During the calibration process the instrument is placed in a linearly polarized (EM) field, approximating a plane wave. The axis of the probe is placed parallel to the direction of propagation and aligned with the antenna bore sight.
The field is rotated about the probe axis to determine the average sensitivity and to ensure that the ellipse response falls within the +/-1dB tolerance.
The actual power flux density at the point of reference (assumed to be 50mm behind the probe spacer tip) is then determined.
All instruments are calibrated prior to despatch at a single cardinal point of 5mW/cm2 and the calibration factor is set to ensure the displayed average ellipse response of the instrument is centred upon the 5mW/cm2 standard signal.
All measurements are traceable to the UK National Physical Laboratory
The TX2000 is provided with two small switches located on the left hand side of the battery and and two photo-sensors located on the right hand side accessible beneath the battery cover. These items form part of the calibration arrangement used to enable the calibration mode and to adjust the calibration factor durinf calibration
The setting of the switches and the sequence in which they are operated is important.
The switches should not be adjusted unless a competent technician is to perform a calibration procedure. Improper use may lead to changes within the calibration factor and subsequent inaccuracy.
Details of the procedure to be used for calibration may be obtained by contacting Celtek Electronics Ltd on +44(0)161 282 9615 or by e-mail via email@example.com
To arrange for a calibration price, please contact Celtek Calibration Ltd
Tel: +44(0)1253 820200 e-mail: firstname.lastname@example.org