[CA] [CA11] losing signal-funky pictures

[Chuck - Raymarine - Moderator]

saburke17,

Please click here to view a FAQ addressing frequency spectrum for CHIRP associated with RV transducers. While some degree of noise would not be uncommon as 200kHz is within the CHIRP frequency spectrum of the RV transducers, it is typically not significant and may be eliminated if the MFD is operating with the latest available LightHouse 3 software (v3.5.40 at the time of this response). By selecting Dual Channel Ping Mode (MENU->SETTINGS->SOUNDER->DUAL CHANNEL PING MODE) when using the Sonar channel, the reported noise may be cleared from the high CHIRP Sonar imagery produced by the RV transducer.

Should the problem persist, then it would be recommended that the system be tested under the "Quiet Ship" conditions reference previously and if duplicated under quite ship conditions that the DST800 be disconnected to determine whether the symptoms abate.