Search found 3 matches

by senthilka
Tue Oct 16, 2012 3:50 am
Forum: Help: General
Topic: Need Help! CDEF function Convert watts to dbm
Replies: 5
Views: 1781

Re: Need Help! CDEF function Convert watts to dbm

OK! Finally figured this out. Cacti does logarithm in natural log. so to convert it to a base 10 log.
we need to divide the solution by 2.303

zzzzz.....
by senthilka
Thu Oct 11, 2012 4:05 am
Forum: Help: General
Topic: Need Help! CDEF function Convert watts to dbm
Replies: 5
Views: 1781

Re: Need Help! CDEF function Convert watts to dbm

Couldnt work. the problem seems to lie with the way cacti performs the log fuctions. Whats the 10 before the log function meant to be? Cacti is not able to process the formula. Has anyone else encounter any problems with the way cacti performs log functions? P.S. Have no idea why Cisco thinks its a ...
by senthilka
Tue Oct 02, 2012 1:49 am
Forum: Help: General
Topic: Need Help! CDEF function Convert watts to dbm
Replies: 5
Views: 1781

Need Help! CDEF function Convert watts to dbm

Hi Guys, iam trying to input the following formula into cacti to convert watts to dbm P(dBm) = 10 · log10( P(mW) ) Example Convert 20mW to dBm:, P(dBm) = 10 · log10( 20mW ) = 13.0103dBm Does anyone know how? i have come out with this. but its not correct. cdef=CURRENT_DATA_SOURCE,0.001,*,LOG,10,* ci...