Search found 39 matches

by Airwind
Tue Nov 19, 2019 6:36 am
Forum: KerberosSDR
Topic: Feedback on possible KerberosSDR V2 Hardware
Replies: 32
Views: 2009

Re: Feedback on possible KerberosSDR V2 Hardware

For DC power, we could just provide a USB-C to barrel adapter. Would what work for you? I was trying to say that USB may not be the best connector for delivering power to the device. What I had in mind was to use a separate and proper standardized DC-socket instead. For example when I am driving ar...
by Airwind
Mon Nov 18, 2019 6:37 am
Forum: KerberosSDR
Topic: Feedback on possible KerberosSDR V2 Hardware
Replies: 32
Views: 2009

Re: Feedback on possible KerberosSDR V2 Hardware

A few thoughts from me: Personally I didn't quite like the enclosure of the V1 hardware, and I think it could have been done better. Perhaps use some extruded aluminium enclosure with side panels used for connectors? I would put all the digital ports like USB on a single side of the enclosure while...
by Airwind
Fri Sep 27, 2019 5:38 am
Forum: Signal Identification Help
Topic: Was expecting OOK but received this
Replies: 1
Views: 1738

Re: Was expecting OOK but received this

Unless your data has been captured poorly, that looks like pulse-position modulation to me.
by Airwind
Mon Jun 10, 2019 2:35 pm
Forum: User Projects
Topic: How to buy an SDR chip
Replies: 9
Views: 2534

Re: How to buy an SDR chip

Hey rtlsdrblog, you think maybe you can sell a few of these chips on your webstore?
by Airwind
Fri May 10, 2019 6:54 pm
Forum: Antennas
Topic: Antenna tuning, impedance matching, baluns, common mode currents, my head exploding...
Replies: 7
Views: 3142

Re: Antenna tuning, impedance matching, baluns, common mode currents, my head exploding...

I finally understand what a balun is! So I'm going to write this down in case some other confused soul comes along and tries to learn the same stuff. Anyway, what is a balun you ask? Well as it turns out I had the correct answer right underneath my nose all the time, but I was too confused with all...
by Airwind
Mon May 06, 2019 12:03 pm
Forum: Signal Identification Help
Topic: Decoding 433mhz windowblinds
Replies: 1
Views: 1496

Re: Decoding 433mhz windowblinds

Zoom in into one of those repeating signal chunks you see in audacity.
by Airwind
Sun May 05, 2019 2:30 pm
Forum: KerberosSDR
Topic: Some questions about KerberosSDR
Replies: 7
Views: 1699

Re: Some questions about KerberosSDR

kb3cs: I was merely theorizing that it should not matter how strong the received signal is (assuming it is within the receiver detectable boundaries) because all antennas would see the same power/signal increase and decrease relative to each other. And assuming antennas are identical then the recep...
by Airwind
Sun May 05, 2019 2:13 pm
Forum: KerberosSDR
Topic: Some questions about KerberosSDR
Replies: 7
Views: 1699

Re: Some questions about KerberosSDR

You could update the code if you could do the math and figure out the algorithm for various arrangements, I see, so it comes down to the algorithm then. but i'm not sure why you would want to do that. Other types of arrangement would be suboptimal, you'd essentially be sacrificing an antenna. Oh, h...
by Airwind
Sun May 05, 2019 9:29 am
Forum: KerberosSDR
Topic: Some questions about KerberosSDR
Replies: 7
Views: 1699

Re: Some questions about KerberosSDR

Hey, thanks for the answers, I really appreciate it. KerberosSDR is 4x RTL-SDRs with some circuitry to make it coherent. So even if you're not using the coherent features, you can still use it as 4 independent tuners. So you could use a splitter to connect a single antenna to all four ports. I'm not...
by Airwind
Sat May 04, 2019 11:07 am
Forum: Antennas
Topic: Antenna tuning, impedance matching, baluns, common mode currents, my head exploding...
Replies: 7
Views: 3142

Re: Antenna tuning, impedance matching, baluns, common mode currents, my head exploding...

Get a copy of the ARRL or RSGB antenna handbook and you have the Basics in a simple form. Here's a snippet from the ARRL handbook 2017, chapter 21.2.3: Baluns A balun can be constructed in a number of ways: the simplest being to coil several turns of coaxial cable at the antenna feed point. This cr...