Humminbird Side Imaging Forums

General => General Discussion => Topic started by: daylward on July 30, 2021, 01:48:06 PM

Title: trying to nail down beam angle
Post by: daylward on July 30, 2021, 01:48:06 PM
I need to know what the beam angle is for our Solix 10 transducer operating at 455 kHz. I've looked at the manual but I'm having a hard time interpreting the diagram. Any help would be great. thanks
Title: Re: trying to nail down beam angle
Post by: rnvinc on July 30, 2021, 08:59:35 PM
455kHz is 2 beams (a left and a right) at 86° each and measured at -10db each  ...

It’s important to understand that the sound pulse travels past the 86° measured angle  ... and diminishes in strength continuously. So in actuality each beam (left and right) covers from the water’s surface to past vertical under the boat (this is why a target directly under the boat can sometimes be seen in both the left and right SI)  ...

(https://lh3.googleusercontent.com/nF6liFxaz0WaJJ-Y7-ZUeQt3qn55Kjmnwwq9_YhF8nYZjvhcpnnbwFJ-pt_-bsHKJX2qDwYs7n0z3vTuCMgHM8oUXw57sUPvPCRWohl7Sz4Rsy2V3LzazlsbUA_dCD_wkZRZJU_XX9o=w800-h400)

And it’s also important to understand that there is no “industry standard” of what -db measurement is used  ...

Some brands measure at -3db (half of the sound pulse strength)  ...

HB measures at -10db (I think this is 1/3 of the sound pulse strength)  ...

Rickie
SimplePortal 2.3.3 © 2008-2010, SimplePortal