surface clutter, and increasing the STC strenght until the image on the screen cleans up. Please note that in very shallow waters it is usually better to switch to manual gain mode to reduce gain fluctuation due to rapidly changing bottom conditions. 2) Using Surface Declutter, increase the Surface Declutter value until the surface declutter disappears completely.
7.11WHY DO I NEVER SEE FISHES IN THE RANGE BETWEEN 0 TO 2 FEET?
The minimum range of the Fish Finder is 2 Feet. In this interval the Fish Finder can detect neither the bottom nor any target.
7.12HOW CAN I REDUCE THE SURFACE CLUTTER?
You can act by: properly setting the STC as described at 7.10 and also by increasing the NOISE LEVEL and reducing the GAIN or the GAIN OFFSET (if you are in auto gain mode). However please note that a strong attenuation of surface clutter may also reduce the capability to detect targets.
7.13THE FISH FINDER IS IN AUTO GAIN MODE BUT THE PIC- TURE DISPLAY TOO MANY SMALL TARGETS, WHAT SHALL I DO TO REDUCE THE SCREEN CLUTTER?
Try increasing the NOISE LEVEL or decreasing the GAIN OFFSET.
7.14IN VERY SHALLOW WATERS WHEN THE AUTO GAIN MODE IS SELECTED THERE ARE FLUCTUATIONS IN THE BOTTOM PROFILE WIDTH AND ITS COLOR REPRESENTATION. WHAT SHOULD I DO?
In very shallow waters the environment situation (bottom/water condition) change very quickly thus causing the auto gain algorithm to create oscillations while trying to set optimal GAIN value for each situation. To avoid this it is advisable to switch to MANUAL GAIN mode and fine tune the GAIN to a fixed setting.
7.15IN VERY DEEP WATERS EVEN SETTING THE GAIN TO ITS MAXIMUM VALUE I CANNOT SEE THE BOTTOM WHAT SHALL I DO?
Try decreasing the NOISE LEVEL. If still the bottom is not visible there is nothing you can do, the bottom echo is simply too weak to be detected.
7.16GPS CHART PLOTTER SHOWS NO DATA WHEN VIEWING THE FISH FINDER PAGE
This may be due to the FF520 having an issue. To confirm, listen to the depth transducer for the transmit pulse. If the pulse is not heard the FF520 is defective.
Page 42 |
| FF520 |
|
