Re: HiQSDR Noise floor/sensitivity
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Hello Jim,
Thanks for your feedback, clearly the noise floor I observe is 10 dB too high. I am off for the weekend, but will run tests on Monday using an analog power supply, in stead of the switch mode I use now. Fingers crossed that's the culprit!
73s,
Peter
Hello Peter,
My HiQSDR shows a noise floor in 3 KHz of -111 dB at 10 MHz. So it looks like you have extra noise.
But see??for a discussion of ADC noise figures. They are high, almost 30 dB. I have a preamp that I switch in for bands 20 meters and up. I have often wondered if direct sampling SDRs would be a good match for UHF transverters.
BTW, I use a switching regulator to go from 13 volts to 6, and then use linear regulators to power my HiQSDR. I also suspect the power supply.
Jim
N2ADR
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