Timeline for FFT showing 2 signals - GNU Radio
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 27, 2018 at 3:00 | history | tweeted | twitter.com/StackHam/status/1078123404132319234 | ||
| Dec 18, 2018 at 20:00 | vote | accept | Marcos Pinho | ||
| Dec 18, 2018 at 18:05 | comment | added | Marcus Müller | @GlennW9IQ in my world, there's no difference :) But yeah, I'd agree, "tone" is ambiguous! | |
| Dec 18, 2018 at 17:31 | comment | added | Glenn W9IQ | @MarcusMüller I would think a better description of OOK would be that the carrier (not a tone) is switched on and off by the modulating signal. | |
| Dec 18, 2018 at 16:07 | answer | added | Kevin Reid AG6YO♦ | timeline score: 10 | |
| Dec 18, 2018 at 15:53 | comment | added | Marcos Pinho | @MarcusMüller, I inserted the pictures. I can't test right now, but i remember that when i move the transmitter to the nearest antenna, others signals show up. Is this caused by the near field? | |
| Dec 18, 2018 at 15:46 | history | edited | Marcos Pinho | CC BY-SA 4.0 |
added 255 characters in body
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| Dec 18, 2018 at 15:42 | comment | added | Marcus Müller | Marcos, it might be good to show the time signal, not only the spectrum. If my assessment is right, your SNR should be good enough for us to directly see the OOK in the time signal, very clearly. | |
| Dec 18, 2018 at 15:38 | comment | added | Marcus Müller | @rclocher3 On-Off Keying. The transmitter simply switches a tone on and off to transmit data (e.g. bits). A very simple method of transmitting data, highly inefficient power-wise (i.e. with the same average bit energy, you could get much more robust transmission methods), but easy to transmit and possible to receive using incoherent power detection. | |
| Dec 18, 2018 at 15:02 | comment | added | rclocher3 | What's OOK mean? | |
| Dec 18, 2018 at 13:52 | comment | added | Marcus Müller | hm, no, since I see no sign of aliases or nonlinearities (try to reduce power, e.g. by moving the transmitter further away), I'd say there are to power sources. By the way, you "similar amplitude" is a difference in powers of a factor of 100… | |
| Dec 18, 2018 at 13:48 | history | asked | Marcos Pinho | CC BY-SA 4.0 |