System Handbook

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D1750V2, serial no. 1112 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>
D1750V2 – serial no. 1112
1750MHZ
Date of Measurement Return-Loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary Impedance (ohm) Delta (ohm)
03.07.2019
(Cal. Report)
-32.991 48.814 -1.8705
03.06.2020
(extended)
-33.589 1.81 48.573 0.241 -4.0211 2.1506
03.05.2021
(extended)
-32.468 -1.59 47.979 -0.835 -1.4741 -0.3964
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.