Side Scan on the DFF3D

D

Driftin2

New member
I have the DFF3D with the TZTouch2 screens and I'm very disappointed with the side scan bottom and structure discrimination. I've had the Garmin Side Scan and the picture was exponentially better. I could see port holes with it in some of the intact wrecks we worked over. The DFF3D just shows grades of color with almost zero discrimination. Am I doing something wrong???
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Driftin2,
The DFF3D really wasn't designed to be a high resolution side scan machine. Yes it has a side scan mode but at 165Khz it was intended for deeper water applications. Frequency equals resolution, so higher frequencies yield better details. The higher the frequency the narrower the transducers beam width becomes, also a plus. If we look at the units that are out there, you will find most of them are using frequencies between 400Khz to 1.2Mhz. The typical beam width from the 165Khz is around 10 degrees vs 1 or 2 degrees (400Khz).

In your screen shot a do see a little center channel noise so I would recheck how the module and transducer cable are grounded. You can also try using a Short 1 pulse length.

Snips
 
Thanks for the response. I do use it in 600 to 900 net depths in the Northeast Canyons but I don't see much of anything but the grey scale you see in my pictures. I don't see anything different even at greater depths so the Side Scan function is basically useless for anything other than Furuno's marketing. It allows Furuno to say it has Side Scan but it should say the resolution and structure discrimination will be useless. When I added the DFF3D (2018) I added it along with 3 TZ2 Touch screens, the Furuno 1150 and a Furuno 12 KW radar. I'll try the short 1 pulse but from what you've said I shouldn't expect the DFF3D to work as good as the Garmin and Simrad Side Scan units. I wish I had known that before I bought and installed the unit as I also have the Furuno 1150 bottom machine which works great. I bought the DFF3D thinking it would be similar to the Garmin and Simrad units that were available and had I known it wouldn't work like those units, I would have installed one of them with the higher resolution side scans to do what I'm looking for. The DFF3D basically is useless to me as it doesn't do what is expected from a side scan. I'm very disappointed in Furuno and as a long time customer, this deceptive marketing may influence future purchases. Can I get a refund for deceptive marketing??
 
Driftin2,
Point taken, the terminology Side Scaning and Side Scan are very close.
That said, the DFF3D does a pretty good job in being able to display targets off to the side.
So lets see what we can do to improve your situation. You mentioned that you have a FCV-1150 so would it be possible to send me a screen shot like below. I would like to see how the DFF3D and the 1150 are displaying the same targets.

Snips
 

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As you know they are separate units but I'll do the best I can to get the 2 screens into one photo so you can see what's going on simultaneously below.
 
I will be offshore in 600 foot plus depths this weekend but I know from prior trips I won't see much of anything other than the Grey Scale I see in shallower depths in these picture I included. The bottom discrimination is just horrible and I'm very disappointed as it is basically a useless module and transducer package I wouldn't have bought had I known what I know now.
 
Driftin2,
Sorry I was away for a couple of days.
What I was looking for in asking for the comparison was how the DFF3D was displaying targets when using the triple beam mode instead of the side scan to your 1150. Would it be possible when you are out next could you take a couple of screen shots for me?

Snips
 
Snips":8502m5ee said:
Driftin2,
Point taken, the terminology Side Scaning and Side Scan are very close.
That said, the DFF3D does a pretty good job in being able to display targets off to the side.
So lets see what we can do to improve your situation. You mentioned that you have a FCV-1150 so would it be possible to send me a screen shot like below. I would like to see how the DFF3D and the 1150 are displaying the same targets.

Snips
Click to expand...

Why i am never able to see such clarity on my TZT2 and DFF3D can you send a screen shot of all the settings u used for us to try and follow please?
 
Driftin2,
Thank you for your screen shots. A couple of things I noticed when looking at them.
The first is that the 1150 transducer looks to be over 2.5ft deeper in the water than the transducer for the 3D. I am curious what transducer are you using and how is it mounted? The second thing I noticed is the depth range on the 1150 vs the 3D. Even if the two sounders were set on the same range the 3D will have a slower TX Rate because it is looking off to the side. In your screen shots it looks like the 1150 is set to half the range of the 3D, setting the range like this is going to compress all the returns on the 3D even more because of the slower TX Rate. If you look back at the comparison picture of the 3D vs the GP-1971 I posted you can see how the TX Rate affects how the returns will be displayed when set at the same range.

Snips
 
I'm not sure if everybody is on vacation, I just got forgotten or the answer to my problem with the way the DFF-3D Side Scan is advertised and actually works is so disappointing and you're hoping I go away. I'm adding some more of the combination pictures with the triple beam and the FCV1150 in the same pics as you requested. I'm not sure why you wanted these as the issue is with the Side Scan.

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dJ%25ve+b8RISavOYIJT5xtQ.jpg

I93MEYmeQ46NTUokFRONBw.jpg
 
Driftin2,
Thanks for the screen shots, looks like process. The screen advance now looks to be very close but I am curious why the FCV-1150 is at a screen advance rate of 2/1 in that shallow of water? Are you using the Short 1 PL with a TX rate set at 20? I am also seeing that the DFF3D is picking up a little interference from the 1150, what you you have the DFF3D IR filter set to?

Snips
 
Driftin2,
Are these the type of SS images you are looking for?

Snips
 

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Dear Snips,

what settings are u using in the last post as your screen resolution seems way better than what i get on my DFF-3D????? specially on the triple beam.....
 
Snips":brcfgoky said:
Driftin2,
Point taken, the terminology Side Scaning and Side Scan are very close.
That said, the DFF3D does a pretty good job in being able to display targets off to the side.
So lets see what we can do to improve your situation. You mentioned that you have a FCV-1150 so would it be possible to send me a screen shot like below. I would like to see how the DFF3D and the 1150 are displaying the same targets.

Snips
Click to expand...

can you also be kind enough and let me know all the settings you used to obtain such resolution please?????????
 
Try setting the Multi-sounder TVG to 9 and the STC to 0.

Snips
 
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