3.The water may be deeper than the sonar's ability to find the bottom. If the sonar can't find the bottom signal while it's in the automatic mode, the digital sonar display will flash continuously. It may change the range to limits far greater than the water you are in. If this hap- pens, place the unit in the manual mode, then change the range to a realistic one, (for example, 0-100 feet) and increase the sensitivity. As you move into shallower water, a bottom signal should appear.

4.Check the battery voltage. If the voltage drops, the unit's transmitter power also drops, reducing its ability to find the bottom or targets.

Bottom echo disappears at high speeds or erratic digital read- ing or weak bottom echo while boat is moving:

1.The transducer may be in turbulent water. It must be mounted in a smooth flow of water in order for the sonar to work at all boat speeds. Air bubbles in the water disrupt the sonar signals, interfering with its ability to find the bottom or other targets. The technical term for this is cavitation.

2.Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. Try using resis- tor spark plugs or routing the sonar unit's power and transducer cables away from other electrical wiring on the boat.

No fish arches when the Fish I.D. feature is off:

1.Make sure the transducer is pointing straight down. This is the most common problem if a partial arch is displayed.

2.The sensitivity may not be high enough. In order for the unit to dis- play a fish arch, it has to be able to receive the fish's echo from the time it enters the cone until it leaves. If the sensitivity is not high enough, the unit shows the fish only when it is in the center of the cone.

3.Use the Zoom feature. It is much easier to display fish arches when zoomed in on a small range of water than a large one. For example, you will have much better luck seeing fish arches with a 30 to 60 foot range than a 0 to 60 foot range. This enlarges the targets, allowing the dis- play to show much more detail.

4.The boat must be moving at a slow trolling speed to see fish arches. If the boat is motionless, fish stay in the cone, showing on the screen as straight horizontal lines.

NOISE

A major cause of sonar problems is electrical noise. This usually ap- pears on the sonar's display as random patterns of dots or lines. In se- vere cases, it can completely cover the screen with black dots, or cause the unit to operate erratically, or not at all.

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Lowrance electronic X135, X136DF, X125, X126DF manual No fish arches when the Fish I.D. feature is off, Noise
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X126DF, X136DF, X135, X125 specifications

Lowrance, a leading name in marine electronics, has made significant strides with its line of fish finders and chartplotters, particularly the X135, X125, X136DF, and X126DF models. These devices are engineered for anglers and boating enthusiasts seeking advanced charting, navigation, and fish tracking technologies.

The Lowrance X135 is equipped with a 7-inch display, delivering a clear view of sonar readings and navigational data. Its advanced sonar technology includes a powerful 4000-watt peak-to-peak output, offering exceptional fish detection capabilities. The X135 also supports Lowrance's exclusive Broadband Sounder technology, providing detailed images of the underwater environment. This feature helps users identify fish, structure, and thermoclines with remarkable precision.

The X125 model, while similar in design, offers a 5-inch display size. The device also features a dual-frequency sonar, allowing users to switch between 50 kHz for deep water and 200 kHz for shallow water, enhancing versatility for varying fishing conditions. Its integrated GPS allows for waypoint marking and route tracking, ensuring you can revisit those promising fishing spots effortlessly.

For those looking for advanced dual-frequency capabilities, the X136DF and X126DF models take things a step further. Both models feature a split-screen view, enabling users to monitor sonar and chartplotting simultaneously. The X136DF includes advanced navigation functionalities with an internal GPS antenna, which simplifies the installation process, while the X126DF may require an external antenna for GPS functionality.

These Lowrance models come equipped with various user-friendly features, such as customizable display settings, allowing users to tailor the information presented to their preferences. Both the X136DF and X126DF support multiple languages, catering to a global audience of boaters and fishermen.

Moreover, Lowrance devices incorporate innovative networking capabilities that allow for the interconnection of multiple devices onboard. With NMEA 2000 support, users can integrate radar, autopilot systems, and other electronics for a cohesive and efficient boating experience.

In conclusion, the Lowrance X135, X125, X136DF, and X126DF offer a fantastic mix of performance, user-friendly features, and advanced technology. Each device is designed to provide valuable insights for anglers and boaters, ensuring a successful day on the water. Whether you're a novice looking to enhance your fishing experience or a seasoned pro in search of the latest technology, these models represent a reliable choice.
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