Архив за 01.10.2019

software to scan and log strongest signals

Looking for some SDR software to scan a range (460-465 mhz for example) and keep track of anything above a certain signal level then log it (no need to record it, just looking for the frequencies) so I can tune around later and listen to what is around me.

Anything out there that does it well?

submitted by /u/SeanVo
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KerberosSDR • Re: Testing the 4 rtl- sdrs

I’m fairly confident the sdr is getting the power it needs, the power light is on. I did swap out my usb cable and that fixed my issue of the pi seeing the sdr. I must have been using a power only usb cable. Anyhow, it looks as I’m getting a good test from each individual sdr but I’m still not getting an update rate. Any ideas?
03AE688B-2731-46CD-9463-BFDF0071BAC3.jpeg

Statistics: Posted by 253flo — Tue Oct 01, 2019 10:23 pm


Comment on Watching Lightning Strikes on the Spectrum with an RTL-SDR by Roy

Unfrotunately, the internet tells me that rain fade starts at around 11 GHz, which is not measureable with the V3 dongle. But what you could do for a rain detector is mount a long pole on your hat that separates a very low power 11 GHz transmitter and receiver. Then you could program an arduino to monitor the signal strength and turn on an LED when the strength dips due to rain attenuation. When the light turns on, simply pack your golf clubs and head for the 19th hole. Bam! Problem solved. I’ll send you an invoice for my services.

KerberosSDR • Re: RPI v1.4 image has currupted FS

I am running that image with much success. What errors are you seeing?

Statistics: Posted by myke — Tue Oct 01, 2019 9:26 pm


Comment on RTL-SDR Tutorial: Decoding Inmarsat STD-C EGC Messages by Anonymous

Wow.. I would be .. I am not really a programmer but I can try help as I have a 24/7 feed off a 1M dish

Comment on Fingerprinting Electronic Devices via their RF Emissions with an RTL-SDR and ImageMagick by Xanon

I suppose that the device has to be in a static place. I’m testing the script while generating intentioned EMIs and still working fine… probably because the “distortion” argument on imagemagick doesn’t mean “equal images”.

Comment on HackRF Receiving HRPT Weather Satellite Images by Mr. G.

Regarding:
“…above 1.5gzhz…”

Really? This is a new one…
Someone needs to become educated on how to properly abbreviate gigahertz! Incidentally folks, it’s a capital “H” for a reason.

Comment on RTL-SDR Tutorial: Decoding Inmarsat STD-C EGC Messages by microp11

It might take some time, but some weeks ago I have made the changes and compiled the scytalec decoder for RPi. The decoder takes IQ as input and spits out Inmarsat frames as needed by the Scytalec QuickUI. I could package that if anyone interested to test. On the 3b it barely scratches the surface in terms of processor so the idea is that a handful of channels (based on the sdr BW) can be decoded at the same time. The idea is to use the ftp sdr to tap into the BW, and then process individually the 4k channels with a small app that only does this.Then feed the IQ into the decoder which already outputs the inmarsat frames as mentioned above.The problem is the time, not the actual coding. If anyone interested into writing the code, I would be happy to help with all the parts need be put together.

Comment on Building An Open Source SDR Based Hydrogen Line Radio Telescope by snn47

Sorry the Parrot Horn I quoted above was designed by Wilcox and can be seen at page 16 fig. 28 the elevation pattern in and fig. 29 in the CEPT WP provided to WG SE7 under Reference SE7(19)182R1 with the title “Elevation contour pattern for aeronautical systems in the band 960 to 1215 MHz – aircraft antenna – Amendment 2”.

Comment on RTL-SDR Tutorial: Decoding Inmarsat STD-C EGC Messages by Robby

Funny that .. I haven’t found anything that’s stable besides using a Raspberry pi and a win computer. I wish I could find a STD-C decoder in linux.

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