Re: [Elecraft] KX3 - dBV question

2014-10-23 Thread Lyle Johnson
Hallo Ralf! Yes. The measurements are taken post-filter and post-AGC. 73, Lyle KK7P Hi Lyle, So I actually measure a quantity that is proportional to the energy (signal + noise) that has been collected in the display update time, am I getting this right? Greetings Ralf, DL6OAP Am

[Elecraft] KX3 - dBV question

2014-10-20 Thread DL6OAP
Hi, I have been playing around with the dBV-Feature of my KX3 for some time. I understood how to use it and that it measures a relative input level into the AF stage of the KX3, but my question is if there is any kind of data processing involved, in other words: the display is updated roughly

Re: [Elecraft] KX3 - dBV question

2014-10-20 Thread Lyle
The DSP uses audio samples at a 12 kHz rate and performs a true RMS calculation on the samples. The result is computed over the display update time (1 second?) the buffer flushed and the process repeated.. 73, Lyle KK7P ... but am not sure, if I can compare the values directly, since I do

Re: [Elecraft] KX3 - dBV question

2014-10-20 Thread Ralf Wilhelm
Hi Lyle, So I actually measure a quantity that is proportional to the energy (signal + noise) that has been collected in the display update time, am I getting this right? Greetings Ralf, DL6OAP Am 20.10.2014 um 14:31 schrieb Lyle The DSP uses audio samples at a 12 kHz rate and performs a

Re: [Elecraft] KX3 - dBV question

2014-10-20 Thread Matt Zilmer
Hi Ralf, Lyle explained how the dBV value is derived. It's a pretty useful measurement. One way to use it is to disable AGC, then measure different signal levels. This makes dBV a linear measurement, up until the signal level causes hardware AGC to activate. Be cautious with your hearing