Powering Down Multiple Transducer / Sonar Module Sets

[chartertom]

I am wondering if the following Raymarine system configuration will result in an interference between transducers. My vessel currently has installed an Airmar B164 transducer / Raymarine DSM300G sonar module networked to a pair of e125 multi-function displays (MFD’s). I am looking to add an Airmar M265LH transducer / Raymarine CP570 sonar module networked to the same pair of e125 MFD’s.
I am wondering if switching between transducer / sonar modules in a single pane using the MFD’s fishfinder menu will power on one transducer / sonar module set and simultaneously power off the other transducer / sonar module set. The MFD operation manual for version 17.46 section 15.8, page 211 suggests the unused transducer / sonar module set will be powered off.
If both transducer / sonar module sets remain on, will this result in an interference between transducers? If true, could I install a power switch to each sonar module to manually power down the unused set?