Timeline for 433.92 Noise Is Different Across The Same Type Of Devices
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Mar 10, 2017 at 3:41 | answer | added | metacollin | timeline score: 4 | |
| Oct 30, 2016 at 2:47 | history | tweeted | twitter.com/StackElectronix/status/792558501394612224 | ||
| Dec 8, 2015 at 21:05 | comment | added | got trolled too much this week | Also you may be interested in this comparison [it's in German, use google translate if necessary] between the two modules. The XY-MK-5V just uses a LM358 and makes it go into saturation whenever signal is received. It doesn't seem to have a purpose-made squelch circuit, so it's probably just parts variation that you see in action. | |
| Dec 8, 2015 at 20:18 | comment | added | got trolled too much this week | I can't tell you why two seemingly identical boards from the same mfg have different squelch levels (bad QA?), but unlike what Brian suggested, it's not a defect to have squelch. Setting it is a tradeoff between sensitivity and getting noise as "data", so it depends on what you want. | |
| Nov 3, 2015 at 1:27 | comment | added | tridy | I have added one more image showing the noise before and after the signal from the small windows. | |
| Nov 3, 2015 at 1:25 | history | edited | tridy | CC BY-SA 3.0 |
added additional image showing whole signal
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| Nov 3, 2015 at 1:04 | comment | added | tridy | Actually the first two have the noise after the signal. It is that the remote control signal ends with the long pause. If you look inside the small window (that shows the whole recording) of each of the 3 big windows you can see that the noise comes back. The "big" window shows the zoomed in part of the small window. I should have covered the area when the noise come back by the selection as well, sorry. | |
| Nov 3, 2015 at 0:15 | comment | added | user16324 | Notice that none of them have noise after the data burst, when AGC has turned the gain down. The "quiet" one is either not quite as sensitive, or has a small DC offset on its comparator (data slicer) - it's not actually performing as well as the others! Be interesting to see how long it takes before the noise comes back for the others... | |
| Nov 2, 2015 at 23:52 | history | edited | tridy | CC BY-SA 3.0 |
added device image
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| Nov 2, 2015 at 23:38 | comment | added | tridy | thanks. I have added the info/tech doc that I had to the question | |
| Nov 2, 2015 at 23:36 | history | edited | tridy | CC BY-SA 3.0 |
added technical data, document link and content
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| Nov 2, 2015 at 23:08 | comment | added | PlasmaHH | What makes you think one can answer that without any information about the devices like schematics? | |
| Nov 2, 2015 at 23:01 | review | First posts | |||
| Nov 3, 2015 at 3:35 | |||||
| Nov 2, 2015 at 22:58 | history | asked | tridy | CC BY-SA 3.0 |