Thread: 200/455 khz

I might be guessing here .... but, I was under the impression that 200kHz is a 2d sonar ping and 455kHz is a DI sonar ping. I wouldn't think a 2d processor could even interpret a 455kHz signal, or a DI interpret a 200kHz signal.

From what I've read about this unit ... the 2d imaging is done with a dual beam 83/200kHz signal ... and the DI is done with a 455kHz signal. It is capable of split screen images, either the two 2d signals or the 2d & DI signals. What I don't understand is how you can choose the 455kHz signal for the 2d imaging ..... shouldn't the kHz signal automatically relate to whichever imaging view (2d or DI) that you choose ??

... cp

That one got me too crappiepappy. would also see it as not being able to interpret the signal coming in unless it was compatible to that screen you were using.

The HB dedicated DI units do not use the "usual" 83kHz/200kHz frequencies for 2d...(unless it's a 800/900/1100 series DI unit and the "Transducer Select" menu is set to 83kHz/200kHz...and a compatible XTM 9 WIDE DI 20 T is attached)...

The smaller HB DI units only have the options of the beams below..



toofus...are you talking about changing the "Beam Select" menu from 200kHz to 455kHz...??

Or are you talking about changing the "Digital Depth Source" menu from the DI beam to the 2d beam...??

I think both of these settings should be under the Sonar tab...

Rickie

Its giving me a beam select option of 455 along with a di beam option of 455 or 800. My units came with the XNT 9 20 DI T. No WIDE listed in the pn. I was thinking the same thing on the fact there should be an 83khz option but there is not
I will be on the water all day today and I will snap a pic of the screen to post.

Originally Posted by toofuss

Its giving me a beam select option of 455 along with a di beam option of 455 or 800. My units came with the XNT 9 20 DI T. No WIDE listed in the pn. I was thinking the same thing on the fact there should be an 83khz option but there is not
I will be on the water all day today and I will snap a pic of the screen to post.

Your 500 series DI unit will not have the option of the 83kHz in any configuration...nor will it have the option of using the XTM 9 WIDE DI 20 T (these options are only available on the larger HB DI units)...
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Your "Beam Select" menu will control which of the 2d beams is displayed on the unit...:
*200kHz setting should display the returns in the 28° 2d beam
*455kHz setting should display the returns in the 16° 2d beam

Is the above 455kHz 2d "Beam Select" setting the issue you mention that causes the 455kHz view to be blank...??

Are you referring to the Sonar Zoom view that shows a split view of the chosen 2d beam and it's zoomed twin in the same view...and 1 of these panes in the split is blank...?? (There are settings in this Sonar Zoom split view that could cause that pane to be blank)...

Rickie

If I flip to 455 I loose everything but di.

OK ....

According to the manual ... (pdf version) ... page 4 / DualBeam Plus Sonar ... it states that the 587ci HD has a 83/200kHz beam ... but it does state this is for "DualBeam Plus" models only, so that eliminates your unit, since yours is a 587ci HD DI model.

Then on the next page (pg5) Down Imaging Sonar ... it seems to indicate that it can produce a conical sonar ping using either the 455 or 200kHz setting, and shows the same graph that "rnvinc" posted.

I was not aware of any unit being able to use 455kHz in a 2d sonar. I stand corrected.

I'd get a hold of HB Greg and see what he says about this situation. It's obvious I'm out of my league, here, and I apologize for any confusion I may have caused.

... cp

Unfortunately, the manual for the 500 series units is an "all in one" manual that includes both the HB "2d sonar only" units (which have 83kHz-200kHz 2d beams)...and the HB DI units (which have 200kHz/455kHz 2d beams)...

This makes the manual very confusing...(I hope HB is listening)...
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toofus...when you say the following...:

Originally Posted by toofuss

If I flip to 455 I loose everything but di.

Are to talking about the 455kHz "Beam Select" setting or the 455kHz "Imaging Frequency" setting...??

Rickie