
Originally Posted by
sfw1960
I change it - I usually run with the 200 kHz off my 859DI so no cross talk in deeper water - and the DI is often 811-844 kHz because the H12 SI up front is running 800 kHz.
I use lower freq. Mega DI for more coverage and higher freq. on SI for best details and they are usually odd multiples so the Mega doesn't cross talk any when running Mega SI & DI.