Programming instructions

RFI GLOBAL SERVICES LTD TEST REPORT
S.No. RFI/EMCE1/RP47590JD01A
Page 21 of 34
Issue Date: 04 October 2005
Test of: Psion Teklogix.
8530 Venicle Mount Computer.
To: 95/54/EC: 1995
ESA Approval Annex VII and Annex VIII, Emissions
8. Measurement Uncertainty
No measurement or test can ever be perfect and the imperfections give rise to error of measurement
in the results. Consequently, the result of a measurement is only an approximation to the value of the
measurand (the specific quantity subject to measurement) and is only complete when accompanied
by a statement of the uncertainty of the approximation.
The expression of uncertainty of a measurement result allows realistic comparison of results with
reference values and limits given in specifications and standards.
The uncertainty of the result may need to be taken into account when interpreting the measurement
results.
The reported expanded uncertainties below are based on a standard uncertainty multiplied by an
appropriate coverage factor, such that a confidence level of approximately 95% is maintained. For the
purposes of this document “approximately” is interpreted as meaning “effectively” or “for most
practical purposes”.
Measurement Type Range Confidence Level Calculated Uncertainty
Radiated Emissions:
Electric Field Strength
30 MHz to 1000 MHz @ 1 m 95% ±6.32 dB
The methods used to calculate the above uncertainties are in line with those recommended within the
various measurement specifications. Where measurement specifications do not include guidelines for
the evaluation of measurement uncertainty, the published guidance of the appropriate accreditation
body is followed.
05-Oct-2005