Noise canceling does it make a difference?

[robertj298]

Did a search and couldn't find anything. I'm wondering if there is any difference performance wise between all the different channels?

 

[MikeO]

Without typing a lot of repetitive information this thread covers it pretty much in all aspects.
Thread about Noise Cancelling

 

[robertj298]

-- moved topic --

 

[Chris(SoCenWI)]

Boy Robert,

There should be a million and one threads on this as it was much debated in the old days. Noise cancel is designed to help with electrical interference. If you turn on you detector in the house next to a TV or florescent lights you will have the machine go nuts. Noise cancel slightly shifts the frequency of one of the transmitted signals, listens for noise, and then shifts it again, up to 10 times. It then picks the channel where is heard the least noise.

If you are detecting near another explorer user being on a different channel can make a huge difference. Around power lines or most other sources of EMI we deal with in the real world the noise is spread over a fairly wide frequency range and noise cancel will have a less pronounced effect. It might allow you to bump the sensitivity up a notch or two, which is nothing to sneeze at.

Chris

 

[firtyfwee]

id honestly say the noise cancel does affect the spectrum of targets in the measures between conductivity and size

for example a .69 gram 14k gold charm wont even register in NC 11 but will in 1-2 NC.

 

[dewcon4414]

Thats very true Firty, but on the beach in the wet sand to quiet it down use something closer to 11. In many areas if you check your NC channel you wont see a lot of difference.... somewhere around 5 or 6. But.... if you want to play with it you will find its a little more sensitive to low conductors on low end. Odd.... the ET was just the opposite. I also try to NC at detecting height.... old style was on the ground.... my choice. You will also find a bit of difference in say the wet sand if you turn on your detector their as opposed to transiting into it from the dry.

Dew

 

[ohio fred]

WHY DO WE NEED NOISE CANCEL IN THE EXPLORER AND SD2200D?

The BBS/FBS/MPS detectors transmit and receive a wider range of frequencies than single/dual frequency detectors. Consequently, a wider range of atmospheric electrical noise can interfere with the internal processing circuits, resulting in an oscillating (warbling, chirping) threshold and resultant loss of sensitivity. The

 

[NealNoIN]

Channel 11 worked better on high conducters AND low conductors. I'm talking about 2" more depth on big coins. That is wild.
I would have to gather that if the environment will allow it then go with channel 11 whenever possible. Of course that may be one
of the noisiest on average. In my house however channel 1 was a little noisier.
Neal

 

[u2robert]

Channels or Frequency's 1-16.1kHz, 2-15.7, 3-15.2, 4-14.8, 5-14.4, 6-14.1, 7-13.7, 8-13.4, 9-13.1, 1 0-12.8, 12.5kHz on the Explorer ll. 1 for small targets 11 for larger targets. is this correct? i am new to the Explorer.

 

[u2robert]

Just air tested using noise canceling at setting 1, Quarter air tested at 9.5" to 10" then set noise canceling at 11 air tested quarter at 12.5" to13" big difference for this unit.

 

[Chris(SoCenWI)]

n/t

 

[u2robert]

manual, without a doubt is deeper than auto

 

[teleman2525]

lots to take in lots to learn i,ve got lots of testing ahead of me to get the settings just right as most of my best places to hunt are far away from most sources of emi cellar holes in the woods have no power any were,s