The manual page:
http://wiki.mikrotik.com/wiki/Manual:Spectral_scan
shows what the options are called and what they do, but not how to actually enter the command (this would presumably be more obvious to someone with more experience).
When I try to run the example on this page (via the terminal)
interface wireless spectral-scan
number: wlan1
it returns the error “failure: allowed ranges [2402;2494]”.
After typing in “spectral-scan”, the letter “r” auto-completed to “range=”, and “2” → “2.4ghz” (which is one of the values mentioned in the manual) but the error still occurred.
Dustin