QUESTIION for all of you please.....

[Old Katz]

I was looking at another forum where the writer was asking the following question and he mentions the MXT:

Just a quick question for all OMEGA 8000 owners. Does this unit have built into it a threshold setting? Let me explain what I mean. My MD hunting buddies and I go relic hunting in CW era fields looking for relics that are deep CW finds. 3 of them have Whites units and one has a Nautilus. While the Nautilus doesn't do this, the WHITES detectors will let them know that they have something deep in the ground by giving them an audio low growl type of sound, while the visual screen does not register whatever it is that is in the ground (means it is SOMETHING deep) Nothing usually (but sometimes) will let them know via VDI or anything visual on the screen that the detector "thinks" it is, but when headphones are on, you can "HEAR" something that the detector is trying to decode and let you know that there is something good in the ground, deep, with a low pitched growl.

Ok, I wasn't aware of this. I've never heard it on my MXT. Can any of you Guru's enlighten me? Maybe this applies only to certain White machines.
Thanks
Katz

 

[RounderRick]

I'm not sure if you're talking about the whisper sound that don't show a vdi or not but if so here's a link that Jeff Foster explains it well and tells you how to test your mxt to hear it.

http://www.findmall.com/read.php?25,216067

 

[Old Katz]

No. He talking about a low growl sound. I've never heard it, unless hes talking about the lower tone it makes in relic mode.
Katz

 

[RounderRick]

Not sure there all I've ever got from my mxt is the high and low tones in the relic mode and the slight rise of the threshold tone maybe Nancy can shed some light here she's been using one for several years.

 

[Monte]

I now that it is difficult, at times, to explain what YOU listen for so others might understand.

I was looking at another forum where the writer was asking the following question and he mentions the MXT:

Just a quick question for all OMEGA 8000 owners. Does this unit have built into it a threshold setting? Let me explain what I mean. My MD hunting buddies and I go relic hunting in CW era fields looking for relics that are deep CW finds. 3 of them have Whites units and one has a Nautilus.

This was, or could have been, difficult for some to answer because they are not familiar with the MXT or other models that have traditionally relied upon a audible "Threshold" setting.

... the WHITES detectors will let them know that they have something deep in the ground by giving them an audio low growl type of sound, while the visual screen does not register whatever it is that is in the ground (means it is SOMETHING deep).

Many/most makes and models will not provide a very accurate, or even functional, visual Target ID on "deep" targets. The "low growl" sound could be referring to using the Relic Mode with with the all-metal "mixed-mode" audio, or was the poster referring to just a low (as in weak or faint) audio response from a deeper target? My 'guess' would be the use of Relic Mode but ... ???? You would mainly get the "low growl" audio from iron .. OR .. from a target that is deep enough to be just out of the effective range of the motion-based Discriminate mode. Thus, the All Metal mode (working in the Relic's "mixed-mode" function) might be all that is conveyed.

Nothing usually (but sometimes) will let them know via VDI or anything visual on the screen that the detector "thinks" it is, but when headphones are on, you can "HEAR" something that the detector is trying to decode and let you know that there is something good in the ground, deep, with a low pitched growl.

Yep, this sounds like the MXT''s Relic mode with just a hint of a response from a deep target.

Ok, I wasn't aware of this. I've never heard it on my MXT. Can any of you Guru's enlighten me? Maybe this applies only to certain White machines.

While it was stated there was a "low growl audio" and no good visual TID, or nothing repeatable or "lock-on" perhaps, what was missing was a description of what Gain (Sensitivity) level was being used. If the MXT's Gain setting was at about the 10-o'clock position to about a 12-o'clock position, then in the Relic Mode the MXT will not only produce a 2-tone audio with a "low growl" from ferrous targets, but also from those targets that the All Metal function might process but not ample signal to be filtered through the Discriminate mode.

This is one reason why I prefer, as do many savvy MXT users, to operate with a higher Gain setting. Most often I work my MXT above the factory "preset" marker and will be at the +3 position. A little noisy, perhaps, but that's okay with me in most settings. If it is terribly noisy, then I reduce it only enough to be a bit more stable.

I searching at a low to mid-range Gain level, the audio will be much more modulated whereby shallower targets will produce a strong audio but after a few inches from the coil he audio response will start to drop off and get weaker and weaker as the coil-to-target distance increases. The result could be a lower-level of audio and much less total response including less signal for TID processing.

By working the MXT at the higher gain settings you will hear a stronger audio response that will be more saturated, and that means a stronger (louder) audio from 'deeper' targets and more signal for processing. This could result in more TID information being conveyed.

So, the posted comments you refer to might have been someone using an MXT in a dual-tone audio function with a reduced Gain level and they could hear a subtle response from a deeper target provided by the All Metal function of that mode.

Just my thoughts.

Monte

 

[srf2112]

Exactly ! ?!? JK Great analysis and explanation again Monte. Now if I can just re-read it 4-5 times.....
HH
Scott

 

[Old Katz]

Thanks. That explains it to me quite well.
Katz