Anybody using spectral scan in 2.4Ghz?
I’m not confident I’m reading this correctly.
Looks like a lot of noise to me.
I have a rubby ducky antenna on RB411/R52nM.
Is there a tutorial anywhere?
I read the manual. http://wiki.mikrotik.com/wiki/Manual:Spectral_scan
Tried it with R52n - ufl version. Similar results.
Really.
Nobody tried using this in 2.4Ghz?
I’ve been playing with it. I was hoping for more experienced answers so I could learn something too.
I can definitely see where shielding and separation are required on sectors, but I haven’t done a lot of playing with spectral scanning.
I only have a few bits of hardware that are supported and a scan takes a chunk of customers offline.
I am half thinking about an omni on each tower as a backup and a set of “ears” to listen to the neighborhood and help troubleshoot problems.
Where is the radio located? If you are anywhere near another transmitter the noise floor is pretty much busted. I’ve been playing a bit and it seems my WRT54GS has a cleaner signal drop off than my Atheros equipment. I’m not too happy about that, though it isn’t conclusive. I really need to look into it deeper.
This is just a test box that I was thinking about using to help track down sources of interference.
I have an old omni on still in place on a sectorized tower. Very helpful using “freq. usage”. I was planning on replacing the wireless card with one compatible with spectral scan.
It seems to work great in 5Ghz range. In 2.4Ghz, all I get is noise.
With the test above, the cpe was put in a steel desk drawer facing down. I thought it was a nice quiet place 
I think I’ll have better luck using “freq. usage” with a small yagi to track down interference for now. At least in 2.4Ghz range.
I only use scan or freq. usage on an active tower if it’s not working correctly anyway.
What do you think is the reason people try to switch to 900MHz, 5GHz, 700MHz etc? 2.4 is overcrowded. You have bluetooth devices, microwave ovens, neighbors wifi, and all kinds of other 2.4GHz devices in this spectrum. So yes, it’s full of noise, unless you are in the middle of the desert, with this device being the only electronics device on right now 
the spectral scan doesn’t reflect what is seen in freq usage as seen in the pic.
Frequency usage shows only 802.11 devices, Spectral Scan shows everything, like those ovens and bluetooth devices
Thanks for the info.
Now I just wish there was an attenuation setting.
Sorry for offtopic, but i am in Saudi Arabia, and i notice in the middle of desert it is also crowdy
It is not a bug, just desert have now wireless links too
This is so true. I did a lot of 2.4 GHz scanning recently, and I often get almost incomprehensible mush on that paltry >100 MHz. 5GHz is heaven sent in comparison.