ADVANCED FEATURES
USING ALTERNATIVE TRANSDUCERS
Boat Speed/Water Temperature Connection. Other connections tested include the boat speed and surface water temperature sensors. These accessory sensors can be purchased independently or together as a single sensor (see the Humminbird Accessories catalog). If the sensors are connected and working properly, a “connected” message appears.
The speed input feature only works when the boat is in motion as the paddle wheel on the speed sensor must rotate to be detected.
Voltage Input. Another connection tested is the voltage input, and is especially helpful in diagnosing input voltage problems. The current input voltage is displayed. If voltage fluctuations or power supply in excess of 20 VDC or less than 10 VDC is suspected, use the diagnostic screen to confirm input voltage. Often, small outboard motors do not effectively regulate voltage when operated at high engine speeds.
Use Diagnostic while running the boat at high speeds to show the voltage gain. Also, if you are using the 350TX in portable configuration or from the trolling motor battery, Diagnostic can be used to evaluate the health of the battery by showing the current voltage.
Total Time. The total time category indicates the total time the unit has been in use since shipped from the factory. It is normal for some hours to appear in the total time when the unit is new due to factory testing. While this is often of interest to the user, it is primarily a diagnostic tool for the repair technician should the unit need service.
USING ALTERNATIVE TRANSDUCERS
Wide side operation
The Wide Side Transducer is a specialized "side- 
looking" transducer that is extremely useful for 
bank fishing or looking for bait fish in open 
water. The Wide Side transducer uses three 
different sonar elements that transmit signals to 
the left, right and straight down from your boat. 
The downward beam is 200 kHz with a 24 
degree area of coverage. This beam maintains a 
continuous digital depth readout from the 
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