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[TG] [TG11] Axiom/RV-100 - Unclear image
07-06-18, 01:45 PM (This post was last modified: 07-24-18 08:22 AM by Chuck - Raymarine - Moderator.)
Post: #1
[TG11] Axiom/RV-100 - Unclear image
Hello,

I recently installed an Axiom 9 with the RV-100 transom mounted xducer.

I have been disappointed with the clarity of the down, side, and 3d, but realize something else must be amiss. I have searched google and these boards quite a bit, and have found meaningful information but none has applied to my scenario 100%.

This is all on an aluminum mod-V hull, 16.5' boat.
-The xducer is on a transom saver plate, so relocating it is no big deal.
-The xducer cable was run up the Sboard side gunwale with the steering and other wiring.
-The power source came from under the console, and was where the old fish finder was connected (A Garmin Striker 4, which experienced no noise or issues). This may be a common binding point.

Issues experienced thus far:
-I lose bottom after 12kts and read -.-. I realize this can be expected from these units. I was losing bottom and had a rather large rooster tail, so I remounted it higher. I now can read to a slightly higher speed, but still lose bottom--I still have a small splash/rooster tail. Is it not supposed to have any at all? Can you lose bottom if the xducer is too deep?
-Noise/bubbles (blue spheres on depth setting) or something on 3d scan. Shows a ton of them and then all of the sudden it simply goes away and reads 'normal'. This can appear or disappear randomly.
-I have seen some vertical spikes on the downscan which are shown as horizontal lines on the sidescan. I saw this when I revved the motor in neutral, but could not discern if it was electrical noise or vibrations (but do not think they're bubbles because they reach from surface to bottom).
-I have had the MFD hiccup on me with a large vertical mark on the scan and then it starts to read clean (maybe it discharged static?).
-My 3D scan at times appears that I am in a constant valley. The walls form upward, when there are no walls. If I pass over the tall wall, it goes away after it generates the surface, but this can freak you out when navigating.

I have attached some pics of the xducer mounting, and will attach screen shots of some of the issues later this afternoon.

I will be running separate dedicated power to the unit today to see if that's the culprit. I will also verify to make sure the xducer cable isn't wound around anything on its routing.

Thanks for any help in advance,
Ian
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[TG11] Axiom/RV-100 - Unclear image - neegra - 07-06-18 01:45 PM

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