>> Thanking you
>>> 
>>> Rensi
>>> 
>>> 
>>> On Friday, September 15, 2017 9:12 PM, Kevin McQuiggin >> > wrote:
>>> 
>>> 
>>> Hi Rensi:
>>> 
>>> I’d suggest using the UHD utility programs that come with the B200.  There 
>>> is a spectrum analyzer application, called uhd_fft, and a simple radio 
>>> receiver that can, for example, be used to test your unit with local 
>>> broadcast stations in the FM band.  You’ll need a small antenna for one of 
>>> the SMA connectors.  If you don’t have a proper antenna or connector, you 
>>> could simply stick a short piece of wire into the SMA connector for testing.
>>> 
>>> For transmitting, an antenna is more critical as you shouldn’t really 
>>> transmit into an unconnected or mismatched antenna.  I’d suggest looking 
>>> again at the utilities provided with either the B200 or gnuradio.  You can 
>>> build a simple transmitter and use an “FM band” broadcast radio to receive 
>>> the transmissions from your USRP.
>>> 
>>> I would also suggest going to the gnuradio.org  web 
>>> site and working through the tutorial series.  This will help you get 
>>> started!
>>> 
>>> Kevin
>>> 
>>> 
 On Sep 15, 2017, at 3:27 AM, Rensi Mathew via USRP-users 
 > wrote:
 
 Hi all
 
 I have a single B200 with me 

Re: [USRP-users] Testing with single B200

[Kevin McQuiggin via USRP-users]

Hi Rensi:

Well it looks like your device is being found.  You should be able to run 
uhd_fft as such:

uhd_fft -f 10350

This will centre the display on 103.5 MHz.  If you have FM band broadcasters in 
your region then you should see spikes on the fft display.

Give this a try and let me and the list know what you see.

Kevin


> On Sep 19, 2017, at 2:48 AM, Rensi Mathew  wrote:
> 
> 
> Hi Kevin
> 
> When I try uhd_probe_devices, it is showing serial number and device B200.
> 
> My machine is Intel i5-2400CPU @ 3.10 GHz
> The OS is Ubuntu 16.04
> 
> I have installed GNU radio Companion on this.
> 
> I will loook into the utility and reply.
> 
> Thanking you
> 
> Rensi
> 
> 
> On Monday, September 18, 2017 9:09 PM, Kevin McQuiggin  
> wrote:
> 
> 
> Hi Renaissance:
> 
> Your B200 isn't being found by your computer.  Try the usrp_probe utility, I 
> forget the exact name but it is in the same directory/folder as uhd_fft.
> 
> The USB cable can sometimes be problematic as it has to be high quality, some 
> cheap cables don't work as they are noisy or have poor connections.
> 
> What type of computer and OS are you using?  On Windows there are sometimes 
> problems with the USB drivers.
> 
> Don't worry about the eeprom at all, get the base unit working first.
> 
> Let us know how you make out with the probe.
> 
> Kevin
> Sent from my iPhone
> 
> On Sep 18, 2017, at 03:54, Rensi Mathew  > wrote:
> 
>> Hi Kevin
>> 
>> when I try to run uhd_fft, I get the error
>> 
>> RuntimeError: LookupError: KeyError: No devices found for ->
>> Empty Device Address
>> 
>> How can I assign a device address?
>> 
>> I tried  ./usrp_burn_mb_eeprom --args=addr --values="192.168.10.2" but it is 
>> not working.
>> 
>> Pl do help.
>> Thanking you
>> 
>> Rensi
>> 
>> 
>> On Friday, September 15, 2017 9:12 PM, Kevin McQuiggin > > wrote:
>> 
>> 
>> Hi Rensi:
>> 
>> I’d suggest using the UHD utility programs that come with the B200.  There 
>> is a spectrum analyzer application, called uhd_fft, and a simple radio 
>> receiver that can, for example, be used to test your unit with local 
>> broadcast stations in the FM band.  You’ll need a small antenna for one of 
>> the SMA connectors.  If you don’t have a proper antenna or connector, you 
>> could simply stick a short piece of wire into the SMA connector for testing.
>> 
>> For transmitting, an antenna is more critical as you shouldn’t really 
>> transmit into an unconnected or mismatched antenna.  I’d suggest looking 
>> again at the utilities provided with either the B200 or gnuradio.  You can 
>> build a simple transmitter and use an “FM band” broadcast radio to receive 
>> the transmissions from your USRP.
>> 
>> I would also suggest going to the gnuradio.org  web 
>> site and working through the tutorial series.  This will help you get 
>> started!
>> 
>> Kevin
>> 
>> 
>>> On Sep 15, 2017, at 3:27 AM, Rensi Mathew via USRP-users 
>>> > wrote:
>>> 
>>> Hi all
>>> 
>>> I have a single B200 with me and I want to test whether it is 
>>> receiving/transmitting the signal properly.
>>> How can i test this?
>>> 
>>> I am new to B200/SDRs and to programming too?
>>> 
>>> Thanking you
>>> Rensi
>>> ___
>>> 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] Testing with single B200

[Kevin McQuiggin via USRP-users]

Hi Renaissance:

Your B200 isn't being found by your computer.  Try the usrp_probe utility, I 
forget the exact name but it is in the same directory/folder as uhd_fft.  

