Humminbird 585C - Manual (Page 24)

41 40
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 How to Isolate It
Humminbird® Fishfinder Accessories
Accessories customize the Humminbird® to your needs and enable you to stay on the edge
of new technology and to catch more fish. When an accessory is connected to the system,
additional menus and readouts are added automatically to your Humminbird® menu
system. Accessories available today that are supported by your Humminbird® include:
Temperature/Speed: simply plugs into the Humminbird® control head and provides
real time speed and temperature readouts, as well as a valuable Triplog function.
NOTE: If an external Temperature/Speed (TS-W) or Temperature (TG-W) accessory is connected
AND a transducer with temperature built in is connected at the same time, the TS-W or TG-W
accessory will override the temperature built in to the transducer.
Be sure to check out our website www.humminbird.com for additional new and
exciting accessories to grow your Humminbird® FishFinder!
NOTE: Accessories require a separate purchase.
Other electronic devices
The boat’s engine
Cavitation from the boat’s
propeller
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.
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
proportionately; 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.
Turbulence created by the propeller can cause noise;
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.
Specifications
Depth Capability ................................................................................ 1000 ft (330 m)
Power Output .................................................................................. 300 Watts (RMS)
2400 Watts (Peak to Peak)
Operating Frequency.............................................................. 200 kHz Single Beam
Area of Coverage ................................................................ 20° @ -10 dB in 200 kHz
Target Separation .................................................................... 2½ Inches (63.5 mm)
Power Requirement .................................................................................... 10-20 VDC
LCD Matrix............................................................................ 320 V x 240 H TFT Color
Transducer.................................................................................................... XHS-9-20-T
Transducer Cable Length............................................................................ 20 ft (6 m)
Product specifications and features are subject to change without notice.
FF585c_Man_English_531363-1_B.qxd 12/27/2004 8:33 PM Page 46