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Re: [Discuss-gnuradio] 'Counts' in WX Scope Plot

From: Sylvain Munaut
Subject: Re: [Discuss-gnuradio] 'Counts' in WX Scope Plot
Date: Wed, 9 Jul 2014 11:19:16 +0200

On Wed, Jul 9, 2014 at 11:09 AM, jsam45 <address@hidden> wrote:
> The vertical axis in Scope Plot is labelled as Counts. What does it mean? How
> is it related to the physical parameters of the signal like amplitude/power?

It's dependent on your hardware.

Basically 'count' is just the raw value and what that value means is
whatever the source block returned. It can be normalized between -1.0
and 1.0 or represent the raw adc value, and then what voltage the
represents depends on the ADC reference used in your hw. What power it
represent at the input depends on the total gain in the rx chain from
input to ADC ...

All of that is out-of-scope for GR, you have to calibrate it out if
you want absolute/known units.



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