Humminbird Side Imaging Forums
Side Imaging Forums => 798c SI => Topic started by: johno r on June 22, 2010, 03:07:34 AM
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When i make recordings the images has a lot of interference in the water colum on the right , the left has some up high but i can live with that,a snap shot of the same sounding looks ok and the screen looks fine, in shallow water it is worce witch is most of my soundings but in 100ft of water it is not there , the screen seems to be brighter on the right sometimes . my transducer is on the right and lifting the motor makes no differance .it is on a 14ft tinny . i have tryed lowering the transducer to 2" below the bottom of the hull but no differance. any idears[attachment=1][attachment=2]
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some outher shots
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I have never seen the bottom look like that up the boyne river
we will have to go out to the dam and compare readings one day
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Actually they dont look all that bad. You might want to play with settings a bit. go thru your menus and tweek them a bit.
Make sure the transducer is level with the water top and not tilted.
Chuck
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Johno,
The first image has almost a ghost image effect in the water column which is very unusual. This was showing in the software, but did it do the same thing on your unit? Lets eleminate any issues by not including HumViewer. It may have some issues with the recordings but they display normal on your unit.
The other images you posted do not show this effect. If you have some snapshots that show the same thing, please post them.
Have you tried your head unit on someone else boat to see if it happens the same? If it does we know it is your unit and then we can try a couple different things.
Check all connections and make sure they are tight. Please describe your setup in detail so we know what components you have and whats connected to what.
You could try backdating the software on your unit the previous version and see if you have the same issues.
Robert
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I have the 798cx si only have gps conected running off its own battery no outher elect running of it . 14ft alloy flatish bottom boat . if i turn up sensitivity on the unit i get similur readings. posted snap with sensitivity of 11 and the higher you go the worse it gets.[attachment=1][attachment=2]
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johno,
Can you post some pictures of your transducer installation? Straight on and also from the side, close up and overall view. Make sure we can see across the transom and trim down your motor into normal position if possible.
Something that makes me wonder is the strong sonar return just to the left of the center line.
Robert
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Robert will get some photos .tryed lifting the motor out of the water and still the same readings
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pig 75 might be out on the weekend give me a call or drop up will show you where it is
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transducer picks at present position have had it higher with no differance to side image but very little reading of normal soner on the plain at 44kph where it is now get good soner at speed[attachment=1][attachment=2]
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woops[attachment=2][attachment=3]
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more snapshots[attachment=1][attachment=2]
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snapshot from simulation on unit[attachment=1][attachment=2]
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This is what i get up at the boyne river
[attachment=1]
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pig75
will you be around on the weekend would like to compare readings
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Yes i will be here