VEXILAR FLX-12 User Manual

11
Cone angle vs
Diameter of Coverage
Depth 8° 9° 12° 19° 20°
10' 1.4' 1.6' 2.2' 3.4' 3.5
20' 2.8' 3.2' 4.3' 6.7' 6.9
30' 4.2' 4.7' 6.3' 10.0' 10.6
40' 5.6' 6.3' 8.4' 13.4' 14.1
50' 7' 7.9' 10.6' 16.7' 17.6
60' 8.4' 9.4' 12.6' 20.8' 21.2
70' 9.4' 11.0' 14.7' 23.4' 24.7
80' 11.2' 12.6' 16.8' 26.8' 28.2
90' 12.6' 14.2' 20.0' 30.1' 31.7
100' 14' 15.7' 21.0' 33.5' 35.3
120' 16.8' 18.9' 25.2' 40.2' 42.3
150' 21' 23.6' 31.5 50.2' 52.9
DEAD ZONE
Beam angle has a large eect on the performance of your asher. There is more to it than simply area
of coverage. The correct beam angle to use depends entirely on your application. If you are shing
for suspended sh then you would be pleased with the performance of
the 19° cone. However, if you were going after sh that are holding right
on the bottom along a steep drop-o, you would have better results with
the 9°. This is because of something called dead zone. Dead zone is
an area within the transducer’s cone of sound that is blind to you. The
wider the beam angle, the greater the possible dead zone. The sonar
will mark bottom as the nearest distance it sees. If you are shing over
a slope, it may see the high side of the slope, at the edge of the cone,
and mark that as bottom. The sh that are holding on the bottom on
the low side of the slope will be invisible to you because they are actually
within the bottom signal on your depth nder. A narrower beam angle
will reduce this eect.
Output Power
Your depth nder puts out a constant amount of power, or sound energy. It does not matter where you have the gain level set. Gain simply controls
how much you amplify the signal that is returned from below. Therefore, a narrow beam transducer will appear to be much more powerful than a
wide beam transducer. This is because you are putting the same amount of power into a smaller area. This can be an advantage if you are shing
in deep water or a detriment if you are shing in shallow water. A narrow beam transducer can be overpowering in shallow water. The use of the
LP (Low Power) Mode on your asher, or the optional S-Cable (page 70), will solve this problem.
Remember to not use LP Mode or the S-Cable in depths beyond 20 feet where you will nd that you need to turn your Gain Control up
much higher than normal. This will give a noisy display and make interference from other units much more likely.
Depth Finder
Reads Depth Here
DEAD
ZONE

VEXILAR FLX-12 Specifications

General

Brand	VEXILAR
Model	FLX-12
Category	Sonar
Language	English