Sdr Noise Floor Reduction

Sorry i i just read the link to mariners blog so maybe external monitor is not used i still think it is the computer generating the noise wrap as many turns that will fit of the usb cable that connects to the dongle through a.

Sdr noise floor reduction.

Found some dirty wall warts and got rid of them. First i measured noise using cw mode with a 100 hz bandwidth. In this blog i will describe how i measured the nf the. The sdr that i use next to my transceiver is the airspy spyverter combination.

With a portable radio and a loop antenna i drove a lot of back roads mapping the noisy power poles. I ran two receivers rsp2 and perseus side by side sharing the same antenna on the same frequency. I ve recently received an rtl sdr dongle and i m picking up a lot of noise that is probably coming from my pc especially a lot of spikes on the 2m band. I ve already started using a usb extension cable instead of plugging the dongle into the pc.

What else can i do to reduce the noise floor and get rid of the rfi on 2 meters. Written by admin 10 comments posted in amateur radio hf rtl sdr tagged with hf noise floor rtl sdr rtl2832 rtl2832u january 17 2017 lowering the noise floor on hf with high quality coax bonito is a company that sells various products such as their own small active antennas. My noise floor on 160m in the daytime was s9 30. It should like any other receiver have a certain noise floor nf but this figure was hard to find on the internet so that i decided to measure it myself.

My objective was to calculate sdr spectrum noise floor from first principles using the above formula. Working with two power coops i got. Sdr spectrum noise floor running the numbers. I turned off all the power to my house to assure myself that the noise was not from a wall wart or anything else.