Nox noise cancel

Here is another dumb question. How does noise cancel work with the Nox? Ive used explorers and the CTX...... all had noise cancel which worked very well. We even figured out on the Explorer and ET which end of the scale did what as far as freqs that would work best. But the Nox doesnt doesnt have channels with varied freqs although in the water it seems to be best if you are in the negative digits for me. I can also stand in the same spot and get a dozen back and forth digits. I know a few have tinkered with manual noise cancel..... have we found one that best serves working in the water? Am i to assume it changes some of those so called algorithms....... or is it nothing more than a minor freq shift? Or does it even work to do anything? When you first switch to the noise cancel..... if gives you a digit BEFORE you put that button..... is that what its currently in or is that what its recommending.....and once you push the button is that the same digit it gives you? Mine dont. The CTX had a very good noise cancel.... you could detect by anyone within a few feet. Anyone air test above the wet sand....... get the coil wet..... then air test again? Those digits drop to negitive digits...... like -6. How does salt water affect the air test?

Dew



Edited 1 time(s). Last edit at 10/11/2018 11:19AM by dewcon4414.

I have wondered that also. I can stand in the same spot have coil in the air noise cancel get a 8 then wait 10 seconds noise cancel again and it will be -6 this time why so different in the same spot?

I kind of understand EMI is constantly changing. Use a DB sound reading app on your phone. But it appears very sensitive.....but maybe it’s a very slight freq shift that has very little to do with overall operation. Next... if the box is underwater most of my hunting time is there EMI....or just noise?

lift up the coil in the air, then hit the noise cancel button. I usually point the coil at power lines/houses then hit noise cancel

The manual describes it as slightly shifting the frequency. Which is a pretty dumbed down explanation since its a MF detector operating at supposedly 3 frequencies.
They do mention that each mode needs to be cancelled individually which makes sense. But does it slightly shift all frequencies?... I think I read that somewhere. Or does it shift the main or dominate frequency currently in use based on the selected detect mode?

Questions we may never get an answer to.

I posted this in another thread earlier here.

