Search found 124 matches

by JEL
Wed Mar 13, 2019 11:21 am
Forum: Signal Identification Help
Topic: Has anybody seen SRD433 be THIS busy before?
Replies: 1
Views: 617

Has anybody seen SRD433 be THIS busy before?

Usually I get only the traffic you can see between 433.750 to 434 MHz, but currently the band has gone bonkers with traffic. Have anybody seen anything as massive as this before (in this band)? I am guessing it's NOT a neighbor that has gone mad and gotten 100 weather-meters (although I'm sure stran...
by JEL
Mon Mar 11, 2019 5:23 am
Forum: Signal Identification Help
Topic: Pet-locator beacon at 125 kHz, or... ??
Replies: 0
Views: 434

Pet-locator beacon at 125 kHz, or... ??

Does this sound like a pet-locator beacon at 125 kHz? I googled 'beacon 125 khz' and got some web-pages talking about short-range (up to 100 meters / 300 feet) devices around that frequency. Some were beacons used for pets. Others were some kind of door-lock mechanism (key-less door-locks or electro...
by JEL
Sat Mar 09, 2019 6:19 am
Forum: Signal Identification Help
Topic: 868MHz thermostat
Replies: 3
Views: 12574

Re: 868MHz thermostat

Could be that it's encrypted.
by JEL
Sat Mar 09, 2019 6:08 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32389

Re: Long USB-cable vs long antenna-cable?

Thank you ab1jx :)

I'm still testing the current antenna-cable setup and so far the results are as good as I believe I can get here, so I think it's going to end up being a permanent setup.

I can't get the antenna outside, so reception options are probably very limited whatever setup I use.
by JEL
Sun Feb 10, 2019 6:33 am
Forum: Troubleshooting Help
Topic: Buzzing but no AM signal
Replies: 4
Views: 9890

Re: Buzzing but no AM signal

Looks like noise to me too.

And your noise-floor at -30 dB seems very high, so a lot of the air-signals may be under that.

You should be able to get the noise-floor down to at least -60 dB.
by JEL
Sat Feb 09, 2019 3:19 am
Forum: Signal Identification Help
Topic: 'shooting star' (mirror freq interference)
Replies: 0
Views: 9175

'shooting star' (mirror freq interference)

I was testing a new antenna I have put up and ran into the cutest little mirror frequency interference I have seen to date :) I made a 60 second long video of it and just thought I would share it here :) I am sweeping very slowly across the spectrum and it shows up a bit over half way into the video...
by JEL
Fri Feb 08, 2019 5:05 pm
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32389

Re: Long USB-cable vs long antenna-cable?

Yes, I am worried about that too (adding an extra computer, since in my experience they are some of the worst noise-offenders, along with television-sets. At least those 2 device-types are those that make most of the noise I find here in my setup) I am currently testing a 45' (15 m) antenna-cable, a...
by JEL
Tue Feb 05, 2019 9:03 pm
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32389

Re: Long USB-cable vs long antenna-cable?

I haven't seriously considered the Raspberry Pi, but maybe at a later stage I will look into that (if all else fails totally) Thanks for the suggestion :) I just got a few parts in the mail, so in the next few days I will test the long antenna-cable option. I am hoping that will go well, but we will...
by JEL
Thu Jan 31, 2019 9:23 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32389

Re: Long USB-cable vs long antenna-cable?

I tried some 'USB over Ethernet' adapters and if I need to describe them with one word: "suck" Thanks. I won't waste time or money investigating that as an option then :) Obviously, with the USB 2.0 limit being around 16 ft (cables normally available up to 15 ft) the chances of a passive cable segm...
by JEL
Tue Jan 29, 2019 4:37 pm
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32389

Re: Long USB-cable vs long antenna-cable?

crash RTL-SDR. When it does, you have to replug the device. I have had that problem myself with a cheap SDR when run on a combined 10 meter (30 feet) USB cable (one passive 5-meter and 1 active 5-meter cable) That was one of my first SDR experiments and back then I didn't know about the USB length-...