Re: [Discuss-gnuradio] Help getting started

[Written]

Well, I've never used the TX boards before, but looking through the files I
found fm_tx.py, which makes narrow band fm.  You may have to use
usrp_nbfm_rcv.py (or whatever it's called) to pick it up, but now I'm just
guessing.

-Written


Dan Halperin wrote:
> 
> Fair enough; I figured since my officemate's pocket CD player could pick 
> up FM radio the big ole' antenna ought to be able to.
> 
> Is there a script to make a custom FM station using a BasicTX board (I 
> have another USRP if necessary) to get around that problem?
> 
> -Dan
> 
> Written wrote:
>> Well, all I can think of is using the basic rx daugtherboard along with
>> usrp_wfm_rcv.py and tuning to some local FM stations, or using the scope,
>> but it sounds like you've already done that pretty much.  Make sure the
>> gain
>> on the scope is set to about mid-point for the specific daughterboard
>> being
>> used.  I had the best luck with this.
>>
>> Depending on your scanning bandwidth, I don't know if you'll actually
>> pick
>> up any listenable stations, so I'd just use the aforementioned file for
>> FM
>> testing purposes.
>>
>> Written
>>
>>
>> Dan Halperin wrote:
>>   
>>> I've used the 2.4GHz RX/TX board, but I have since been using the Basic 
>>> RX and Basic TX boards.
>>>
>>> -Dan
>>>
>>> Written wrote:
>>>     
>>>> Hi Dan,
>>>>
>>>> What daughterboards are you using?
>>>>
>>>> Thanks,
>>>>
>>>> Written
>>>>
>>>>
>>>> Dan Halperin wrote:
>>>>   
>>>>       
>>>>> Hi all,
>>>>>
>>>>> I'm just beginning grad school and trying to get my USRP board up and 
>>>>> running so I can start playing. I've tested our equipment on two 
>>>>> different machines now; one an older box running FC4, 512MB ram, with
>>>>> an 
>>>>> Intel(R) Celeron(R) CPU 2.40GHz. I've also tried one on a newer laptop  
>>>>> (compaq v3000 series) running Gentoo Linux, with 2GB of memory. I've
>>>>> had 
>>>>> /all kinds/ of interesting phenomena:
>>>>>
>>>>> I first tried installing the way on the old wiki 
>>>>> http://www.comsec.com/wiki?UniversalSoftwareRadioPeripheral (first
>>>>> link 
>>>>> on Google for USRP), and then again using the new say (svn source 
>>>>> checkout using the instructions on the new wiki), on both machines. On 
>>>>> the older machine, I don't get any rx/tx over/underruns (or maybe just 
>>>>> one when initializing) and a throughput of 32MB/s in both directions, 
>>>>> and on the laptop I get exactly 41 under/over runs with a throughput
>>>>> of 
>>>>> ~31MB/s in the RX direction and around 24 in the TX direction. As far
>>>>> as 
>>>>> I could tell, these used the same version of the source, but then
>>>>> again 
>>>>> the SVN repository has jumped from rev. 3772 to rev. 3785 since 
>>>>> yesterday morning.
>>>>>
>>>>> Anyway, installation, make check, and the ./test_standard_?x scripts 
>>>>> work fine (the LED behaves as expected and the benchmarks seem 
>>>>> reasonable), however I get nothing when running the usrp_oscope or 
>>>>> usrp_wfm_rcv scripts as directed in the instructions. Both dial tone 
>>>>> scripts work fine, by the way. The scope and FM receive scripts run 
>>>>> fine, but I hear just hear/see static. If I set the oscope to 900MHz
>>>>> and 
>>>>> bring my cordless 900MHz phone around, there's no change in the scope. 
>>>>> If I can the entire FM spectrum in the other script, I don't get 
>>>>> anything but static anywhere. My little portable CD player can hear
>>>>> the 
>>>>> radio just fine in this lab, so I figure the foot-long copper antenna 
>>>>> that came with the USRP ought to as well. I don't know a lot about 
>>>>> communications...
>>>>>
>>>>>
>>>>> Also, the different test_digital_loopback and test_counting scripts
>>>>> seem 
>>>>> to not work very well at all. I don't know if they're expected to, but 
>>>>> about 50% of the tests that look vaguely "expected 517, got 0" fail.
>>>>>
>>>>>
>>>>> Is there any advice you can offer as to how to determine what, if 
>>>>> anything, is wrong here?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Dan
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Discuss-gnuradio mailing list
>>>>> address@hidden
>>>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>
>>>>>
>>>>>     
>>>>>         
>>>>   
>>>>       
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>>     
>>
>>   
> 
> 
> 
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