•−• ••−• −•−• •− ••−• • RF Cafe in Morse Code: Hear It
Spurious-Free Dynamic Range
Spurious-free dynamic range (SFDR) is two-thirds the difference between the 2-tone, third-order intercept point (IP3) and the minimum discernible signal (MDS). Referring back to Figure 1, it can be seen that the 3rd-order product line has a 3:1 slope while the fundamental output line has a 1:1 slope. Therefore, the 3rd-order products are always three times as far from the IP3 as the fundamental output. If you use the SFDR as the power of the output tones (dBm) and plug it into the equation for IP3 calculation from the Intercept Points (IP3 & IP2) section of the RF Cafe web site, the power of the 3rd-order products will be right at the MDS power level.
Figure 1
Note: Numbers shown are NOT total page views; they are unique IP addresses for each 24-hour period (i.e., unique visitors). Typical page view counts are at least twice the reported unique visitor number.
RF Cafe Erie, PA (814) 833-1967
A Disruptive Web Presence™ GPS Coordinates: N 42°04.577', W 080°11.757'
