System Handbook
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D750V3, serial no. 1107 Extended Dipole Calibrations
Referring to KDB 450824, if dipoles are verified in return loss (<-20dB, within 20% of prior calibration), and in
impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration
interval can be extended.
<Justification of the extended calibration>
D750V3 – serial no. 1107
750MHZ
Date of Measurement
Return-Loss (dB)
Delta (%)
Real Impedance (ohm)
Delta (ohm)
Imaginary Impedance (ohm)
Delta (ohm)
03.08.2019
(Cal. Report)
-25.726 55.219 -1.5455
03.07.2020
(extended)
-25.760 0.13 59.446 -4.227 -3.2169 1.6714
03.06.2021
(extended)
-25.193 -2.07
54.014 1.205 1.2258 -2.7713
The return loss is < -20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration.
Therefore the verification result should support extended calibration.