Humminbird AS GR4 Finding the Cause of Noise, Matrix Fishing System Accessories, Boat’s engine

Finding the Cause of Noise

Electrical noise usually affects the display with many black dots at high speeds, and high sensitivity readings. One or more of the following sources can cause noise or interference:

Possible Source of Noise	Isolation
Other electronic devices	Turn off any nearby electronic devices to see if the
	problem goes away, then turn them on one at a time to
	see if the noise re-appears.
The boat’s engine	To determine whether the boat’s engine is the source of
	the noise, increase the RPMs while the boat is in neutral
	and stationary to see if the noise increases pro-
	portionately; if noise appears when you rev the engine,
	the problem could be the spark plugs, alternator, or
	tachometer wiring. Replace the spark plugs with resistor
	plugs, install an alternator filter, or route the control head
	power and transducer cables away from the engine
	wiring.
Cavitation from the boat’s	Turbulence created by the propeller can cause noise;
propeller	make sure the transducer is mounted at least 15” (38 cm)
	from the propeller, and that the water flows smoothly
	over the face of the transducer at all times.

Matrix Fishing System Accessories

Accessories customize the Matrix Fishing System to your needs and enable you to stay on the edge of new technology. When an accessory is connected to the Matrix Fishing System, additional menus and readouts are added automatically to the Main Menu System. Accessories available today that are supported by your Fishing System include:

WeatherSense™ Fishing Condition Monitor: purchase and plug in the WeatherSenseTM accessory to your Matrix Fishing System to obtain barometric pressure readouts and trend data in real time.

Wireless Sonar Link (WSL): purchase the Wireless Sonar Link (WSL) accessory to receive remote sonar signals from a SmartCastTM Remote Sonar Sensor (RSS). Radio signals from the RSS are received by the WSL and are transmitted over the Accessory Bus to the Matrix Fishing System.

PC Connect Cable: Purchase the PC Connect Cable to connect the Matrix Fishing System to a PC in order to upload product software updates and new features obtained from www.humminbird.com. This accessory requires the MSWindows-compatible HumminbirdPC™ software downloaded from our website to your PC in order to communicate with the Matrix Fishing System.

Be sure to check out our website www.humminbird.com for additional new and exciting accessories to grow your Matrix Fishing System!

NOTE: Each accessory requires a separate purchase. You can visit our website at www.humminbird.com or contact our Customer Resource Center at 1-334-687-0503 for additional details.

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