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- 6 -
Too much GAIN will flood out the ability to differentiate targets and clutter the display. Fish - Fish
will generally appear as separate targets from the bottom. A fish target can be displayed as
RED,
ORANGE
or GREEN, depending on where the fish is located within the cone.
Reading Your Jig
– The M3 will pick up and display small objects like jigs, spilt shot, or swivels.
When tuning the unit to display your lure or bait, lower the object to the desired depth and turn up
the GAIN until you see the jig on the display. It is important that the GAIN be set so it displays the
jig as you raise or lower it. Sound waves emitted by the M3 bounce off targets and return with the
strength of the targets’ density. Denser targets return with a stronger signal, displayed as RED.
Less-dense objects (small fish) return a medium-strength signal, displayed as GREEN. The
least dense objects (weeds, bait-fish, lure) return a weak signal, displayed as
ORANGE
. Objects
on the edge of the sound cone may appear as
ORANGE
. A fish moving through the cone may
appear first as
ORANGE
then GREEN, then RED, depending on where the fish is located within
the cone.
NOTE:
Too much GAIN will cause clutter and may make it difficult to distinguish other targets like
fish near the bottom. When tuning the unit to display lures or bait, make sure that the objects are
in the center of the hole and therefore in the center of the transmit beam. If there’s water current
(some lakes have underwater current or movement) and the lure doesn’t weigh much, it may move
to the outer edge of the signal or out of the transmit beam altogether. This will make it difficult or
impossible to pick it up on the display.
Dead Zone
- All sonar units will have a dead zone in certain circumstances. This occurs on sharp
drop-offs where the transmit beam (cone) hits the shallower edge of the drop-off and returns
before the deeper edge returns. This in effect creates an undisplayed area between the shallower
and deeper water within the transmit beam.
Product Performance Specifications
Output Power
Depth Ranges
Transmit Frequency
Current Draw
Operating Voltage
Display Colors
Transducer Cone Angle
Target Separation
2000 watts peak to peak
20, 40, 80, & 160 feet
200 KHz
300 mA
10.5 to 15 volts (12-volt DC)
Red, Orange, Green
20 degrees (all transducers)
1.5
inches (20-foot depth scale)
1 inch
in Zoom Mode (20-foot depth
scale)
WARRANTY - SONAR
MarCum warranties this product to be free from defects in materials and workmanship for two
years from the date of purchase. This warranty applies to customers who properly complete
the online product registration form found on the MarCum Technologies Website:
www.marcumtech.com/support.
MarCum Technologies will repair or replace any components that fail in normal use. Failures due
to abuse, misuse, unauthorized alteration, modification, or repair are not covered. The warranty is
valid only for the original owner who purchases the unit from an authorized dealer. An original
sales receipt dated within the warranty period is required for all warranty claims.
In an effort to best serve our customers, MarCum Technologies has set a standardized battery
warranty policy. Battery warranty coverage requires a proof of purchase. Please see our
website, www.
M
ar
C
umtech.com/support, for full details on warranty coverage.
