Power Cycling stops EMI....WHY?

[IDXMonster]

2 different sites. Manual sensitivity 20. All same settings. Checked NC channel and it is 2. Very erratic chattering with machine sitting still,coil on ground. I run through all the NC channels manually one by one to see if any single one is better. They're all the same or very similar. I let the machine NC. It chooses 2. I power cycle the machine with the coil stationary on the ground. When it comes back on it is still on channel 2 and EMI is completely gone. WHY??

 

[tiftaaft]

Great question! I had that happen at a site recently as well... powered up and noise canceled at site and the CTX sounded like a flock of geese in the headphones. Even lowered sens and tried auto +0. nothing helped until I power cycled and let it pick the channel (not sure if it picked the same) but when it finished the threshold was purring like a kitten... found a merc about 10 minutes later, but that is another story... Anyway, I wondered the same thing as IDXMonster.

 

[unearth]

Please excuse my ignorance...what is a power cycle?

 

[IDXMonster]

Please excuse my ignorance...what is a power cycle?

You are far from ignorant Unearth...it's just turning the machine off and then back on again.

 

[dewcon4414]

Likely because it is GBs as well.

Dew

 

[IDXMonster]

Likely because it is GBs as well.

Dew

Dew...you're thinking the ground is bad enough to cause constant falsing when the coil is stationary? It's reading 16 suggested...and I have trashy park type disc pattern.

 

[dewcon4414]

A lot of things take place when the machine is turned on. It will ignore targets under the coil as well as magnetic interference which affect depth. I didnt see the part where you were in a park. Parks are also notorious for high voltage underground wiring. Cycling sometimes will help.

 

[IDXMonster]

A lot of things take place when the machine is turned on. It will ignore targets under the coil as well as magnetic interference which affect depth. I didnt see the part where you were in a park. Parks are also notorious for high voltage underground wiring. Cycling sometimes will help.

In the cases where this has helped I have been in a baseball that has lighting every time. The underground wiring may be my problem Dew. It is interesting how this machine works,I would not have thought that simply by turning it off and then back on that the problem would be gone. But it is...thanks for the insight!

 

[dewcon4414]

I used to hunt a lot of parks so ran into the underwire issue a lot. It could be that running running less modulation does it as well. Maybe the machine compensates and ignores more mineral and EMI....... which can affect the response to the phones. Kind of like having targets under your coil. Then the question is........ how much is that affecting what targets we hit and how deep?