Search found 128 matches

by JEL
Fri Feb 08, 2019 5:05 pm
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 33067

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: 33067

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: 33067

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: 33067

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-...
by JEL
Tue Jan 29, 2019 6:55 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 33067

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

I want to try a discone... indoors... at the ground-floor of an apartment-complex... surrounded by noisy neighbors and all their gadgets... (including those inherent to the building and city's infrastructure) so pretty much the worst of all worlds :) I expect my max cable-range to remain below 100 f...
by JEL
Mon Jan 28, 2019 5:53 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 33067

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

I once asked this exact question for a WiFi card and I was told a longer USB cable is preferred. But in your case I suppose you could also get away by using a longer coax with an LNA instead. Thanks. I would prefer having the SDR close to the antenna, but the price for an optical USB-extender is ar...
by JEL
Mon Jan 28, 2019 4:44 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 33067

Long USB-cable vs long antenna-cable?

Which option is more advisable? Running the SDR close to the antenna with a long USB-cable going to the computer in a different room or Running the SDR close to the computer with a long antenna-cable going between the antenna in the other room and the SDR near the computer. I ask because I would lik...
by JEL
Thu Jan 03, 2019 6:32 am
Forum: RTL-SDR Discussion
Topic: Unknown broadcast/tuning method?
Replies: 2
Views: 1799

Re: Unknown broadcast/tuning method?

It could be the tuning that is off. Try tuning in very small steps. I have found, when I get that 'StarWars' sound (in the scene in eps4, where they blow up the DeathStar, the radio-com sounds just like detuned SSB :) ), that detuning usually helps clear the sound. A few tens or hundreds of Hertz of...
by JEL
Sun Dec 23, 2018 11:10 pm
Forum: Signal Identification Help
Topic: Signal Identification Help
Replies: 8
Views: 19217

Re: Signal Identification Help

What exactly is the transmitter for the given signal? The central station or the vehicle itself? Because if the vehicle is the transmitter then naturally one would expect the signal strength to change as the vehicle travels around. Again; I can't confirm this, but if what I was told is true (that t...
by JEL
Sun Dec 02, 2018 10:41 pm
Forum: Signal Identification Help
Topic: Signal Identification Help
Replies: 8
Views: 19217

Re: Signal Identification Help

Somebody told me, but I can't confirm if it's true, that these signals are locators for vehicles (Fire-trucks, ambulances, work-trucks, company vehicles, stuff like that) so that central can always see where they are at any given moment (so they can dispatch them to where they are needed and so on) ...