SDRplay Community Forum

Hello Jukka, The launch of the RSPduo was timed to coincide with a major Ham radio event at Dayton, Ohio. We made it clear at the launch what software was available and what our development plans were. People therefore had a choice whether they buy the product or wait. Unfortunately, no mater what s...

Hello Patrick, The noise floor on the spectrum display is the noise power per bin of the FFT, or put another way, it is the total noise power in the resolution bandwidth of the FFT. I cannot see the RBW value in your picture, but it will be shown in the lower right hand corner of your SP1 display. T...

Hello glovisol, The only change between 1.23 and 1.23.1 is a change to the API to correct a bug that was affecting the RSPduo tuner 2 at a 10 MHz sampling rate. Nothing else has changed. Can you confirm what hardware you are using and post screen shots that show the effects you are seeing? Ideally o...

Hello Francois, All SDR programs receive an I/Q stream from the ADCs and so all magnitude information is referred initially to the ADC input. To convert this to an antenna referred power level, the software uses a combination of the RSP gain setting values and calibration tables to calculate what th...

glovisol, I would very much like to commend you on an exceptionally high quality and informative thread. This level of technical information is both rare and invaluable to the whole community. Similarly the contribution from both yourself and Phil (vk7jj) regarding noise measurements and antenna mod...

Hello Folks, Decimation will have no discernible affect on sensitivity or noise figure. Decimation increases the ADC resolution and decreases quantisation noise. This will only be noticeable at very low gain settings where the ADC quantisation noise starts to be come significant in the overall syste...

Hello John,
You are tuned to 107.2 kHz, not 107.2 MHz.

Sincerely

Tech_Support

maccountrypilot wrote:well uno will not load when the spectrum analyzer tries to run .... it says there is no rsp present

You can only run one at a time as each application will reserve the RSP.

Sincerely

Tech_Support

Hello Tim,
This will just be the screws in the green connector. Either tighten them up or un-plug the connector and the rattle will go away.

Sincerely

Tech_Support

I suspect what you are seeing here is ADC overload. Moving the RF gain from state 0 to state 8 reduces the RF gain. In my tests, I can see a warning for an overloaded ADC.

Steve can perhaps comment better on this.

Sincerely

Tech_Support