11.14 Sounder set–up menu optionsThis section describes the settings you can change using the sounder set up menu: (Menu > Set-up > Sounder Set-up). The set upmenu contains settings that are likely to be changed infrequently.Menu Item Description OptionsInternal Sounder Switch the built in sounder on and off, for use when you havemore than one multifunction display with internal sounder.Note: Disabled on non-sounder variants.Note: Disabled if external sounder detected.• On• OffPing Rate Limit Provides a speed limiter; it is useful to adjust the ping rate tosuit local conditions. For example, the ping rate may be too fastwhen there is a hard bottom in shallow water. This setting revertsto 26 pings per second when the DSM unit is powered off.Note: Ping rate limit is disabled if Ping rate is set to hyper inthe presentation menu.• 5 — 30 pings per secondPing Enable The sonar ping is normally enabled. It can be disabled. This isuseful when other equipment is being tested, or if someone isdiving beneath the boat. This setting reverts to Enabled whenthe DSM unit is powered off.• On• OffInterference rejection Removes spikes caused by other fishfinder-equipped vessels.Note: Interference rejection will be disabled in Hyper Pingmode• Auto• Low• Medium• High2nd Echo IR Adjusts the ping rate in small increments, according to the 2ndecho level. This results in better sensitivity of the image.Note: 2nd Echo IR will be disabled in Hyper Ping mode• Off• Low• High212 e7 / e7D — User reference
