Архив за 15.02.2019

Arduino SDR projects?

I started learning how to use an Arduino about a year ago, and started using an SDR a bit more recently. I feel sometimes like my SDR use overshadows learning my Arduino, and I was wondering if there are any notable SDR projects that involve an Arduino in some way

submitted by /u/DuckEsquire
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This signal makes no sense…

This signal makes no sense... submitted by /u/UseTwoHams
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Comment on RTL-SDR Blog V.3. Dongles User Guide by rehn

I am using Q. On I get absolutely nothing

Comment on RTL-SDR Blog V.3. Dongles User Guide by Robert Young

You use Q direct not I

Direct Sampling via Command line

Is it possible to do Direct Sampling on an RTL-SDR via CLI or Service in Linux instead of a GUI client like CubicSDR or SDR#? I'd like to be able to decode lower frequency data signals via a headless raspberry pi and was wondering.

submitted by /u/callen9292
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Comment on Quick Start Guide by rehn

Hi
I bought a SDR dongle V3 from Electrokit in Sweden
I have a problem i direct sampling mode.
If I connect the dongle direct to my USB port I get nothing but the noise from the unit itself.
With or without antenna connected.
If I connect the dongle using extension cord I get some signal, but almost only very strong noise.
It seems like its only the USB cord that function as antenna in direct sampling mode and the
normal antenna connector is not used.

Am I missing something, or is my unit broken ?

Comment on RTL-SDR Blog V.3. Dongles User Guide by Rehn

Hi
I bought a SDR dongle V3 from Electrokit in Sweden
I have a problem i direct sampling mode.
If I connect the dongle direct to my USB port I get nothing but the noise from the unit itself.
With or without antenna connected.
If I connect the dongle using extension cord I get some signal, but almost only very strong noise.
It seems like its only the USB cord that function as antenna in direct sampling mode and the
normal antenna connector is not used.

Am I missing something, or is my unit broken ?

regards
John rehn

Antenna for SDR getting Started

So I recently got an RTL SDR, I've been playing around and receive VHF signals just fine. However I'm interested in trying to listen in on shortwave / AM (medium wave) / HF frequencies. I've been trying some random wire lengths and have had little success. So far I've been able to pick up a few short wave stations however they're very poorly received. Even the AM bands I don't receive very well. I have a local AM station and I can't even seem to get reception on that very clearly, but my sterio in my car has no problem with the regular antenna on the car.

My main question is how do I get started with an antenna. What sort of length, type of wire, do I need a balun, vertical, horizontal, etc. I'd ideally like to have 1 antenna that's easy to put up and can receive most of what I'm looking to listen to. I have a little portable shortwave radio and that seems to receive lots of short wave with a small antenna. Just not sure what i'm doing wrong. I didn't think I'd have to tune the antenna quite so much to just receive. Also, I've been using direct sampling q branch for hf/shortwave signals , is this the best Thanks

submitted by /u/mindgame11
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Antenna Rotator Suggestions?

I'm looking for an Az-El rotator to rotate a2.4GHz wifi grid dish ~5 pounds and a Arrow II Satellite Antenna. It also needs to be controllable by a computer, it'd be cool if rotctld already supported it. I know is kind of weird requirements but any help is greatly appreciated.

submitted by /u/rg422
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Comment on YouTube Tutorial: Eavesdropping on DECT6.0 Cordless Phones with a HackRF and GR-DECT2 by EMM

Hi.

Are these the DECT PCMCIA you are talking about?
https://www.ebay.es/itm/Telefonica-DECT-PCMCIA-Karte-TYP-III-COM-ON-AIR-dedected-compatible/162090759805

For the listed price I’m tempted to give it a try 🙂

Refards,

EMM

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