Search found 124 matches

by JEL
Tue Jan 29, 2019 6:55 am
Forum: RTL-SDR Discussion
Topic: Long USB-cable vs long antenna-cable?
Replies: 18
Views: 32313

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: 32313

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: 32313

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: 1646

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: 18523

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: 18523

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) ...
by JEL
Sun Oct 28, 2018 12:31 am
Forum: RTL-SDR Discussion
Topic: Listening to airband in Belgium ?
Replies: 1
Views: 2208

Re: Listening to airband in Belgium ?

mode: AM
bandwidth: 12500
by JEL
Thu Oct 25, 2018 5:32 am
Forum: Troubleshooting Help
Topic: Reception problem nearby signals
Replies: 9
Views: 5305

Re: Reception problem nearby signals

One thing that just dawned on me: The AGC tab... (the one below Audio tab) Do you have "Use AGC" switched ON? If not; then try that. Set the threshold to something lower than the noise-floor (or just turn it as low as it goes while testing; -160) Decay and slope values are not really important durin...
by JEL
Thu Oct 25, 2018 4:54 am
Forum: Troubleshooting Help
Topic: Reception problem nearby signals
Replies: 9
Views: 5305

Re: Reception problem nearby signals

JEL, do you think if I could get a more robust SDR I would solve this problem? rtlsdrblog knows more about this than I do. I'm not sure. I have no issues receiving with either a 'cheap' SDR or the AirspyR2 that I mainly use. I don't have any airports within listening-distance though, so I have no a...
by JEL
Tue Oct 23, 2018 5:56 pm
Forum: Troubleshooting Help
Topic: Reception problem nearby signals
Replies: 9
Views: 5305

Re: Reception problem nearby signals

Yes, I have the "filter audio" ON. Ok, too bad it wasn't as simple as that. increasing the RF GAIN to 17dB I solve the problem of nearby aircraft I can't say that makes any sense to me (that an increase in gain let's the too-strong signals come through) but sometimes the world of radio-signals is m...