Users Manual

PDP User’s Guide Appendix C:Instrument Interference
C-1
Instrument Interference
Immunity regulations place the onus on instrument/apparatus/device
manufacturers to assure that extraneous interference will not unduly cause an
instrument/apparatus/device to stop functioning or to function in a faulty manner.
Based on independent testing house measurements, Sensors & Software Inc.
systems comply with such regulations in Canada, USA, European Community and
most other jurisdictions. GPR devices can sense electromagnetic fields. External
sources of electromagnetic fields such as TV stations, radio stations and cell
phones, can cause signals detectable by a GPR which may degrade the quality of
the data that a GPR device records and displays.
Such interference is unavoidable but sensible survey practice and operation by an
experienced GPR practitioner can minimize such problems. In some geographic
areas emissions from external sources may be so large as to preclude useful
measurements. Such conditions are readily recognized and accepted by the
professional geophysical community as a fundamental limitation of geophysical
survey practice. Such interference being present in the GPR recordings is not
considered as an equipment fault or as a failure to comply with immunity
regulations.