Jump to content

Equinox Is Multi Frequency? Or Isn't It? Is It Not? It Is! Isn't It?


Recommended Posts

Deep in the depths of winter here, I found myself partaking in some serious speculating.

With all the controversy of whether or not the Equinox is multi frequency or not, I figure I'd bring some wood to keep warm lol.

Some of you may recall in one of those threads I was trying to explain that the waveform we see can actually be comprised of more then one, two, three or more frequencies. Additionally I pondered if the multi frequency processing could just be done on the receive side using typical sinusoidal waves that are actually doing the work. Nonetheless here is the transmit side, the side that actually excites the target.

Below you will see a FFT (Fast Fourier Transform) of the Equinox in Gold2. The scale goes from DC to 125 kHz. (Left to right)

If you consider the advertised range of Multi-IQ frequencies as being 5 kHz to 40 kHz, you might be satisfied by this as the left half of this 125kHz graph is filled out nicely. There is even a couple little peaks up around 100 kHz, whether or not that is utilized I don't know.

I'm way off base as to how MIneslab actually does this, but I just wanted to show the kind of information that can be extracted from these signals. I am not trying to prove anything specific other then to say I don't think Minelab is being misleading IMO. Assume something is a little off with my measuring, still that looks like multi-something.

The approximate frequency peaks of interest measured from left to right are:

-2.5 kHz

-8 kHz

-13 kHz

-18 kHz

-23.5 kHz

-28.5 kHz

-33.5 kHz

-39 kHz

-44 kHz

-50 kHz

-54 kHz

-59.5 kHz

That covers the advertised range of frequencies which exist on the left hand side of the graph, (Midpoint is 62.5 kHz) I wont bother with the higher frequency stuff as it may not be relevant.

It doesn't really hit any of the single frequencies, on the other hand Minelab does not explicitly say what frequencies are used in Multi-IQ. (That I know of.) I am happy to see that low frequency response. I was thinking the Equinox was going to be all 8 kHz and higher, which it basically is, but I'm glad to see the 2.5 kHz peak right beside it and of almost equal strength.

Equinox FFT.jpg

  • Like 4
Link to post
Share on other sites

I too have saw the 2.5 kHz show up on the multi-frequency scans I've done.

I too am 100% satisfied with my Equinox.

Hats off to Minelab, another winner in my book.

 

 

  • Like 5
Link to post
Share on other sites
19 minutes ago, Mark Gillespie said:

I too have saw the 2.5 kHz show up on the multi-frequency scans I've done.

I too am 100% satisfied with my Equinox.

Hats off to Minelab, another winner in my book.

 

 

I went back and found those posts by EL Nino, his results have the same peaks as mine. I was looking for yours as well, maybe you didn't post them. That's alright either way.

  • Like 2
Link to post
Share on other sites

Equinox .. : Patent :US7432715 , US7579839....Minelab says in the patent that Tx emits from 2.5kHz-80khz - but the RX side receives frequencies from 5khz to 40khz and all over 40khz is filtered ...

A few days ago I made measurements and compared all Equinox programs on Old 1.5.0 and New 1.7.5. Firmware, So soon to publish it ...I have also scanned the frequency of 5,10,15,20,40kHz ....
 

  • Like 4
Link to post
Share on other sites
11 hours ago, EL NINO77 said:

Equinox .. : Patent :US7432715 , US7579839....Minelab says in the patent that Tx emits from 2.5kHz-80khz - but the RX side receives frequencies from 5khz to 40khz and all over 40khz is filtered ...

A few days ago I made measurements and compared all Equinox programs on Old 1.5.0 and New 1.7.5. Firmware, So soon to publish it ...I have also scanned the frequency of 5,10,15,20,40kHz ....
 

I have been reading those patents over, they are very interesting. I'll admit the first one is pretty long, I forget what I am reading after a while, just mouthing the words like I'm back in  school. lol

The patents are more specific and fortified due to the nature of the documents compared to the ads we see from the marketing department. Dumbed up vs dumbed down? lol

It's starting to become a little more understandable.

