Humminbird TRACKER PRO 128 Operation Manual

12, 10 Sensitivity. The Sensitivity function controls the sensitivity of the sonar receiver. The Tracker unit automatically adjusts the level of receiver sensitivity based on a number of factors includ- ing the depth of the water and the level of noise present. Noise can be caused by …

9, Humminbird TRACKER PRO 128 There are three different size fish sym- bols used to indicate the intensity of the sonar return. While signal intensity is a good indicator of relative fish size, differ- ent species of fish have different sonar characteristics, so it is not always possi- ble to distinguish fish size between …

19, 17 Fish ID. There are three selections available: OFF, ID+ ON, and ADJUST. The fac- tory setting is ID+ ON. With Fish ID OFF, sonar returns are displayed as “raw” information. There is no interpretation made by the unit. Selecting ID OFF also disables the fish alarm. ID+ ON enable…

22, 20 sage CONNECTED appears. If a series of dashed lines is shown, no transduc- er is connected or there is a problem with the transducer or cable. If you are using multiple transducers, switch between transducers to confirm the connections for each. Boat Speed/Water Temperature Connection. Other co…

26, 24 7. My unit loses power at high speeds. Your Tracker unit has over-voltage protection that turns the unit off when input voltage exceeds 20 VDC. Some outboard motors do not effectively regulate the power output of the engine’s alternator and can produce voltage in excess of 20 vol…

4, 2 USING THE TRACKER UNIT HOW SONAR WORKS HOW SONAR WORKS Your Tracker unit uses sonar to locate and define underwater objects, define the bottom terrain, as well as deter- mine distance. Sonar technology is based on sound waves. Your Tracker unit sends out a sound wave signal. With this signal it …