Limit log or lin with frequency  
Log or Lin: 
dB logarithmic with frequency dB linear with frequency 

Limit:  Frequency 1: Limit 1: 
kHz / MHz dBxx 
Frequency 2: Limit 2: 
kHz / MHz dBxx 

Frequency:  kHz / MHz  
Limit:  dBxx 
 Limit calculator for dB's logarithmic or linear with the frequency.
 Select log or lin and give the limit values and corresponding frequencies.
 Give the frequency where to calculate the limit (frequency has to be within the limit range!)