Radio mode selectivity block for a detector for detecting a...

Details Radio mode selectivity block for a detector for detecting a... Radio mode selectivity block for a detector for detecting a...

2007-12-04

2007-12-04

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

C331S038000

Reexamination Certificate

active

11455788

ABSTRACT:
A radio mode selectivity block41for a detector1for detecting a buried current carrying conductor comprises a plurality of beat frequency oscillators53to center the bandwidth of detection of the detector1on target very low frequency (VLF) frequency bands. The frequencies of the beat frequency oscillators are chosen to fall within the VLF frequency bands used in a number of countries, so that the detector1can be used in radio mode in these countries without the need for local configuration.

REFERENCES:
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patent: 6617856 (2003-09-01), Royle et al.
patent: 6777923 (2004-08-01), Pearson
patent: 2 400 674 (2004-10-01), None
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patent: 2 412 738 (2005-10-01), None
patent: WO 03/069598 (2003-08-01), None
patent: WO 03/069769 (2003-08-01), None
patent: WO 03/071311 (2003-08-01), None

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