Re: [Discuss-gnuradio] Vector Source in GRC

[Scott Monteith]

Josh

Thanks for the suggestion.  It looks like you were right with it
clipping, and scaling it down did the trick.

Now, when looking at it on the other machine, running usrp2_fft.py -S,
the signal (for the vector [0.1], repeating) is a sine wave.  What is
making it this?

Thanks again
Scott

On Mon, Jan 11, 2010 at 12:16 PM, Josh Blum <address@hidden> wrote:
> I bet you are clipping, try scaling those numbers down to say 0.2. The range
> of the input on the usrp2 is -1 to 1
>
> -josh
>
> Scott Monteith wrote:
>>
>> I'm having trouble transmitting using the vector source in GRC.  I
>> have it sending [1+1j, 1-1j, -1+1j, -1-1j], repeated, to a USRP2 sink
>> and scope sink.  When run, the information on the scope sink (locally)
>> looks correct.  However, on a second host machine with a another USRP2
>> connected, the scope output looks like noise.  By comparison, using a
>> signal source transmits the expected values (cosine) properly.
>>
>> I did have to change the default value of 1 for the amplitude to a
>> lower value in the cosine signal source for it to transmit properly,
>> but there was no similar option for that on the vector source.  Could
>> this be the issue?  Any other ideas or suggestions?
>>
>> Thanks for the help!
>> Scott
>>
>>
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