Thread: MEGA IMAGING

Originally Posted by kosmo

I'm curious also. From the pictires that I'm seeing on internet.Scanning different frequencies doesn't seem like it's making any difference. Just seems to me that,DSP,better processor,with the ability to send more energy out into the water along with higher frequencies is what's making the difference. Fixed or scanning same results. (Anyone got any thoughts on this)

1200kHz vs 800kHz should show increased detail as similar to 800kHz vs 455kHz ...

CHIRP in itself will help with signal to noise ratio of the returning sound pulse ... this lower noise ratio allows more energy to be put into the water ... which will collect more data (detail) - with less noise - at increased range ...

The Mega SI is advertised at 125ft ... this would indicate the 1200kHz CHIRP sweep frequency to get that much range with that high a frequency ...



I would venture to guess fixed frequency 1200kHz might have an effective SI Range of 60-90ft ... I'm sure we will eventually see images at 1200kHz fixed if these Mega units allow adjusting the sweep to a single frequency like the present HELIX 12 CHIRP or ONIX CHIRP ...

And of course new processing will help all the factors involved ...

Rickie