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Frequencies and Analysis

April 02, 2019 03:28PM avatar
LOL, Well done,

I was suspicious seeing just the 1 frequency on your printout and thought that perhaps you'd set the 800 for a single 15kHz output and had forgotten to set it back to MULTI, which is why I asked about jumping through the frequencies 1 by 1 and seeing if the output followed along on your spectrum analyzer. I thought it would be 'rude' to suggest a mistake had been made but considered the April 1 date as well. grinning smiley

As for my experience with my particular 800, I consider the target and audio ID to be excellent at depth.

Rich (Utah)





Quote
glabelle
Sorry Rich, you fell for the April 1st measurement ;-) I figured it would freak out some.

I was just getting started attempting to measure the output from the 800, to see what was going on. As you notice, the analyzer I used only went up to 22KHz - typical CD music output. So this was not a fair test at all. Need to go up to 40KHz at least. Also, the transmit frequency was manually set to 15 KHz, so naturally that's all there was on Park 1.

I have since finalized the test setup, to include a measurement up to 50KHz, and reset the 800 to factory default. Fear not, the 800 does indeed put out multiple simultaneous frequencies in ALL modes. The machine obviously changes its method for analyzing the signal in the receiver - based on the selected modes. So, indeed, it probably "weights" different frequencies in different modes (i.e. lower frequencies in Park 1, higher frequencies in Park 2)

So what Minelab states about better ID capabilities could be true, based on feedback from users, and theory.

The (maybe) negative - reported by users - is that it is not a "deep seeker". Potentially because the transmitter puts out multiple frequencies. A way to test this would be to see the difference in depth between using Multi-IQ and a single frequency on a target. I'm not sure whether this is true, or Minelab didn't want to badly hurt their CTX business, or it doesn't exist! Conceivably the transmitter's field strength is hurt by the coil not being tuned to a single frequency to provide maximum intensity. I just don't know fer sure.

See attached graph for the actual output from the transmitter - and this was the same for all modes.

XP Deus (soon)
Minelab Equinox 800
Garrett ProPointer AT
Subject Author Views Posted

Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

Monte 154 March 30, 2019 11:05AM

Surprise, surprise! Attachments

glabelle 95 April 01, 2019 04:55PM

What frequency am i really anyway?

Rich (Utah) 71 April 02, 2019 08:06AM

Re: What frequency am i really anyway? Attachments

glabelle 68 April 02, 2019 11:08AM

Frequencies and Analysis

Rich (Utah) 66 April 02, 2019 03:28PM

OOOOPS N/T

Rich (Utah) 53 April 02, 2019 08:06AM

Surprise!

Rich (Utah) 57 April 01, 2019 08:35PM

Re: Surprise, surprise!

WM6 56 April 01, 2019 06:27PM

Re: Surprise, surprise!

glabelle 47 April 01, 2019 09:55PM

Re: Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

glabelle 65 April 01, 2019 10:02AM

Single / Selectable / Multi-Frequency.

Rich (Utah) 77 April 01, 2019 04:00PM

Re: Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

WM6 69 April 01, 2019 12:52PM

Re: Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

NWCindy 59 April 01, 2019 06:00PM

Re: Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

Kickindirt 87 March 30, 2019 09:01PM

Why i like multi frequency

zincoln 104 March 30, 2019 03:07PM

Re: Why i like multi frequency Hey Brian

Kickindirt 90 March 30, 2019 09:11PM

Re: Why i like multi frequency Hey Brian

zincoln 90 March 31, 2019 07:37AM

My name is Rich and I’m a multi-freq’r. thumbs up N/T

Rich (Utah) 58 March 31, 2019 09:04PM

My name is Monte and I'm a multi-frequency user, too!

Monte 77 April 01, 2019 02:33AM

Re: Why i like multi frequency Hey Brian

Kickindirt 69 March 31, 2019 11:24AM

Interesting topic N/T

Rich (Utah) 66 March 30, 2019 01:48PM

Re: Some 'traveling thoughts' on Single or Selectable Frequency Vs Simultaneous Multi-Frequency.

jmaryt 96 March 30, 2019 12:36PM

My old standby of single freak 6.59 kHz works for meWhite's Electronics N/T

Hombre 84 March 30, 2019 11:39AM



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