Chapter 6: Using the Fishfinder 135DSM SetupCertain conditions, such as a hard bottom or other vessels equipped with a fishfinder,may affect the DSM. The following DSM Setup controls enable you to change settingsto allow for this. As they are held in the DSM, they are applied system-wide.Any changes that you make to the set up are saved when you power off the digitalsounder module (DSM) except for the following:MENU ITEM OPTIONS(Default in bold)DSM Reset...Restore all settings on the DSM to factory default. When per-forming a DSM Reset, it is normal to briefly loose connectionwith the DSM.YESNOTrip Counter Reset...Resets the Trip Counter of the DSM.YESNOSONAR Interference RejectionRemoves spikes caused by other fishfinder-equipped vesselsAUTOLOWMEDIUMHIGH2nd Echo Interference RejectionMinutely adjusts the ping rate according to the 2nd echo level.Results in better sensitivity of the image.OFFLOWHIGHPing Rate Limit (per sec.)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.26 pings per second5 to 30 pings per secondPing enableThe sonar ping is normally enabled. It can be disabled. This isuseful when other equipment is being tested, or if someone isdiving beneath the boat.DisabledEnabledType Function Reverts toSoft keys Gain AUTO (automatic)Auto Gain Mode MED (medium)TVG AUTO (automatic)Range AUTO (automatic)Range Shift 0Power AUTO (automatic)Setup Menu Ping Speed Limit 26Ping Enable Enabled
