[Elecraft] K3S DSP Filter Plots

[Alan]

 From Wikipedia:  https://en.wikipedia.org/wiki/S_meter

    "IARU Region 1 Technical Recommendation R.1 defines S9 for the
    HF bands to be a receiver input power of -73 dBm. This is a level
    of 50 microvolts at the receiver's antenna input assuming the
    input impedance of the receiver is 50 ohms.

    For VHF bands the recommendation defines S9 to be a receiver
    input power of -93 dBm. This is the equivalent of 5 microvolts
    in 50 ohms."

Alan N1AL


On 11/18/2015 03:46 PM, Bob McGraw - K4TAX wrote:
> The original S meter development for HF radios was done by Art Collins.
> At that time the number used was 100 uV for S-9 to coincide with the RST
> system.  Later the value was revised to 50 uV for S-9.  Values above S -
> 9 are stated usually in dB although I've seen some in microvolts.  If
> one ventures into the VHF spectrum then the value changes.  {I forget to
> what value}
>