Deus II: About the oscillogram

[ivconic]

Forget the last one. Skippy, your waveform in #70 is probably right. Still requires some DC offsets at the held peaks. Also, this ceases to be MF, maybe it's one of the SF modes.

[Marchel]

Today I bought a coil X35 for testing and measurement so I'm attaching some photos for now. I will add detailed information and photos about the measurements today or tomorrow. If anyone has any questions about the measurements then me.

[Marchel]

Hi


So here are the results of my measurements, I measured the TX signals ADC_CNV and SPI_CLOCK at 4kHz frequencies in BOOST mode and at a maximum frequency of 27.6kHz. I also measured the current taken from the battery with the TX coil connected at 4kHz BOOST and 27.6kHz. Furthermore, a measurement was made with the TX coil disconnected in order to calculate what current the TX coil itself draws at minimum and maximum power. The SPI data is 16 bit so it is a 16 bit ADC and not as it was in the old coils that used the Differentia 18 bit ADC AD7691, X35 coils probably use a 16 bit Pseudo Differential AD7988-5 whose data match the measurement values.

https://www.analog.com/en/products/a...doc=AD7982.pdf

[filos]

👍👍👍

[Riss]

In the previous 2 weeks, twice at the same settlement (coins from the Roman Empire are found), an experiment was conducted on the real effectiveness of two detectors - DEUS II and an analog detector - garage-made with double differentiation of the signal. Both times the ultra-modern digital detector was "smudged" (defeated) - it pulled out 4-5 times less coins. Its owner bought it in the summer of 2022, knows it very well - during this period he has over 50 trips with the deus 2 and is very happy with it. Any guesses about the features of the settlement and the garage detector? After a few guesses, I will give you details , but I'm curious about your initial opinions

[Bill512]

TGSL??

[Riss]

TGSL ?- no ... double differentiation is slightly faster than the basic Fischer 1266 circuit. Detector circuit aside - that's not the reason. What I wrote seems absurd ... Overall, the DEUS II is a far more efficient detector than this primitive garage . The reason for this seemingly absurd result is completely trivial... There are two reasons: a feature of the settlement and something else ...anyone with enough practice will guess

[Skippy]

Is is simply down to the coil ? Obviously a simple single-freq detector will allow a coil of 10 - 13cm / 4 - 5 inches , which is a good weapon in a trashy site; but also the choice of concentric or DD is good to have.
And we know the Deus2 is limited in coil size choices ( at the moment ) , and may never have a 10cm option. Whether concentric coils are technically possible or not, it is unlikely XP would manufacture them for the D2.

Do we assume the D2 was being used in multi-freq mode on this site? Trying out the single-freq mode(s) would be a good experiment.

[Riss]

Thanks for the opinion Skippy. After a few more comments (or if there are no others - after 2 weeks I will tell you all the details). It's good for others to give their point of view. Wireless probes have advantages, but also limitations... I doubt that the imbalance of the probe (as well as mechanical noises) caused by the circuit board and mainly by the battery does not allow the production of a wireless concentric probe by -smaller than about 30-35 cm. My experience with probes of the induction balance type is in the range from 15 cm concentric coplanar to 120 cm giant type DD - which operated at a frequency of about 800 hertz. Even if I had the technological power of the French, I would not make ,,wireless ‘‘one to use it in real conditions.

[ionut_mtb]

As an deus 1 user when it comes of detecting settlements i always use higher reactivity (3-5) because of the amount of iron found. But I’ve noticed that is not going deep, maybe because of packed soil and pottery. 11” coil that I use it is a downside and also limited frequency (4-18Khz). I think high frequency 9” coil is best for such areas. I have one damaged 9” hf (working but broken plastic side, wires exposed) and one good 9” lf but chattery. I wanted to build one small coil but no more free time, probably i will sell both on ebay. I would like to have one detector only for this type of sites. Some are using gpx 4500 but you dig a lot of iron. Better solution is one PI seconded by a vlf..

[Riss]

Is is simply down to the coil ? Obviously a simple single-freq detector will allow a coil of 10 - 13cm / 4 - 5 inches , which is a good weapon in a trashy site; but also the choice of concentric or DD is good to have.
And we know the Deus2 is limited in coil size choices ( at the moment ) , and may never have a 10cm option. Whether concentric coils are technically possible or not, it is unlikely XP would manufacture them for the D2.

Do we assume the D2 was being used in multi-freq mode on this site? Trying out the single-freq mode(s) would be a good experiment.

А banal situation - an average settlement from the Roman Empire, but the pollution with rusty wires (there were vineyards about 30 -50 years ago) is terrible. The XP DEUS II was operated with an 11" D28 FMF. Тhe garage detector is a 20 cm concentric coplanar - diameter of transmission coil about 18.5 cm. Тhe dimensions and narrow scanning field of the concentric coil are the reason for the significantly greater efficiency of the garage detector . The operator of XP DEUS II works mainly in multi-frequency mode, he tried all kinds of tricks, but ... still we have to take into account that the field configuration of the DD coil does not allow work in extremely polluted settlements ... Congratulations Skippy

[Skippy]

It's an honour to accept this award, but I have to thank my Agent, my Publicist, the Director, and all the Production Team for their help. It would be interesting to see what a Deus 1 with a small HF coil would do at this site. Higher freq ( 40kHz+ ) machines seem to have some ability to ignore small iron ... though they would be hot on unwanted targets, like coke ( part-burnt coal ), which could be a problem.

[Riss]

It's an honour to accept this award, but I have to thank my Agent, my Publicist, the Director, and all the Production Team for their help. It would be interesting to see what a Deus 1 with a small HF coil would do at this site. Higher freq ( 40kHz+ ) machines seem to have some ability to ignore small iron ... though they would be hot on unwanted targets, like coke ( part-burnt coal ), which could be a problem.

Oscar awards... Аnd yet - тests show that concentric probes have no competitor in heavily polluted areas. Тhe high operating frequency would improve the DD efficiency a bit, but... Тhe field configuration is why concentric probes have better discrimination (when the ground surface is flat) - they don't problem with beer caps .Оn the other hand DD are better on plowed areas and mineralization .unfortunately, concentric probes "iron" the deeper targets

[EL NINO]

Skippy, I crossed a similar terrain for checking with an ORX with a 9" hf coil at 31.3khz in the coin Fast program.. which was due to the stability of the detector on this terrain on the factory GB-88 / could rock/... I unmasked 3 small hamereds of which 2 from the previously detected area by other detectors, ...,,but ORX did not detect any other small, medium or large Roman coins...
...Another thing is also the number of detected and dug up iron as a good signal...which I didn't dig up before with other detectors...

Yes, a higher frequency can improve the unmasking of targets between iron... But it may not apply to all targets in general...

But I still take the use of high frequency as a good bonus... and I see the future in it... in the field of unmasking...

[Davor]

The waveform looks like an sum of square waves in T1:T2=1:3