I have 3 TZ3 MFDs which I added a furuno bff3 uhd with a B265LH transducer installed yesterday. My TZ3 still only shows 50/200 frequency on the sounder screen. I read in some other posts this view is normal but in the actual menu, there is no mention of chirp and the only selectable frequencies are 50, 200 and dual. Is that normal or is some setting incorrect. Also the 265 transducer is fairly close to the transducer for the RD33, will they interfere with each other, should they be synched in anyway? Thank in advance for the help.