tnsharpshooter Wrote:
-------------------------------------------------------
> What about Nox and Etrac.
> How do they play together.
>
> Detectors are around 4ft apart formthe testing bel
> ow.
> Etrac ran at 27 Manual sens and Nox at 24 sensitiv
> ity.
> 6 inch coils on both units.
>
> When i use the term unusable below, I am saying au
> dio on one or both detectors imo based on what I h
> ear, detector deemed unusable at the approx proxim
> ity of 4 ft. More distance between could cure som
> e of the affects maybe.
>
> Now, here all I did was listen to Equinox wearing
> wireless headphones and listening to Etrac externa
> l speaker mainly to note any conflicts.
> And there are some it seems.
>
> I’ll check all modes and freqs on Equinox and post
> here.
> Here is a start.
>
> Channel 1 selected on Etrac
>
> Multi freq using using Nox every detect mode chec
> ked with Etrac at channel 1 manually selected. No
> x channel -4 unusable, Nox tied up in knots.
> So it seems the same freq is used in each detect m
> ode per channel maybe.
> Also while in park 1, both 5khz and 15 kHz and 40k
> hz single frequency on Equinox is in direct confli
> ct it seems with Etrac channel 1, with Equinox At
> channel 8. Etrac unusable.
>
> Park 2, Field 1and 2 checked all single freqs.
> Same affects as noted above with park 1.
>
> Other modes checked, same affects with freq select
> ed and channel selected as noted above.
>
> Now switch Etrac to channel 2.
>
> Etrac unusable using multi frequency all detect mo
> des while equinox in channels -9, -4, and 9.
>
> Single freq 5khz channel 2 Equinox renders Etrac u
> nusable.
>
> Single freq 15khz used on Equinox renders Etrac un
> usable with Nox in channels 2and 9.
>
> Single freq 40khz channels 2 and 9 on Equinox rend
> ers Etrac unusable.
>
> Next channel 3 Etrac.
>
> Equinox multi freq used, channels -1, 0 and 9 mak
> e Etrac unusable.
> Channel 5 selected on Nox makes it unusable.
>
> 5khz selected on Nox channels -4 and -1 renders Et
> rac unusable.
> 10khz selected -4, -3 and 0 renders Etrac unusable
> .
> Channel 9 selected Nox unusable
>
> 15khz selected on Nox channels -4 and -1 renders E
> trac unusable.
> Nox sounded ok on all channels.
> 20khz selected on Equinox channel -3 renders Etrac
> unusable.
> Nox sounded ok in all channels audio wise.
> 40khz selected on Nox, channels -3, 0 and 9 render
> s Etrac unusable.
> Nox sounded good on all channels audio wise.
>
> Etrac channel 4 selected
> Equinox in mulit frequency channels 6 and 8 rende
> rs Etrac unusable.
>
> Single freq 5khz and 10khz no serious conflicts he
> ard either way with detectors.
> Single freq 15 kHz on Nox, channels -7 and 0 makes
> Etrac unusable, channel 0 makes Nox unusable
>
> Single freq 20kh selected on Nox, channel -2 makes
> Etrac unusable. Channel 0 makes both Nox and Etrac
> unusable.
> Single freq 40khz selected on Nox, channels -8 and
> 0 makes Etrac unusable, no serious conflicts note
> d with Nox (audio wise)
>
> Etrac channel 5 selected
>
> Equinox using Multi freq rendered unusable channel
> s -7, 4,5 and 6.
> Etrac rendered unusable channels 8 and 9.
>
> 5khz selected on Equinox, channel -5 renders Etrac
> unusable.
> 10khz selected on Equinox channels -7, -5 and -3 r
> enders Etrac unusable.
> Nox sounded ok, no serious conflicts heard audio w
> ise.
>
> 15khz selected on Equinox, channels -5, -3, and -1
> render Etrac unusable.
> Nox sounded good, no serious conflicts noted based
> on audio alone.
> 20khz selected on Equinox, channels -9 and -7 rend
> ers Etrac unusable.
> Nox sounded good on all channels.
> 40khz selected on Equinox, channel -7 rendered Etr
> ac unusable.
> Nox sounded good all channels.
>
> Etrac channel 6 selected
>
> Multifreq selected on Equinox, channels -2 and -1
> render Nox unusable
> Channels -8, -4 and 5 makes Etrac unusable.
>
> 5khz selected on Equinox channels -1 and 0 renders
> Etrac unusable.
> Nox sounded ok all channels.
>
> 10khz selected on Equinox, channels -1, 5 and 9 re
> nders Etrac unusable.
> Nox sounded ok all channels.
>
> 15khz selected on Equinox, channel 7 rendered Etra
> c unusable.
> Nox sounded ok all channels.
>
> 20khz selected on Equinox, channel 0 rendered Etra
> c unusable
> Nox sounded good all channels.
>
> 40khz selected on Equinox, no serious conflicts no
> ted either detector.
>
> Etrac channel 7 selected
>
> Multi freq selected on Equinox. Channels -8 and -7
> render Nox unusable.
> Channels 1 and 3 make Etrac unusable.
>
> 5khz selected on Equinox, no serious conflicts no
> ted either detector.
> 10khz selected on Equinox, channels -2 and 7 rende
> red Etrac unusable
> Nox sounded good all channels.
>
> 15khz selected on Equinox, channel 2 rendered Etra
> c unusable
> Nox sounded good all channels.
>
> 20khz selected on Equninox, channels 7 and 8 rende
> red Etrac unusable
> Nox sounded good all channels
>
> 40khz selected on Equinox, channel 1 rendered Equi
> nox unusable, channel 6 rendered Etrac unusable.
>
> Etrac channel 8 selected
>
> Multi freq selected on Equinox, channels -9, -1 an
> d 3 rendered Etrac unusable.
> Equinox sounds ok all channels.
>
> 5khz selected on Equinox, channels 6, 7 and 8 rend
> er Equinox unusable
> Channels 0 and 7 render Etrac unusable
> 10khz selected on Equinox, no serious conflicts no
> ted
>
> 15khz selected on Equinox, channel 0 rendered Etra
> c unusable
> Nox sounded good all channels
>
> 20khz selected on Equinox, channels 2and 8 renders
> Etrac unusable
> Nox sounded ok all channels.
>
> 40 kHz selected on Equinox, channels 0 and 6 rende
> r Etrac unusable
> Equinox sounded ok all channels
>
> Etrac Channel 9 selected
>
> Multi freq selected on Equinox, channels -6, -3, 3
> and 9 rendered Etrac unusable. Channel -3 rendere
> d Equinox unusable.
>
> 5khz selected on Equinox, channels -1, 0 and 1 ren
> dered Equinox unusable
> Channel 0 rendered Etrac unusable
>
> 10khz selected on Equinox, channels -3, 0, 7 and 9
> rendered Etrac unusable
> Channel 0 rendered Equinox unusable
>
> 15khz selected on Equinox, channel 0 rendered by d
> etectors unusable
>
> 20khz selected on Equinox, channels -3 and 9 rende
> red Etrac unusable
> Nox sounded ok all channels
>
> 40khz selected on Equinox, channel -3 rendered Etr
> ac unusable
> Nox sounded ok all channels.
>
> Etrac channel 10 selected
>
> Multi freq selected on Equinox, channels 1, 4 and
> 9 render Etrac unusable
> Nox sounded ok all channels.
>
> 5khz selected on Equinox, channels -8 and -6 rende
> r Equinox unusable
> Channels -7, 6 and 7 render Etrac unusable
> 10khz selected on Equinox, channel -7 rendered Equ
> inox unusable
> Channel -6 rendered Etrac unusable
>
> 15khz selected on Equinox, channel -7 rendered Equ
> inox unusable
> Etrac sounded ok all channels
>
> 20khz selected on Equinox, no serious conflicts he
> ard either detector.
>
> 40 kHz selected on Equinox, channels -6 and -1 ren
> dered Etrac unusable
> Nox sounded ok all channels.
>
> Etrac channel 11 selected
>
> Multifreq selected on Equinox, channels -2, 2 and
> 5 render Etrac unusable
> Channel 4 rendered Equinox unusable
>
> 5khz selected on Equinox, channels -6, -2 and 9 re
> nder Etrac unusable
> Nox sounded ok all channels
>
> 10khz selected on Equinox, channel -3 rendered Etr
> ac unusable
> Nox sounded ok all channels
>
> 15khz selected on Equinox, channels -6 and 5 rende
> red Etrac unusable
> Nox sounded ok all channels
>
> 20khz selected on Equinox, channel -9 rendered Etr
> ac unusable
> Nox sounded ok channels
>
> 40khz selected on Equinox, channel -1 renders Equi
> nox unusable
> Channels 2 and 3 renders Etrac unusable

