Topic: CHIRP specs?

[felvic]

Hello,

I'm looking desespertly for the specs of the Helix 7 SI GPS transducer XNT 9 SI 180 T.

Specially performance regarding the dB.

Thanks for help

[rnvinc]

Basic specs are listed on the HB website for the included XNT 9 SI 180 T for the Helix 7 SI GPS  ...

https://www.humminbird.com/Products/HELIX-7-SI-GPS/

What other specs are you referring to  ...??

Are you meaning specs for the G1, G2, or G2N  ...??

Rickie

[felvic]

Basic specs are listed on the HB website for the included XNT 9 SI 180 T for the Helix 7 SI GPS  ...

https://www.humminbird.com/Products/HELIX-7-SI-GPS/

What other specs are you referring to  ...??

Are you meaning specs for the G1, G2, or G2N  ...??

On the fishfinder specs, looks like probably unit CHIRP specs:

Standard Sonar Coverage:20°, 60° & (2) 85° @ -10db (Total of 180°)

We may suppose -10 dB is for 200,83 and 455 Khz frequencies.

But what about the transducer ?

[rnvinc]

The specs listed are the only criteria HB releases on the xducer  ... Fixed frequency beam angles at -10db  and CHIRP frequency sweep range in CHIRP capable models ...

"Q" factor is not released info  ...

What other specs are you specifically looking for  ...??

Rickie

[felvic]

T
What other specs are you specifically looking for  ...??

dB at different frequenzies, like on Airmar transducers:

http://www.airmartechnology.com/uploads/installguide/airmar%20technical%20data%20catalog.pdf

[rnvinc]

dB at different frequenzies, like on Airmar transducers:

http://www.airmartechnology.com/uploads/installguide/airmar%20technical%20data%20catalog.pdf

HB chooses to measure all their piezo beam angles at -10db for advertising purposes  ...

Beam former shape by piezo design is proprietary and not released info by HB  ...

Rickie

[felvic]

HB chooses to measure all their piezo beam angles at -10db for advertising purposes  ...

Beam former shape by piezo design is proprietary and not released info by HB  ...

I understand, but this is unit frequencies not transducer frequencies...

[rnvinc]

I guess I'm not understanding your question  ...

-db is a factor of decreased sound pulse strength  ... pertaining to how the sound pulse is measured as it travels out and away from the xducer (to determine advertised beam angle specs)  ...

Are you looking for the CHIRP transmit sweep frequency ranges  ...??

Rickie

[felvic]

Are you looking for the CHIRP transmit sweep frequency ranges  ...??

Sorry, may be my english is too poor.

I'm just looking for the transducer specs, like on Airmar TM150M specs: http://www.airmartechnology.com/uploads/techdata/95-155a.pdf

Thanks

[rnvinc]

Sorry, may be my english is too poor.

I'm just looking for the transducer specs, like on Airmar TM150M specs: http://www.airmartechnology.com/uploads/techdata/95-155a.pdf

Thanks

Those type of specs are not released by HB  ...

The only specs released are  ...:

*Beam angles of the fixed frequencies measured at -10db  ...
*CHIRP sweep frequency ranges (no beam angles released for CHIRP)  ...
*Power output RMS  ...
*Power output Peak to peak  ...
*Depth capabilities  ...

I also wish HB would release more data relating to their xducers  ...

Rickie

[felvic]

Those type of specs are not released by HB  ...

The only specs released are  ...:

*Beam angles of the fixed frequencies measured at -10db  ...
*CHIRP sweep frequency ranges (no beam angles released for CHIRP)  ...
*Power output RMS  ...
*Power output Peak to peak  ...
*Depth capabilities  ...

I also wish HB would release more data relating to their xducers  ...

Rickie

Thanks!