Does anyone know what the width of the beam is, in relation to the depth, for the mega down imaging that is built into the SI units transducer. I'm just curious I haven't seen it posted anywhere.
Does anyone know what the width of the beam is, in relation to the depth, for the mega down imaging that is built into the SI units transducer. I'm just curious I haven't seen it posted anywhere.
Matt I
2006 Triton 20xhp 225 Merc Pro XS
Solix 15 G1, Solix 12 G2, Helix 12 gen4 12 gen3 , Ultrex 112, Mega 360, Mega Live
I think there is a picture in the owners manual showing the beam width in degrees. Then some of that high school math is involved :-)
In 455 I always figure 1.5 times the depth for the non-mega di.
- Down Imaging: 45° at 1.2 MHz, 75° at 455 kH. I don't do math! Bob
- OK i did calculation(Be skeptical) 45° =.8 X depth and 75° = 1.5 X depth
Last edited by bobcoy; 05-24-2018 at 08:22 AM.
Thanks for the info. Just what I wanted.
But it isn't a 'cone'. It's more like holding a water balloon by the stem. You can google for images.
http://www.vexilar.com/blog/2014/08/...cer-beam-angle
Or other shapes:
http://www.raymarine.com/view/?id=197
An Imaging pulse is very thin (like inches) from front to back, and wide to the sides. Think CAT scan.
Wayne Purdum
Charlottesville, Va.
Helix 12 CHIRP MEGA+ SI G3N/G4N, Helix 15 CHIRP MEGA SI+ GPS G4N
SOLIX 12 SI/G3, Helix 8 CHIRP MEGA SI+ G4N, Ultrex 80/LINK, MEGA360,
MEGA LIVE, LIVE TL
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**Looking for the one that makes it all worthwhile**
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Units ..... 1197 (6.310) ...1198 (6.490) ... Helix 12 MSI G3N
Thanks for the clarification, guys. I was thinking 2D.
If I was feeling argumentative, I'd point out that the sound energy STILL isn't straight-edged like we may imagine, but I'm tired... :D