Ambiguous range for mutlpiple PRF

[bladesong]

Homework Statement

We are given two PRFs, say 300 and 400Hz, and asked what the ambiguous range is.

Homework Equations

The Attempt at a Solution

None. The prof hasn't posted any notes, the book says nothing about multiple PRFs, and I can't find anything on the internet. There has to be a fairly simple way, but I can't find it. Any help is appreciated; this is due teusday.

 

[NascentOxygen]

wiki has something about ambiguity http://www.ask.com/wiki/Pulse_repetition_frequency