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Electronics Forums => General Electronics Q&A => Topic started by: Curt on December 22, 2016, 07:46:40 PM

Title: What The Heck is CHIRP?
Post by: Curt 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)

Title: Re: What The Heck is CHIRP?
Post by: Nightmare 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.

Title: Re: What The Heck is CHIRP?
Post by: Curt on December 22, 2016, 09:19:06 PM

OK. Thanks @Nightmare I like "nutshell" explanations best!  :thumbup:

Title: Re: What The Heck is CHIRP?
Post by: Jig Man 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.

Title: Re: What The Heck is CHIRP?
Post by: Nightmare 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).

Title: Re: What The Heck is CHIRP?
Post by: Curt on December 23, 2016, 06:27:09 PM

Quote from: Nightmare on December 23, 2016, 09:00:26 AM

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

 (giggle)

Title: Re: What The Heck is CHIRP?
Post by: frugalangler 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 (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.