  • Like 1
Link to post
Share on other sites

As El NINO mentioned the Equinox transmits up to 80 kHz I thought I would try and get a better measurement to see the higher frequencies a little better. Again my measurement might have put a slant on the result as I doubt the coil I used to test with would give a flat response over such a wide range.

I also included a picture of the ~2.5 kHz "square" wave or whatever you want to call it.

 

 

TEK000.jpg

TEK0001.jpg

  • Like 3
Link to post
Share on other sites

I made measurements of EquinoX 800 on old 1.5.0 and new firmware 1.7.5: 

Park1: 1.5.0 

EQpark1-1.5.0-multi.JPG

Park1 : 1.7.5

EQPark1-1.7.5-multi.JPG

  • Like 4
Link to post
Share on other sites

Park2: 1.5.0

EQPark2-1.5.0-multi.JPG

Park2: 1.7.5

EQPark2-1.7.5multi.JPG

  • Like 5
Link to post
Share on other sites

Field1: 1.5.0

EQField1-1.5.0multi.JPG

Field1: 1.7.5

EQField1-1.7.5multi.JPG

  • Like 5
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Similar Content

    • By midalake
      So for you experts on EMI interference.  Does EMI effect the powerhead?, coil? or both????   Thanks. 
    • By GB_Amateur
      Is there now marketed or has there ever been available a detector which inverts the audio volume scale?  Many applications produce better finds from the weaker signals, either because those items are smaller (e.g. micro jewelry) or deeper (e.g. old coins and nuggets).  Having to listen through the din of trash to hear the weak signals for most detectors is mentally fatiguing.  I wouldn't be surprised if this is/was possible with analog electronics, but seems like a task that digital processing could handle easily(?).
    • By 1515Art
      I posted this in the vanquish thread but it’s buried fairly deep so I’m asking here too, about the vanquish, it’s multi iq technology rooted in VLF technology or is it something different all together? I was under the impression this is a multi frequency VLF detector that basically samples multiple VLF  frequencies simultaneously to better I D targets and while the way it makes this possible is unique the signal would have the same limitation in heavily mineralized soil same as any VLF detector?
    • By Redneck
      Winter will be  starting to set in soon, and cabin fever will soon be running rampant ,  time to think about the next dream machine from Minelab.
      What improvements would you like to see over the Nox 800?  Preformance is always a biggie.
      More depth, more Stable ID at that depth.  
      Wider numerical ID system, 0-100.   
      Better selection of optional size coils.
      Or, maybe an etrac or explorer features in the nox liteweight  style? 
      Adjustable handgrip  pod.
      EMI  elimination system.
      If you request it, maybe they will build it. 😁
    • By pinpointa
      How many guys would like JUST A BLING BEEPA. Designed completely for recovering jewellery. Having a lower range and medium so you can just get bling with a bit of rubbish included.
      Come on their from  Nokta Makro you guys can do it. 
    • By abdel33
      Hello everyone,
      I am new here to this forum.
      Recently my home town at my home country,  prospectors started to discover Gold nuggets in large sizes at the surface without digging it, see the attached email
      The creek and valleys are so large that you can not cover by using a  handheld detectors. I did some search and came across two other types.
      One is using a drone metal detector although the product is not out yet https://www.treasurehunter3d.com/dronerover and the other is long distance detectors upto 2km and 30 meters deep http://www.megalocators.com/en/  or http://www.imagelocators.com/index.php/component/virtuemart/long-range-locators/x-finder-gold-detector-long-range-locator-detail?Itemid=0  video is 
      https://youtu.be/kv6EmzH34Ao
      I couldn't find review on the performance on the long range detectors, did any of you use it? or whether these are legit products that work?
      Thank you
       

×
×
  • Create New...