Single Freq Colour vs Dual Freq B/W
- Thread starter Chop
- Start date
benniejordaan
Sealiner
This is how I understand it.
Very dificult to explain but here goes.
Duel frequency works at sa 50 Hz and say 200Hz. Say you are sounding in deep water 50Hz is better as it is able to penetrate deeper, however you loose clarity. And 200 Hz will work well in shalower water and the clarity is good. For most of us Ski boaters, we prefer duel frequency so we can sound at deeper depths but have the clarity when fishing in 50-100m of water.
Why this works is very difficult to explain in writing.
I'll try to make a sketch and post it.
B
Very dificult to explain but here goes.
Duel frequency works at sa 50 Hz and say 200Hz. Say you are sounding in deep water 50Hz is better as it is able to penetrate deeper, however you loose clarity. And 200 Hz will work well in shalower water and the clarity is good. For most of us Ski boaters, we prefer duel frequency so we can sound at deeper depths but have the clarity when fishing in 50-100m of water.
Why this works is very difficult to explain in writing.
I'll try to make a sketch and post it.
B
benniejordaan
Sealiner
Look at the diagram. There is a structure and you are sounding with either 200 or 50 Hz. Every time the wave makes contact with the structure is sends a signal back. As it makes more contact in more places, the picture is clearer. Both are at say 2000Watts. The higher this goes the longer the actual wave length. As the 200 Hz waves "zig-zags" more, it does not penetrate the water columne as deep because it loosed power.
For example, I have a duel frequency unit 2400watts at 50 and 200 Hz. This is good for sounding and seeing good quality images upto about 100m deep but I can sount without the same clarity in 300m of water. If you never fish in water deeper than 100m you would only need a high powered unit that produces 200 Hz. Salt also effects its ability to penetrate.
Does that help? Sure some one will add or correct me somewhere.
For example, I have a duel frequency unit 2400watts at 50 and 200 Hz. This is good for sounding and seeing good quality images upto about 100m deep but I can sount without the same clarity in 300m of water. If you never fish in water deeper than 100m you would only need a high powered unit that produces 200 Hz. Salt also effects its ability to penetrate.
Does that help? Sure some one will add or correct me somewhere.
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benniejordaan
Sealiner
Colour or B&W. Colour will give you more information regarding what you looking at. Different colourlines will show you different densities as well as where structure is beneath you. I wish some one could draw a nice 3D sketch to show this!