The USB cable can sometimes be problematic as it has to be high quality, some 
cheap cables don't work as they are noisy or have poor connections.

What type of computer and OS are you using?  On Windows there are sometimes 
problems with the USB drivers.

Don't worry about the eeprom at all, get the base unit working first.

Let us know how you make out with the probe.

Kevin
Sent from my iPhone

> On Sep 18, 2017, at 03:54, Rensi Mathew  wrote:
> 
> Hi Kevin
> 
> when I try to run uhd_fft, I get the error
> 
> RuntimeError: LookupError: KeyError: No devices found for ->
> Empty Device Address
> 
> How can I assign a device address?
> 
> I tried  ./usrp_burn_mb_eeprom --args=addr --values="192.168.10.2" but it is 
> not working.
> 
> Pl do help.
> Thanking you
> 
> Rensi
> 
> 
> On Friday, September 15, 2017 9:12 PM, Kevin McQuiggin  
> wrote:
> 
> 
> Hi Rensi:
> 
> I’d suggest using the UHD utility programs that come with the B200.  There is 
> a spectrum analyzer application, called uhd_fft, and a simple radio receiver 
> that can, for example, be used to test your unit with local broadcast 
> stations in the FM band.  You’ll need a small antenna for one of the SMA 
> connectors.  If you don’t have a proper antenna or connector, you could 
> simply stick a short piece of wire into the SMA connector for testing.
> 
> For transmitting, an antenna is more critical as you shouldn’t really 
> transmit into an unconnected or mismatched antenna.  I’d suggest looking 
> again at the utilities provided with either the B200 or gnuradio.  You can 
> build a simple transmitter and use an “FM band” broadcast radio to receive 
> the transmissions from your USRP.
> 
> I would also suggest going to the gnuradio.org web site and working through 
> the tutorial series.  This will help you get started!
> 
> Kevin
> 
> 
>> On Sep 15, 2017, at 3:27 AM, Rensi Mathew via USRP-users 
>>  wrote:
>> 
>> Hi all
>> 
>> I have a single B200 with me and I want to test whether it is 
>> receiving/transmitting the signal properly.
>> How can i test this?
>> 
>> I am new to B200/SDRs and to programming too?
>> 
>> Thanking you
>> Rensi
>> ___
>> 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] Testing with single B200

[Marcus Müller via USRP-users]

You'll need an antenna that works for exactly the band that you want to
observe, but if you happen to have one, you can receive a known  signal.
For example, if you're in possession of a 900 MHz band antenna, you
might look for 2G signals.
If you have an antenna that works around 100 MHz, look for broadcast FM
radio.

For TX it's a bit harder, because you really shouldn't be transmitting
without checking your local laws. But the idea is the same: make a
signal that you have a device that can pick that up – for example, build
an FM transmitter, or a DRM transmitter, and tune your radio to that
frequency. Again, check local legislation.

As a tool that contains everything you need on a software side to get
started, I do recommend you start with a live bootable USB drive. Less
hassle.
There's one from the GNU Radio community[1] that comes with all the USRP
drivers (UHD) that you'll need, and example applications. If you plan to
use GNU Radio further on, read the tutorials[2].

Best regards,
Marcus
[1] https://wiki.gnuradio.org/index.php/GNU_Radio_Live_SDR_Environment
[2] https://tutorials.gnuradio.org

On 15 September 2017 3:27:39 AM GMT-07:00, Rensi Mathew via USRP-users
 wrote:

Hi all

I have a single B200 with me and I want to test whether it is
receiving/transmitting the signal properly.
How can i test this?

I am new to B200/SDRs and to programming too?

Thanking you
Rensi

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Re: [USRP-users] Testing with single B200

[Kevin McQuiggin via USRP-users]

Hi Rensi:

I’d suggest using the UHD utility programs that come with the B200.  There is a 
spectrum analyzer application, called uhd_fft, and a simple radio receiver that 
can, for example, be used to test your unit with local broadcast stations in 
the FM band.  You’ll need a small antenna for one of the SMA connectors.  If 
you don’t have a proper antenna or connector, you could simply stick a short 
piece of wire into the SMA connector for testing.

For transmitting, an antenna is more critical as you shouldn’t really transmit 
into an unconnected or mismatched antenna.  I’d suggest looking again at the 
utilities provided with either the B200 or gnuradio.  You can build a simple 
transmitter and use an “FM band” broadcast radio to receive the transmissions 
from your USRP.

I would also suggest going to the gnuradio.org  web site 
and working through the tutorial series.  This will help you get started!

Kevin


> On Sep 15, 2017, at 3:27 AM, Rensi Mathew via USRP-users 
> > wrote:
> 
> Hi all
> 
> I have a single B200 with me and I want to test whether it is 
> receiving/transmitting the signal properly.
> How can i test this?
> 
> I am new to B200/SDRs and to programming too?
> 
> Thanking you
> Rensi
> ___
> USRP-users mailing list
> USRP-users@lists.ettus.com 
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com



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