Noise cancelling

[dewcon4414]

Ive always been one to noise cancel at swing height. Well i got a ton of noise today when testing the SE. I tried to noise cancel at about knee high... i tried 3 times and nope. So i put the coil ON the ground and i didnt get anymore noise after noise cancelling. So i guess it depends on where the noise is coming from. Ive never been able to get mine to noise cancel at the factory recommended height. Does everyone noise cancel after turning there machines on? If so why? Ive never noticed a difference in depth.... no i do noise cancel occassionally during my hunts just to reset things if ive moved around much.

Dew

 

[utahshovelhead]

I tend to noise cancell at the begging of a hunt and durring if/when i start getting an erratic machine. I think its a habit from ground balancing the XLT. But If It doesnt stabalize with that then I start adjusting other controls.

 

[Hotcz70]

make very sure I'm over clean ground when I noise cancel. After turning the machine on...it might take me 10 minutes to find a clean spot. I then raise my coil about 12" off the ground. I've noticed when I get impatient and don't find a clean spot....my SE is not as stable...and doesn't seem to get the same depth for me.

 

[Mike Bearden]

There will always be a debate on the proper way to noise cancel.

Noise Cancel accomplishes 2 different things when used.
The coil is like an antenna measuring the soil matrix and any immediate surrounding electrical interference that may be coming from the ground and the air waves.

When Noise Cancel is turned ON and it runs through the cycles, the software measures resistance from these interfering sources and adjust the Explorer accordingly to a channel that makes a good marriage with the previous user settings.

Another good reason to Noise Cancel again after making major changes to settings.

I would NEVER use ground cancel before making sure I had the coil over a target free area first, then I lower the coil to the GROUND, keep it still while it cycles through and it's done unless I run into instability and then I'll try turning down the sensitivity first.

The original S and XS Explorer manual never stated anything about holding the coil still while up in the air to noise cancel ... I just don't believe it gives the same results and I've used every model of Explorer since they we're released.

Now I have tried bobbing the coil from knee high down to 2" above the ground while doing Noise Cancel and it worked like a charm, got the same channel as I did the other way.

But each to his own .... you know you've made good decisions when you're finding the treasure though.


Good Hunting
Mike

 

[Frase44NY]

still not sure though if on the ground or in the air is better. I did read somewhere, not sure how true it is, that certain channels can effect depth..anyone else know about it??

 

[Dan-Pa.]

Still not sure if the tech's lay it on the ground or hold it off the ground and would presume it depends on your hunting area. Your call I guess and whatever works...

 

[Tinfoil]

n/t

 

[Dan-Pa.]

Good point(don't detect air) and I also have my coil on the ground with no movement, however outside interference may or may not come from the ground and just might be that high tension line running over your hunting area so guess we are back to square one( sort of a catch 22). I firmly believe it all depends on your area where you hunt when you noise cancel relative where coil is and imagine what works should cover it all as two schools of thought on the subject and no use beating a dead horse to death...

 

[dewcon4414]

Frase... when you noise cancel the Explorer selects one of the 11 channels. Each of these channels have 28 harmonic that are randumly set or should i say SET at randum kHz.. unlike the SOV which has its freq set every 1.5 kHz. Where these harmonics are set will deffently affect your depth... if they tend to be nearer the 3 kHz you should get a little better depth but may be affected more by EMI... nearer to 100 kHz the effects are a little better sensitivity but things like hot rocks tend to be a pain. If i remember right trying to decipher the minelab patten out of those 28 harmonics only 3 best are used by the processor. Sometimes its just better to know the darn thing is work correctly. Thanks Bryce you alway have great info. You explained it very well Mike thanks. I always noise cancel on occassion especially if i chance my sensitivity... comes from my DFX use i guess. I still beleave no two machines are created equal.

Dew

 

[NealNoIN]

there usually is no noise to hear when the sensitivity is down. When the sens. is up there is plenty of noise to hear in each channel and maybe only then can the machine pick the most quiet channel. OR does the machine hear the noise even though I can only hear a threshold hum????????
HH
Neal