Re: [Discuss-gnuradio] USRP Rx signal levels

[Krzysztof Kamieniecki]

Eric Blossom wrote:
> On Sat, Jun 18, 2005 at 01:26:27AM -0400, Krzysztof Kamieniecki wrote:
>
> > I confused as to how the USRP FPGA scales the ADC signal. It appears 
> > that on the setup we are using, which has some customized DC Rx 
> > daughter boards, when we put in a 2V p-p square wave with a DDC center 
> > frequency of zero and a decimation rate of 64 we are getting data that 
> > is p-p ~16000 counts, is this normal? I'll be checking how the normal 
> > Rx boards behave on Sunday.
>
>
> Krys,
>
> Seems low, but it may be normal.  Matt could confirm, but he's on his
> way to Green Bank.
>
> Eric

I measured the signal with the normal RX daughter boards and I got the same results. A 2V p-p sine 
signal (measured simultaniously on a real oscilloscope) showed a ~16000 count p-p signal in the 
gnuradio oscilloscope display.


--
Krzysztof Kamieniecki
callsign:KB1KLB
mailto:address@hidden