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on a 998 what is the differance in the 800 and 455 for side imaging? which should i use? also what should i use for for DI and regular 2D. I thought i read somewhere that one is good in real shallow water while the other is for 5ft. or deeper water on the 800 vs. 455 thing? idk thanks for any help
Below are the HB depictions for the 455kHz SI sonar beam vs the 800kHz SI sonar beam...
The lower the frequency number, the deeper the sonar beam can be used..but with less detail
The higher the frequency number, the more detail the image will produce...
Now, deeper is a relative term...as there as several things in the sonar world that can affect the effectiveness of the sonar beam...
Water depth, water clarity/water borne particles, bottom composition...are things that can absorb the sonar beam...(deeper water is going to absorb more sonar than shallower water - giving a darker image.... a hard rock bottom is going to reflect sonar better than a soft mud bottom - giving a brighter image...etc...)
I find myself using the higher detail 800kHz SI beam most often except when water conditions just will not let me get enough brightness into the SI image with the highest "20 SI Sensitivity" setting of the 800kHz SI beam...
Attachment 293508
Rickie
Now the DI and 2d...
In the HB "DI from SI" (like your SI series Unit)..I don't use DI very often but when I do...I use the Wide setting on the DI to cover a wider area of bottom....
2d...I use the 83/200 blended setting to cover more bottom with the 83kHz sonar cone (the 83 is a 60° cone) "and" get the better detail of the 200kHz sonar cone (the 200 is a 20° cone)...
I use "Switchfire On" for water deeper than 10 ft...and adjust the Sensitivity to an acceptable clutter level...
I turn "Switchfire Off" for water shallower than 10 ft....and adjust the Sensitivity to an acceptable clutter level...
(Switchfire On will really make the brush "pop" out on the screen, but it also shows clutter very readily which can make the image hard to distinguish at times...)
Rickie
Rickie I never knew there was a wide setting, how do you get to it in the menu?
I have had this discussion many times on here. I fish water levels from 7-25 ft most of the time and the 800 works fine for me. Also I run the 200 only beam on 2d because generally if it shows up on the 200 it will show up on the di at 800. Also the setting you are looking for is when you double click the menu button and go to sonar settings I believe
2003 Xpress X17
MinnKota V2 Powerdrive
Humminbird 998c
Cumberland Crappie Racks
BnM PSTs
Here are a few screenshots I did a while back
Attachment 108850Attachment 108851Attachment 108852Attachment 108853
That looks like 800 on the right to me bill. Or the sensitivity/contrast is adjusted way different between the 2
2003 Xpress X17
MinnKota V2 Powerdrive
Humminbird 998c
Cumberland Crappie Racks
BnM PSTs
Could b the difference between units. I don't know. I could never get pics like that on do at 455 just dots and so forth
2003 Xpress X17
MinnKota V2 Powerdrive
Humminbird 998c
Cumberland Crappie Racks
BnM PSTs
On Bills shots the 455 looks like its got more detail than the 800
Here is some in 800
Attachment 108861Attachment 108862Attachment 108863
In a HB SI series unit...Quote:
Originally Posted by wilbur
"Menu" "Menu"
Cursor over to "Sonar" tab
Cursor down to "Down Imaging Beam Width"
There are 3 DI beam width settings...."Narrow", "Medium", " Wide"... (Default is "Wide")
I still have not gotten a really good explanation of what these settings actually mean except that "Medium" has a wider coverage angle than "Narrow"... And "Wide" has a wider coverage angle than "Medium"...
Rickie
(I'm not sure about Bill's settings but)...Quote:
Originally Posted by wilbur
In my 1197...I have generally found that the 455 will be brighter than the 800 "at the same sensitivity setting"...which sometimes can give the image the conception that the "brighter" 455 setting looks better...
When I raise the 800 sensitivity setting to get the same image "Brightness" .. The 800 is noticably crisper...
This is reason again to constantly adjust the HB Sensitivity setting to get the best eye appealing image at any given point or circumstance...
Rickie
I'm pretty sure everything is default. I'm still learning the unit but due to physical problems I haven't been able to get out much.
wilbur your sensitivity is too high (noted by the way bright white):twocents
Thanks for the comparison images between 800 and 455. I was just doing the same thing today with my HDS7 on the lake. i settled on the 455 in apx 10-14 ft of water.Quote:
Originally Posted by Barnacle Bill
im not sure of how to describe the difference in the two(455/800). ive been using humminbird si/di for a few years now and for me, ive decided to just keep my unit on 455. the pictures that im showing on this post are all 455. using a humminbird 998. ill dig up some pictures using the 800 and post them next.(the 2d is 200khz) http://i826.photobucket.com/albums/z...psa42f4cc7.pnghttp://i826.photobucket.com/albums/z...ps6d81af10.pnghttp://i826.photobucket.com/albums/z...ps5e914753.pnghttp://i826.photobucket.com/albums/z...ps585f4549.pnghttp://i826.photobucket.com/albums/z...ps82c776ea.pngQuote:
Originally Posted by LY34
sorry i cant find very many 800khz pictures.ive took a bunch of them just dont no were there at.but any how heres two of them.http://i826.photobucket.com/albums/z...012/S00365.pnghttp://i826.photobucket.com/albums/z...012/S00350.png (crappie girl seen some of them) hello crappie girl.....
Maybe I need to give my 455 a shot again. And see which one I prefer. Maybe the image wasnt as clear as it should be due to the fact my unit wasnt as dialed in as it needs to be
2003 Xpress X17
MinnKota V2 Powerdrive
Humminbird 998c
Cumberland Crappie Racks
BnM PSTs
I have a helix 7 that only has 455. I cant get it dialed in like i want to get the picture crisp in any form. Ant tips for settings in 5 to 15 ft of water?
*Start with Restore Defaults ...
*SI Range 2-3times water depth ...
*Chart Speed matched to boat speed ...
*Change SI Sensitivity frequently to adjust SI brightness ...
*SI Contrast 10-12 (bump it up when looking specifically for fish) ...
*Choose a pallete color for ambient lighting conditions - sunny days will require a brighter pallete choice ...
Can you post some screenshots ...?
Rickie
For me personally what ever screen I am using 2D side etc my sensitivity is always up and I am constantly changing as depth and conditions change. I never look at structure I am only looking for fish as I do not care what is down there if there are no fish so all my adjustments are to enhance fish. I run a faster scroll speed which helps me pick fish out as they will take up more pixels which show better on my screen 99% of the time I am using a blue screen in side imaging as fish show up white which for me is the highest contrasting colors.