Dubious Posted January 23, 2019 Share Posted January 23, 2019 18 hours ago, EL NINO77 said: Equinox .. : Patent :US7432715 , US7579839....Minelab says in the patent that Tx emits from 2.5kHz-80khz - but the RX side receives frequencies from 5khz to 40khz and all over 40khz is filtered ... A few days ago I made measurements and compared all Equinox programs on Old 1.5.0 and New 1.7.5. Firmware, So soon to publish it ...I have also scanned the frequency of 5,10,15,20,40kHz .... With patents, the game is usually to "stake" as much territory as you can by making the claims as broad as can be successfully prosecuted. That is, while gadget may faithfully represent the patented invention reduced to practice, that does not mean that the gadget embodies the full extent of the patented invention and claims. Here, it seems as though the "multifrequency" claims of patent US7432715B2 would apply to use of two or more frequencies: "In one embodiment, the metal detector generates two or more frequencies sufficiently different of each other so that effective ground rejection and target discrimination/identification become possible (multiple frequency metal detector)." 1 Link to comment Share on other sites More sharing options...
EL NINO77 Posted January 23, 2019 Share Posted January 23, 2019 For comparison, I take measurements from the Whites Spectra V3 Detector: Spectra V3: 3F -multi -TX normal.. Spectra V3: 3F-multi- TX bost ON... 2 Link to comment Share on other sites More sharing options...
EL NINO77 Posted February 10, 2019 Share Posted February 10, 2019 MarkG has done very good work ....for what I also want to thank 1 Link to comment Share on other sites More sharing options...
Steve Herschbach Posted February 10, 2019 Share Posted February 10, 2019 Mark did a fabulous job. Since I am not worried about the frequency stuff what I learned is that the Noise Cancel numbers do exactly the opposite of what I would have assumed. Pushing noise cancel numbers lower pushes the frequency higher. Usually these shifts are trivial to performance, but in a “no-EMI” location you could set the Noise Cancel as low as possible to optimize a high frequency like 40 kHz and as high as possible to optimize the single low frequency options like 5 kHz. I doubt there is a measurable effect on performance but it might lend a psychological boost that does help at times. 4 Link to comment Share on other sites More sharing options...
flakmagnet Posted February 11, 2019 Share Posted February 11, 2019 Wow, that's interesting. Detecting has so much to do with psychology. 3 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now