[Discuss-gnuradio] convert A/D values to volts

[Eric Hill Matlis]

Hi all-

I am demodulating an AM modulated waveform, and would like to display the 
time series of the sideband in a window.  I have code that uses the scope 
sink to do this, but the magnitude is in units which I take to be 
correlated to A/D raw values (ie, values near 2000).  How do I convert 
this to an equivalent voltage?  I am using the LFRX daughterboard (DC-50 
MHz) to acquire the signal.  I know that Charles Swiger has some c-codes 
that do this, but I'm not sure which format I'm converting from (4-byte 
floating point?) or how to implement that in Python.  My code is at:

www.nd.edu/~ematlis/z.gnuradio/am_rcv_plasma.py

thanks,

eric

************************************
Eric H. Matlis, Ph.D.
Aerospace & Mechanical Engineering Dept.
120 Hessert Center for Aerospace Research
University of Notre Dame
Notre Dame, IN 46556-5684
Phone: (574) 631-6054
Fax:   (574) 631-8355