tnsharpshooter Wrote:
-------------------------------------------------------
> To conclude the Emi testing I went back and spot c
> hecked to see how well noise cancel actually worke
> d.
> These spot checks I did see the same conflicts thi
> s morning as yesterday. I noise canceled with Equ
> inox at less than 4ft from Etrac’s coil.
>
> ALL spot checks passed (total of 10 noise cancels
> done with each )meaning doing noise cancel on Equi
> nox 800 always went to a non conflicted channel, w
> ith Nox audio quiet. Etrac audio though after doi
> ng Nox noise cancel not always quiet. So Nox runn
> ers and Etrac runners may find each other doing m
> ulitple noise cancels to find stable operations.
>
> Here are the spot checks.
> I geared most to running Equinox in multi frequenc
> y.
>
> Channel 1 selected on Etrac
> Multi freq using using Nox every detect mode chec
> ked with Etrac at channel 1 manually selected. No
> x channel -4 unusable.
>
> Etrac channel 2.
> Single freq 15khz used on Equinox renders Etrac un
> usable with Nox in channels 2and 9.
>
> Etrac channel 3 selected.
> Equinox multi freq used, channels -1, 0 and 9 mak
> e Etrac unusable.
> Channel 5 selected on Nox makes it unusable.
>
> Etrac channel 4 selected
> Single freq 15 kHz on Nox, channels -7 and 0 makes
> Etrac unusable, channel 0 makes Nox unusable
>
> Etrac channel 5 selected
> Equinox using Multi freq rendered unusable channel
> s -7, 4,5 and 6.
> Etrac rendered unusable channels 8 and 9.
>
> Etrac channel 6 selected
> Multifreq selected on Equinox, channels -2 and -1
> render Nox unusable
> Channels -8, -4 and 5 makes Etrac unusable.
>
> Etrac channel 7 selected
> Multi freq selected on Equinox. Channels -8 and -7
> render Nox unusable.
> Channels 1 and 3 make Etrac unusable.
>
> Etrac channel 8 selected
> 5khz selected on Equinox, channels 6, 7 and 8 rend
> er Equinox unusable
> Channels 0 and 7 render Etrac unusable
>
> Etrac Channel 9 selected
> Multi freq selected on Equinox, channels -6, -3, 3
> and 9 rendered Etrac unusable. Channel -3 rendere
> d Equinox unusable.
>
> Etrac channel 10 selected
> 10khz selected on Equinox, channel -7 rendered Equ
> inox unusable
> Channel -6 rendered Etrac unusable.
>
> Etrac channel 11 selected
> Multifreq selected on Equinox, channels -2, 2 and
> 5 render Etrac unusable
> Channel 4 rendered Equinox unusable



Edited 1 time(s). Last edit at 10/11/2018 01:29PM by tnsharpshooter.

I appreciate all the effort that must have went into all of that but What question did all of that answer?



Edited 1 time(s). Last edit at 10/11/2018 07:04PM by dewcon4414.

dewcon4414 Wrote:
-------------------------------------------------------
> I appreciate all the effort that must have went in
> to all of that but What question did all of that a
> nswer?


Freq seems is shifted on both Etrac and equinox when selecting different channels. And when noise canceling the channels selected is one of the cleaner ones. There could be more than one at any given time(location).

Also all freqs seems are shifted (can’t say how much for fresh one) on Nox when using multi freq.

Can also say Equinox seems to still perform quite good (during airtesting) even if one of the freqs while in multi is compromised.

I wasnt going to revisit this..... but. I wasnt asking about the ET..... and unlike the ET which has 11 channels and many harmonics to chose from and sift to the Nox doesnt. It can only shift to those freq available..... which is what 5? Maybe its like wearing my good luck underwear ...... but normally before i get in the water i hit it until i get a negative digit on noise cancel and the machine seem to perform better. Soooo we have all these neg and pos noise cancel digits popping up so it doesnt seem to work like the CTX.... or as good i might add.... an Xcal will drive it nuts and i can hunt nearly on top of an Xcal with the CTX. So ....is it changing the WEIGHTED freq ever so lightly.... which could affect how it does in the dirt or on targets.

[www.detectorprospector.com]

[www.detectorprospector.com]



Edited 1 time(s). Last edit at 10/14/2018 11:46AM by tnsharpshooter.