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+--- Thread: Lots of Noise (/showthread.php?tid=1039)
Lots of Noise - banksdd - 06-06-16 09:54 AM
hi, I have a cpt-120 connected to an A98. When i am fishing in shallow water where the cpt-120 can see the bottom the reading seems to be ok. I see the bottom and fish, ext. When i am fishing blue water, i.e depth of 3000 plus feet the screen has a lot of noise on it that looks like small dots everywhere. i am not interested in seeing the bottom but just the first 200 feet of the water column. I have attempted to use the noise and gain filters without any success. Is there something i need to be doing when i am fishing in deep water?
RE: Lots of Noise - Chuck - Raymarine - Moderator - 06-24-16 02:15 PM
Welcome to the Raymarine Forum Dan,
When fishing in water depths greater than 600' and/or the sounder is unable to acquire bottom, then the sounders filters will be adjusted to their greatest level of sensitivity to better improve the chance of getting a bottom return. When using the product under such conditions, it is recommended that
- the depth range be manually configured to the desired depth range within the first 600' of the water column
- the Noise Filter setting be switched from Auto to Manual and that the sensitivity be reduced to decrease the noise to an acceptable level
- the Gain and Color Gain settings be switched from Auto to Manual and that they be reduced to decrease the noise to an acceptable level