Topic: AS SIDB Y Cable Question

[RedHawks22]

Hi Everybody,

I'm new here and new to Humminbird so please bear with me. I have a 998c HDSI unit at the helm of my 2007 Skeeter iClass. I have an AS SIDB Y Cable to split my side imaging transcuder which is mounted on my jack plate and a 2D Transducer. However, I do not have the 2D Transducer plugged into the Y cable yet as I haven't received it.

I took the boat out this past weekend for its first voyage this year and the Side Imaging and Down Imaging weren't very clear at all. The readout showed a depth of 1500-2000 feet on both the side imaging and the down imaging. I could set the lower limit to the depth I operating in and "see" the bottom but I believe because the unit thought I was much deeper, it wasn't spitting back the returns appropriately. I couldn't see much of anything.

I experimented with different speeds (1MPH-6MPH) matching my chart speed to boat speed. I used all the recommended settings. I am confident my settings are correct. I also noticed that when I attempt to switch on "contour mode," the water column doesn't go away (which again leads me to believe that the unit or transducer is thinking it is much deeper than it actually is). Also, I was the only one on the lake so there was no interference between units.

So my questions are as follows:

1. Could this be from only having the SI/DI transducer plugged into the  as sidb y cable with nothing plugged into the 2D receptor?

2. Could it be interference? I ordered an extension for my jack plate bracket just to be safe. I will test that this weekend as well. It really appears to me that there is nothing obstructing the view but I figured I'd ask the question anyway. Has anyone else had any interference issues mounting the SI transducer on the jackplate (slidemaster) '07 iClass?

I have another 998 on the bow. I am going to switch the units this weekend to see if the problem still persists. I was just wondering if anyone had any other thoughts I could test going into this weekend. I did not take any snapshots my first time out but will be sure to do so next time.

Thanks,
Sean

[Humminbird_Greg]

Welcome to the Humminbird Side Imaging Forums RedHawks22.

It all sounds like it is from not having a 2D sonar signal.  Try taking the AS-Si-DB-Y cable out and see if the Si and Di sonar work better for you.  Without the 2D transducer connected to the AS-Si-DB-Y cable, the unit is not connected to a water depth source for its sonar.  Without that not many sonar related things work correctly.

[RedHawks22]

Greg,

Thank you for your response. I assumed this was the issue. Hopefully, I will be able to report back with positive results after this weekend.

Thanks!
Sean

[RedHawks22]

I just wanted to report an update to this thread. After plugging in the Shoot-through-the-Hull transudcer, my side imaging worked perfectly. Thank you for your help.