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ctx 3030 manual vs auto sensitivity
- Thread starter jaanusl
- Start date
Jason in Enid
Active member
No, auto and manual are not the same. I know that seems confusing. The CTX uses 3 "channels" of frequencies. In the auto mode the CTX picks the quietest 1 channel. In manual mode it uses all 3 channels.
Johnnyanglo
Active member
The sensitivity in Auto is not the same as in Manual with the CTX. Notice the difference in a US Dime in Auto +3 -- the sensitivity is no better than it would be at around Manual 15. The benefit of Auto +3 is the detector appears stable with far less random chirps. But if you are looking for the deepest targets then you'll have to abandon Auto mode. When detecting, let it chirp away, that is the new background threshold, ignore it. Dig anything that is NOT like the background threshold!
Rototiller
New member
Johnnyanglo, do you have a chart like the one above for nickels? Nickels are my favorite to dig. I always run in auto, but I get terrible depth on nickels.
IDXMonster
Well-known member
This is a fine line that each person has to walk according to their specific site and skill level. Having a newbie sail into some horribly trashy place and run Manual 25 will net them exactly ZERO. There is a “threshold”(no relation to the threshold hum)at which signals become uninterpretable to the untrained ear as the sensitivity is progressively turned up. Even a very experienced user can lose targets with a sensitivity too high, so use the above chart carefully, and most importantly, use the sensitivity control in conjunction with your own experience and specific sites.