User's Manual

GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 35 of 79
7.3.2. 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 GL865 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: