SNR: Measurement

[johnhlong]

I can't seem to find anything detailing how the SNR figure is calculated in the SDRuno manual.

When running SDRuno v1.22 I see a SNR: value in the SDRuno main sp window.

Is that a measurement of the complete spectrum being displayed or of the signal inside the filtered area I have selected?

I would like to just get a SNR figure for the selected signal I am receiving. (I.E a ham band SSB signal).

Thanks for any help,

John
KW7A

[Tech_Support]

Hello John,
The SNR measurement is only for the selected signal as defined by the filter bandwidth defined within the Rx Control panel. The signal power is taken from the power meter measurement and the noise is estimated via an analysis of the entire wider band noise floor within the SP1 window to remove the effect of the presence of other signals. As such, the SNR measurement is not a precise measurement, but it is reasonably accurate.

Sincerely

SDRplay Tech_Support

[johnhlong]

Thanks for the quick reply.

Your answer help a great bunch.

John
KW7A