Control Functions

USING THE 150SX

the transducer, there is often enough

Thermocline Second Return

energy left in the signal to be reflected

off the surface of the water back to the

bottom a second time. Second returns

appear as a slightly weaker bottom

representation exactly twice the depth

of the primary bottom return. The

second return is most likely to occur in

shallow water and in areas of relatively

hard bottom.

Fish ID. The 150SX uses advanced

signal processing to further evaluate any

sonar return between the surface and

the bottom. For instance, a small school

of bait fish usually appears as a dense

cluster of individual dots. If the return meets certain additional criteria, a fish symbol will be assigned. There are three different size fish symbols used to indicate the intensity of the sonar return. While signal intensity is a good indicator of relative fish size, different species of fish have different sonar characteristics, so it is not always possible to distinguish fish size between varying species. The signal intensity is "normalized" for depth so that a small fish close to the boat does not appear as a large fish symbol.

ID+ adds an additional piece of information to help the user locate fish. On selected fish symbols, the digital depth of the designated fish is drawn to help locate the fish vertically.

CONTROL FUNCTIONS

The 150SX uses a simple five button keypad for all user input. Press any button and an audible “chirp” confirms the control input. If a button has no function or is inappropriate for the situation, an audible “error” is heard. The unit sounds multiple chirps.

Power. The Power button powers the 150SX up for normal operation. When the unit is on, POWER turns the unit off. POWER can also be used to go directly into Simulator mode. To enter simulator, with the unit powered off, press and hold POWER for several seconds until a continuous chirp is heard.