HB 999 helm/ HB 859 bow set up

[bdmilam84]

Hi All,

Recently got a 859 that i will be setting up at the bow on the TM. Current SIHD ducer is located on the back of boat by motor. My concern is crosstalk (CT). I will not be linking these together so I just want to know whats the best way for me to avoid CT? should i only use sonar on the 999 at helm while I'm driving/ then turn off? will i be fine with both on as normal?

Also looking for what the best Ram mount i should use upfront? All opinions are appreciated.

TD for 859 is XNT 9 DI T
TD for 999 is XHS 9 HDSI 180 T

PLease advise.
-Ben

[Wayne P.]

The DI unit uses 200/455 kHz for 2D sonar and 455/800 kHz for Down Imaging.

The SI unit uses 83/200 kHz for 2D sonar and 455/800 kHz for Side Imaging and Down Imaging. You cannot use 83 kHz by itself, 200 kHz operates all the time for the depth readout whether you choose to display 200 kHz 2D or not.

When the water is deep enough for the sonar pulses to overlap, they will cross-talk. The simplest way to prevent that is to set the unit you are not viewing to Sonar OFF. That way you don't have to wait for a start-up if you turn the unit off.

[bdmilam84]

what bow mount d you recommend Wayne? for the 859? I am not in rough water hardly at all.

[Wayne P.]

what bow mount d you recommend Wayne? for the 859? I am not in rough water hardly at all.

https://www.rammount.com/part/RAM-109HU

https://www.rammount.com/part/RAM-D-111U

[bdmilam84]

is there a difference in the RAM-109HU and RAM-109H
?
-Ben

[Wayne P.]

is there a difference in the RAM-109HU and RAM-109H
?
-Ben

They are the same. I think the U has something to do with packaging either with or without.

[bdmilam84]

Hey Wayne, with using the XNT-9-DI-T with a transducer shield and savor, will this help eliminate interference from the TM while using the TM?
-Ben

[Wayne P.]

Hey Wayne, with using the XNT-9-DI-T with a transducer shield and savor, will this help eliminate interference from the TM while using the TM?
-Ben

No

[bdmilam84]

im guessing 2D will also have interference?

[bdmilam84]

Also, Wayne. to bypass this interference issue, could i just link the 859 to my 999 at the helm and not even run a ducer on the TM at this time? If yes, what would i need?

Thanks, for all your knowledge on this.

[Wayne P.]

im guessing 2D will also have interference?

A DI unit with default frequencies has 200 kHz, 455 kHz, and 800 kHz. If the trolling motor is broadcasting on any or all of those frequencies you will have RFI. It is not a sure thing. You won't know if you will have RFI until you do the installation and use the unit on the water. Every single installation is different.
There are measures you can use to defeat it, but you can't do any ahead of time other than best practices for installation.

Someone posted recently where RFI was an issue and the console unit and bow unit were switched and that fixed it.

At a minimum, start with the correct parts for the application.

[bdmilam84]

in theory? could i use the 859 as GPS, and networked with only the 999 ducer on the transom ?

[Wayne P.]

in theory? could i use the 859 as GPS, and networked with only the 999 ducer on the transom ?

Yes, if you have newer software than the original.

Takes an AS EC QDE Ethernet adapter each and an Ethernet cable.

[bdmilam84]

i believe the 859 is version 6.83

[sfw1960]

They are the same. I think the U has something to do with packaging either with or without.

That's correct - one's OEM poly bag & the other is retail pack.

Ben why don't you just pony up for 2 QDE's & a 15' -20' cable, get them both on current S/W - and explore the possibilities?

It's way better IMO.

If you ran the 859DI @ 4552D and 800 DI you would have far, far less cross talk than any other stand alone scenario.

My 859DI's 200 kHz is often networked to the H12MSI's 2D via Ethernet = no cross talk.

I mainly use 2D for depth and imaging for target acquisition, though that might change with the H10MDI Wide Band Chirp when this WX decides to go one way or the other besides blowin' & gloppy crud!.

[bdmilam84]

SFW (robert) I have read horror stories about upgrading to new software for these units. Otherwise i would def. do this. If i upgrade, and link to gather would i still need to connect the 859 ducer to the TM? I have been researching about RFI with the tear drop ducer, even with a ducer shield and savor.

Thanks for all the tips guys. keep them coming.

I will doing the work on this at the end of the month and will update this post once i get installed and on water.

[bdmilam84]

The DI unit uses 200/455 kHz for 2D sonar and 455/800 kHz for Down Imaging.

The SI unit uses 83/200 kHz for 2D sonar and 455/800 kHz for Side Imaging and Down Imaging. You cannot use 83 kHz by itself, 200 kHz operates all the time for the depth readout whether you choose to display 200 kHz 2D or not.

When the water is deep enough for the sonar pulses to overlap, they will cross-talk. The simplest way to prevent that is to set the unit you are not viewing to Sonar OFF. That way you don't have to wait for a start-up if you turn the unit off.

Hey Wayne,

If i turn sonar off on my 999, will side image still work?

[Wayne P.]

Hey Wayne,

If i turn sonar off on my 999, will side image still work?

Side Imaging has to be processed by a unit that has Side Imaging to be shared. If you turn off the Side Imaging unit, there won't be any SI to share to your DI unit.

[sfw1960]

Yep.

So if you turn Sonar OFF on the 859 you can view SI and the composite DI from the 999.

Now you're starting to better understand why Wayne & I run SI on both ends of our crafts.


Having a Mega SI unit is just more icing on the cake for sharing.

[bdmilam84]

Side Imaging has to be processed by a unit that has Side Imaging to be shared. If you turn off the Side Imaging unit, there won't be any SI to share to your DI unit.

Sorry, I wasn't clear. I'm not linking the units together as of now. I'm asking if i turn sonar off on the 999, does that include SI. im trying to avoid Cross-talk with two transducers, as best i can.