help generating low freq tones

I have created a project that measures sub audiable tones and compares them to a lookup table to see if they are valid. To do this I used the pulsin command. I wish to generate a tone out based on the same lookup table. The tones fall between 50Hz and 250Hz and I am looking a 0.1Hz reolution. I have been able to do this with pulsout but I need to have a continous output and still use the pulsin for checking incomming tone. Is there a better way to do this otherwise I will need to use 2 Pic's?