Frank Eory wrote: > In powersdr , the noise floor is -150dBm > with the radio off and -135dBm with it on. Sdradio gives me -100dB. >
Frank, the two readings are not directly comparable. The value reported by SDRadio is the ratio between the signal and the full-scale value of the sound card ADC. So if your sound card starts to saturate with an input of 1V, then -100dB means 10uV PowerSDR on the other hand gives you the dBm (not dB) value after a step of calibration. Not knowing the details of that software I cannot be more precise, maybe Bob or some other guys knowledgeable about the innards of PowerSDR can comment further. 73 Alberto I2PHD ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
