|Subject:||Re: [Discuss-gnuradio] 'Counts' in WX Scope Plot|
|Date:||Thu, 10 Jul 2014 09:26:01 -0400|
On 07/10/2014 05:33 AM, Vanush Vaswani wrote:There's a difference: 'Counts' implies the digital nature of the signal,
> I think 'Magnitude' is better than counts, which is just confusing.
and 'Magnitude' cannot be negative. 'Amplitude' would work, but again,
that doesn't imply amplitude-discrete steps.
> On Wed, Jul 9, 2014 at 7:19 PM, Sylvain Munaut <address@hidden> wrote:
>> 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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