It is funny though, Whites still produce the Sierra Madre (SL) metal detector and it has the analog meter on it with a different face plate than the XL Pro, and the small body like the XL Pro, it looks as if it is an analog detector.. without the discrimination circuit. ( Kellyco has them on there web page) and Whites shows them as a specialty detector.
Could Whites being telling us a story or a small lie about having to do away with the analog detector???? it is all in marketing and demand in the end... Most like the new digital meters and assume they are better as they do not know the difference when buying new... New sales more than likely dropped of on the XL Pro over the years do to the newer digital units and demand.
Most starting out in detecting have no idea how good the XL Pro or 6000 series detector where and like it when a coin picture, pull tab picture, ring picture pop up on the screen to tell them whats in the ground only to find out later that is not always the case not realizing how accurate the analog needle type meters can be. Do not get me wrong as I do like the digital meter on my M6 and the other Whites detectors I have had, but I still feel the analog needle meter is more accurate in field use.
In my opinion I do believe this was some of the driving factor in doing away with the XL Pro or 6000 series detectors.
Below is a post from the Tesoro forum a years or so ago about this very subject, It was written by a well known player in the industry,or detector design Engineer about analog detector technology.
Take care,
Bill G
(Quote about analog technology Below )
Everything in the real world is analog. Time, Temperature, Speed, Sound, Etc, Etc. It was a big jump when man figured out how to digitize these functions, and it may help in some number crunching operations to do them digitally versus in analog form. This is due to the finite range of digital numbers. The amount of resolution in a digital system can be fixed at some arbitrary number. An eight bit digital word yields resolution of 1 part in 255. A sixteen bit word yields resolution of 1 part in 65,535. An eight bit system is easier to develop than a 16 bit, but may not yield the desired accuracy. The choice of word length used by the digital system will determine its accuracy and resolution. Analog is always infinite. With microprocessors, it is easier to do some mathematical functions, such as division and multiplication digitally. Both analog and digital have their benefits as well as their drawbacks. A smart designer will use the proper format to achieve the best performance from his design.
The way analog circuitry is built does not differ from the way digital circuitry is built. The quote made by another manufacturer
Quote:
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By 2007, just about all original analog designs will be