Quote:
Originally Posted by mikebg
The device in posting # 64 is model APEX MKI. It is like Geonics EM15, designed by Vaino Ronka.
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Thank you mikebg, APEX is not known to me. I think it was EM15.
Quote:
Originally Posted by mikebg
However if you swing search head one or two times pro seconde, the GND signal will be modulated by frequency 1 or 2Hz. This is in target spectrum.  |
Not only ULF modulation because of swinging, but because of handshaking too, a lot of parasitic modulations that suppress target signal.