User's Manual

HE910 Hardware User Guide
1vv0300925 Rev.28 – 2015-06-24
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 47 of 47
6.6.2 Transmission line measurements
HP8753E VNA (Full-2-port calibration) has been used in this measurement session. A calibrated
coaxial cable has been soldered at the pad corresponding to RF output; a SMA connector has
been soldered to the board in order to characterize the losses of the transmission line including
the connector itself. During Return Loss / impedance measurements, the transmission line has
been terminated to 50 Ω load.
Return Loss plot of line under test is shown below: