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Author Topic: What The Heck is CHIRP?  (Read 4479 times)

Offline Curt

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What The Heck is CHIRP?
« on: December 22, 2016, 07:46:40 PM »
While window shopping for a fish finder/GPS I keep seeing CHIRP. Can someone please tell me what CHIRP is and why it seems to be such a big selling point?  (shrug)

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Offline Nightmare

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Re: What The Heck is CHIRP?
« Reply #1 on: December 22, 2016, 09:02:38 PM »
Nutshell version: Normal 2d sonar uses single pulses (pings) of a single frequency to get the information translated into the picture on your screen. CHIRP uses a series of pulses - each a slightly different frequency - in each ping. This creates a more refined picture on your screen and provides increased target separation.

This is my best understanding of its essence.

Offline Curt

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Re: What The Heck is CHIRP?
« Reply #2 on: December 22, 2016, 09:19:06 PM »
OK. Thanks @Nightmare I like "nutshell" explanations best!  :thumbup:

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Offline Jig Man

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Re: What The Heck is CHIRP?
« Reply #3 on: December 22, 2016, 09:53:21 PM »
My new units have 3 chirp settings and I can't for the life of me see much difference in them and regular 2d sonar.
« Last Edit: December 23, 2016, 09:01:36 AM by Jig Man »
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Offline Nightmare

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Re: What The Heck is CHIRP?
« Reply #4 on: December 23, 2016, 09:00:26 AM »
 :rolleyes:
Ain't vouchin' for it - just 'splaining' what I know about it

Ain't got it so can't say either way. Too invested in HDS G2 to think about even buying "cheap" chirp (Hook).

Offline Curt

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Re: What The Heck is CHIRP?
« Reply #5 on: December 23, 2016, 06:27:09 PM »

Ain't vouchin' for it - just 'splaining' what I know about it


 (giggle)

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Offline frugalangler

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Re: What The Heck is CHIRP?
« Reply #6 on: December 27, 2016, 11:15:50 AM »
Here's a link to a 'techie' explanation that is more layman's terms readable.

http://www.tritech.co.uk/chirp

CHIRP btw is an acronym for Compressed High Intensity Radar Pulse, commonly now used to refer to the sweep spectrum technology that the industry settled on. CHIRP is the affectionate term the industry is using for the sweep spectrum signalling being used vs. the single frequency of past.
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