DFF3D Loss of cross section and 3d history

[hpozzi]

Hi guys

I’m having some trouble with a dff3d setup with a b54 transducer connected to a tztouch 2. I was out fishing using the dff3d - primarily using the cross section and 3d history for bottom fishing. I usually fish around 60-100m deep but went out to 300m for some deep dropping. As I went deeper the cross section lost bottom signal as I had expected and continued to fish with my normal 1kw traditional sounder. Upon returning to the shallower reef I noticed the cross section was not showing any returns in depths it normally would.

The side scan still works perfectly and the triple beam shows bottom returns - however they seem a little weak.

The timing of the problem and the fact that half of the functions are still working is making me think it is a software issue however I have tried everything I can think of to get it working including adjusting every setting, several factory resets, cable reconnection and a new Ethernet cable, and I is still not showing a bottom return in any depth.

I am at the point where I suspect the transducer may be faulty but don’t have access to an airmar tester so seeing if anyone else has experienced this problem before I go and buy a new b54 blindly.

Thanks in advance

 

[jp498]

I would turn off autorange; maybe confused about the range?

Might need correction, but I think DFF3D was made for Tztouch3 rather than tztouch2 unless you have a BB version which is sort of between the two.

Might check grounding, and also turn off all unnecessary electronics and lights to make sure it's not receiving interference from something else misbehaving and causing dff3d problems.

If you do get a new B54, you can test it over the side before you hire the fiberglass work to install it.

 

[hpozzi]

I would turn off autorange; maybe confused about the range?

Might need correction, but I think DFF3D was made for Tztouch3 rather than tztouch2 unless you have a BB version which is sort of between the two.

Might check grounding, and also turn off all unnecessary electronics and lights to make sure it's not receiving interference from something else misbehaving and causing dff3d problems.

If you do get a new B54, you can test it over the side before you hire the fiberglass work to install it.

Thanks for the response jp498

Have played with the range and gain settings all manually try get it to work, as per the manual it it comparable with the tzt2 series.

i might power it up off a seperate circuit from anything else to exclude interference.

Cheers

 

[Titanic II]

Have you ever seen the unit work properly?
Also, go to the 3-beam view and see if you are painting good bottom on all 3 beams. The port/starboard beams max depth 650ft and the center beam 900ft.
If there as interference or noise you would see it as a repeating pattern on the screen in the 3-beam view.

 

[hpozzi]

Have you ever seen the unit work properly?
Also, go to the 3-beam view and see if you are painting good bottom on all 3 beams. The port/starboard beams max depth 650ft and the center beam 900ft.
If there as interference or noise you would see it as a repeating pattern on the screen in the 3-beam view

I had it working properly for several hours over a few trips. It was only once I went deeper on the most recent trip that the issues began. On the 3 beam I am getting returns however they don’t seem to be as solid as before. There doesn’t seem to be any interference, just nothing on the cross section

 

[Titanic II]

If you have not done this reset, try it. To go through every setting on the DFF3D would take a while, this will get it back to out of the box settings and we can go from there.

 

[hpozzi]

If you have not done this reset, try it. To go through every setting on the DFF3D would take a while, this will get it back to out of the box settings and we can go from there.

View attachment 5945

Hi titanic II

I have already performed this reset

Thanks