Author Topic: 987c vs 998c ... differences?  (Read 1592 times)

0 Members and 1 Guest are viewing this topic.

Offline capttater

  • Newbie
  • *
  • Joined: Aug 2014
  • Location: Jupiter FL
  • Posts: 2
  • Unit(s): 998c si
987c vs 998c ... differences?
« on: August 29, 2014, 12:12:02 PM »
Hey guys, I was one of the very early (first month) users of the sideimaging with the 987c. I left it with my last boat I sold and the new one had Raymarine but I bought a 998c SI to put on it.
I just can't get the same picture quality. I know the 987c was a 1KW transducer and they added DI over time and such. I could see clear bottom out to 2000' of water.
The 998c I turned off all the sharpening and such and go the SI view good but the down imaging is a mess and color view is like made from legos.
OLD











This is the new one.. BEST I can get.. I'll go pull my SD card but it's just sometimes good, sometimes horrible. I try all sorts of frequency for side and down and my raymarine shows stuff the humminbird never sees.  Used to be the other way.


of course about 600' is all I can get but I understand the lower power.


Offline Humminbird_Greg

  • Humminbird Helper
  • Humminbird Staff
  • *
  • Joined: Mar 2009
  • Location: Eufaula, AL.
  • Posts: 6546
  • I help because I can
    • Humminbird Web Site
Re: 987c vs 998c ... differences?
« Reply #1 on: September 09, 2014, 09:22:44 AM »
Welcome to the Humminbird Side Imaging Forums capttater.

On the 987 unit were you viewing the 200kHz sonar, the 50kHz sonar or a combination of both?
What 2D frequency 9or frequencies) are you using on the 998 unit?
From the cell phone picture you posted, it looks like there is a lot of interference in the 2D sonar.  Was the Raymarine unit on at the same time?
Does the 2D sonar always show those vertical lines?
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline capttater

  • Newbie
  • *
  • Joined: Aug 2014
  • Location: Jupiter FL
  • Posts: 2
  • Unit(s): 998c si
Re: 987c vs 998c ... differences?
« Reply #2 on: September 11, 2014, 08:55:20 AM »
I've tried it with the raymarine off and on.. The raymarine has a big 2kw transducer but it doesn't seem to interfere. The only thing near it electrically is a VHF which is about 2' away as well. The HB is in the electronics box while the raymarine down below. The do share a cable run but to the transducers but again off or on with the raymarine makes no difference.


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo

 

Related Topics

  Subject / Started by Replies Last post
3 Replies
7397 Views
Last post December 06, 2010, 06:28:20 PM
by Foster78
1 Replies
2422 Views
Last post July 14, 2011, 10:54:25 AM
by Humminbird_Greg
19 Replies
9126 Views
Last post July 30, 2012, 04:23:24 PM
by Humminbird_Greg
1 Replies
2260 Views
Last post August 20, 2013, 03:10:52 PM
by Humminbird_Greg
12 Replies
7479 Views
Last post June 02, 2014, 08:51:55 AM
by ropesfish
15 Replies
7767 Views
Last post March 25, 2014, 10:54:20 PM
by newkid4si
17 Replies
8573 Views
Last post April 14, 2016, 04:48:43 PM
by sonar2000
4 Replies
1338 Views
Last post May 05, 2019, 09:40:56 PM
by Delta Bass Fool


anything
SimplePortal 2.3.3 © 2008-2010, SimplePortal