DFF-3D Settings

[Quitsa]

Can you give me some more guidance on what happens when changing the beam angle and beam width settings on the DFF-3D? It's not really all that clear from the manual and I am trying to figure out what settings to use for different purposes. For example, when trolling and I want to see fish off to the sides or when bottom fishing and I want to get a picture of a much bigger swath of bottom than my B175H shows on the regular sounder. Same question for the TX Pulse options. I can't figure out what setting to use under which conditions.

have a B54 transducer mounted right on the keel.

Thanks.

 

[Snips]

Quitsa,
Use 40/40/40 for surface or mid water fishing and 20/20/20 for fish closer to the bottom.

Snips

 

[DeepSouthTX]

Snips, for us nerds out here. I saw your reply and you just reinforced what makes sense intuitively. I noticed that these variables are only adjustable under triple beam mode. Does adjusting these settings in that mode affect the other 2 modes? The manual makes a statement under the cross section mode stating that is is 120 degrees. And nothing under that mode about adjustment. Also if I remember right you could set both beam angle and width independently. Under what fishing circumstances would you want your beam angle to be different than your beam width? Why are those even adjustable independently? Just going over it in my head if you were to set your beam width to 40 with a beam angle of only 20 for instance would you not have a bunch of overlap on the returns? And vice versa. Thank you

 

[Snips]

DeepSouth TX,
The beam width/angle in the single/triple beam mode are independent and do not effect the cross sectional view which is always 120 degrees. As you probably have seen, having the beam side by side sometimes can blend targets in the two beam together. If you have a gap between the beams it can give more port/mid stbd target separation.

Snips

 

[DeepSouthTX]

10-4 -- Thanks for the reply .

 

[maxima]

Snips:- I install the TM54 on the starboard side and have issues with the 120 degree beam of DDF-3D scan cutting into the engine path, as no matter how I position the TM54, the 120 degree beam will have a coverage that hits the propeller somehow due to design of the oat transom. B54/SS54 is not an option as I've a 24ft boat that at times I need to run shallow and all the way up to 300ft. I've not play around with the beam width, just launch to water after installing.

In simple words, how to change the DDF-3D TM54 beam width from 120 degree to 60 degree? Does reducing the beam width from 40/40/40 to 20/20/20 narrow down the beam cone? 40/40/40 = 120 degree beam? 20/20/20 = 60 degree beam?

Any Help Much Appreciated.