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F75 no threshold in disc
- Thread starter Ronk
- Start date
vlad
Well-known member
I would suspect D Johnson has it as close to the barest audio as possible.I prefer a threshold because it gives me an idea of the ground changing, along with nulls
letting me know I'm walking over targets discriminated out.
You could try running it a little high in sensitivity to get some noise which in a way is a threshold. Or put it in stat mode with a variable threshold---that kind of power you have never seen.
But the numbers do jump more--its literally something you have to learn-stat if used correctly will properly identify round iron better than any motion mode (7/11DD.)
letting me know I'm walking over targets discriminated out.
You could try running it a little high in sensitivity to get some noise which in a way is a threshold. Or put it in stat mode with a variable threshold---that kind of power you have never seen.
But the numbers do jump more--its literally something you have to learn-stat if used correctly will properly identify round iron better than any motion mode (7/11DD.)
I wasn't referring to actually hearing the threshold in disc mode. I was only curious of how close to the null point it is set whether it's slightly below or above. I realize we have to accept the fact that it's silent search in the disc which is fine for me. I Do search in all metal when conditions allow and experiment with different threshold settings.
Ronk
Ronk
mheastboston1
New member
Sounds like your talking about audio plus or minus??
REVIER
Well-known member
The F70/Patriot is built on the same platform and startup thresh settings on those are -3 so to assume the F75's in disc would be about the same probably wouldn't be a stretch.
Neither has DST and when they added that into the F75 I believe they raised the gain from startup 60 to 80 so there is a possibility the thresh got bumped a bit too but I assume it is still below 0...but don't quote me because I really don't have a clue.
Could be the thresh is now at 0 or higher for all I know.
Maybe Dave J. Will pop in here and tell us sometime soon.
Neither has DST and when they added that into the F75 I believe they raised the gain from startup 60 to 80 so there is a possibility the thresh got bumped a bit too but I assume it is still below 0...but don't quote me because I really don't have a clue.
Could be the thresh is now at 0 or higher for all I know.
Maybe Dave J. Will pop in here and tell us sometime soon.
Mike Hillis
Well-known member
Hi Ronk,
The Sensitivity setting controls the threshold settings of the F75 in Disc mode. Remember, the F75 only has two (2) gain settings. Low and High. Sensitivity setting of 1-29 control the threshold in the Low Gain setting and Sensitivity settings of 30 - 99 control the threshold settings in the High gain setting.
Disc mode employs additional filtering that requires a set signal strength to work, so the Disc threshold and AM threshold are not really apples to apples comparisons.
I guess you could compare where the Visual Id kicks in at the different settings of Disc and AM and make a comparison of that.
The F70's Threshold control in Disc is there primarily for noise control. Think of it as a pre-DST EMI control. The default setting was chosen for EMI stability reasons.
HH
Mike
The Sensitivity setting controls the threshold settings of the F75 in Disc mode. Remember, the F75 only has two (2) gain settings. Low and High. Sensitivity setting of 1-29 control the threshold in the Low Gain setting and Sensitivity settings of 30 - 99 control the threshold settings in the High gain setting.
Disc mode employs additional filtering that requires a set signal strength to work, so the Disc threshold and AM threshold are not really apples to apples comparisons.
I guess you could compare where the Visual Id kicks in at the different settings of Disc and AM and make a comparison of that.
The F70's Threshold control in Disc is there primarily for noise control. Think of it as a pre-DST EMI control. The default setting was chosen for EMI stability reasons.
HH
Mike