Topic: 455 kHz or 800 kHz...what is the difference?

[calli1]

Can anyone tell me on the Side Image Units what is the difference in the 455kHz and the 800 kHz ?

[keizerh]

455 greater distance
800 kHz better quality of picture

hendrik

[sonar2000]

455 has a beam 86 degrees wide.  this covers the top to the bottom.    the 800 has a beam of 55 degrees wide and covers more of bottom and less of the top.  As hendrik said.  a clearer picture. 

You can check the Humminbird sonar tutorial  at
 www.humminbird.com

also refer to this forum. 

http://forums.sideimagingsoft.com/index.php?board=8.0

you can also search this forum using the tab at the top right

Chuck

[reddog]

Is anyone successfully using the 800 khz for SI imaging?

Mine works great in 455, but when I switch to 800, its gets way too dark to read anything.

Ive tried adjusting the sens, but that doesnt help much.

[sonar2000]

Try the contrast and the brightness setting on the sonar menu.   Chuck