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

[Martin Braun]

On 07/10/2014 05:33 AM, Vanush Vaswani wrote:
> I think 'Magnitude' is better than counts, which is just confusing.

There's a difference: 'Counts' implies the digital nature of the signal,
and 'Magnitude' cannot be negative. 'Amplitude' would work, but again,
that doesn't imply amplitude-discrete steps.

M

> 
> 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.
>>
>> Cheers,
>>
>>    Sylvain
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>