Search found 6 matches

by MMcC
Fri Jun 11, 2021 5:08 am
Forum: Signal Identification Help
Topic: Hydrogen Line Band Interference
Replies: 4
Views: 5663

Re: Hydrogen Line Band Interference

This is from a drift scan. I don't entirely rule out interference, but it is hard to see where it would be coming from.

Image
by MMcC
Mon Jun 07, 2021 6:40 am
Forum: Signal Identification Help
Topic: Hydrogen Line Band Interference
Replies: 4
Views: 5663

Re: Hydrogen Line Band Interference

I ran IF average and get a similar peak, although it is smaller due to the lack of tuning.
by MMcC
Mon Jun 07, 2021 4:01 am
Forum: RTL-SDR Discussion
Topic: Directed RF at our Office Causes Headaches
Replies: 33
Views: 15901

Re: Directed RF at our Office Causes Headaches

It is hard to say. I don't think anyone has published a clear list of frequencies, noted effects such as headaches and power densities.
by MMcC
Fri Jun 04, 2021 6:52 am
Forum: Signal Identification Help
Topic: Can not find modulation type for signal
Replies: 1
Views: 3067

Re: Can not find modulation type for signal

Looks similar to a wireless doorbell. Try FSK.
by MMcC
Fri Jun 04, 2021 5:56 am
Forum: RTL-SDR Discussion
Topic: Directed RF at our Office Causes Headaches
Replies: 33
Views: 15901

Re: Directed RF at our Office Causes Headaches

RadMan 2XT is an RF Exposimeter operating in the ranges 900KHz-60GHz (E-Field) and 27MHz - 1GHz (H-Field). While it is good for detecting exposure across the bands, it won't isolate the frequencies or provide any directional information.
by MMcC
Fri Jun 04, 2021 5:34 am
Forum: Signal Identification Help
Topic: Hydrogen Line Band Interference
Replies: 4
Views: 5663

Hydrogen Line Band Interference

I have an RTLSDR connected to a Yagi antenna. It seems to work well, enough to pick up what appears the be the Hydrogen Line. The 1.420GHz range is meant to be protected from interference, but I am seeing weak signals right across the band. These disappear when the antenna is removed and some of the...