Re: [Discuss-gnuradio] Problem with USRP B200

[James Humphries]

What was the whole command that you used to identify the USRP by serial number? It should look like:

uhd_usrp_probe --args="serial=xxxxxx"

You shouldn't need it if you are using only a single USRP though.

You still get the same error in GRC when you add the type to device arguments? Can you double check the UHD source block to make sure you didn't change any other default settings that may cause issues. Sometimes as I scroll down in the blocks it will accidentally scroll through some of the drop down options. Drop a new UHD source block in and open it to see the defaults.

How did you install UHD + GNU Radio? Package manager, pre-compiled binaries, source, etc? Which OS are you using?

-Trip

On Wed, Jan 20, 2016 at 8:08 AM, Balthasar Indermuehle <address@hidden> wrote:

in my USRP source blocks I use the serial numbers of my devices (I
usually have two connected simultaneously) in the device arguments
string. Simply set the device argument string to "serial=yourserial"

Works all the time everytime, on OSX, and several different Linux distros.

On 21 January 2016 at 00:02, Henning Bredenberg

<address@hidden> wrote:
> Hello and thank you for answering, James.
>
>
>> Do you have multiple USRP's hooked up? If so, try only having one plugged
>> in for this initial test.
>
>
>>> I just have a single USRP B200 connected.
>
>
>
>> You can provide a device hint in the arguments of the UHD source block.
>> Try:
>> "type=b200"
>>
>> As another test, make sure you can use the built in utilities of UHD to
>> detect your USRP.
>>
>> uhd_usrp_probe
>>
>> uhd_find_devices
>>
>> You can also give a device hint like:
>>
>> uhd_usrp_probe --args="type=b200"
>
>
>>> the commands uhd_usrp_probe and uhd_find_devices return the needed
>>> information for the one USRP:
>>> Device Address:
>
>     type: b200
>     name:
>     serial: F5EA56
>     product: B200
>>>
>>> The USRP source block now needs the device addr. Following the
>>> documentation, "serial=F5EA56" is used as connection string. RuntimeError:
>>> LookupError: KeyError: No devices found for ----->
>
> Device Address:
>     serial: F5EA56
>>>
>>> when i use uhd_find_device again, it still comes up with the same data
>>> shown above. So it should be the right adress, right?
>
>
>

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