trash setting

[Willie3960]

Ive had my etrack for 3 months now really great detector with trash set to high it finds good targets with iron is amazing dose this settings hurt depth .

 

[EtracTom-AdirondacksNY]

No it just tells the machine to ignore or null out the bad discriminated targets and allow the sound and target id to come through on the good targets next to or near a bad target.

Trash low setting allows the dominant targeteither good or bad to come through with a sound and target id instead.

 

[Jeff63]

When it comes to Depth this is what I discovered. Try this test and it might open your eyes to a better understanding of the E-Trac. Do an Air test using the stock coil and a plastic ruler. Place the ruler on the end of the coil then using a Quarter or Half Dollar see how much depth you get on the depth meter compared to the ruler. I used a walking liberty half and I was on Channel 11 noise cancel, got 6+ inches then I switched to channel 2 and 6 and got 10+ inches. Lower channels are better for Silver and Copper Higher channels better for Gold. My first season with the E-trac I couldn't understand why I wasn't finding deep coins over 6-7 inches now I'll use channel 2 or 6 only in my area. My air test on channels 9,10,11 using the walking liberty half only got me 6" and using channel 2 or 6 got me 10" on depth

 

[Idaho PRB]

Any other opinions on channel selection and depth? I always just noise cancel and let the machine pick the channel for the area / conditions.

 

[Johnnyanglo]

My opinion is that channel selection, if it has any depth qualities at all, would find Channel 11 for low conductors (gold, iron) and Channel 1 for high conductors (silver).

The E-Trac transmits at 2 freqs, a long pulse waveform at 3.125 kHz and a series of short bursts at 25KHz. When you change the channel from 6 (normal) to channel 1 (low), you are dropping the harmonic freqs just a tad (10%) - from 25 to 22.2KHz, likewise with the low freq pulse. Raising to Channel 11 bumps the high freq from 25 to 27.78KHz and the low pulse likewise.

It is unlikely this makes any real difference. If there is even slight EMI, not adhering to the cleanest channel should detrimentally affected performance. The only way to test that low and high conductors respond differently between channels is to test the performance in an EMI isolation booth - where EMI is excluded. Air testing in a house or suburbs would be inconclusive and invalid due to the ubiquitous EMI.

But, if people believe they got that sliver quarter because they manually set their unit to Channel 1 and would have missed it on Channel 11, have at it. Chances are, if you are doing better at a particular channel it's because the EMI issue has been slightly mitigated, and if worse, because that channel contains interference from environmental noise.