Anritsu 37 C Series, Operation Manual, Page: 150 / 603

LRL/LRM Calibration
(Microstrip) Microstrip is a dispersive media. The 37XXXC applies dispersion com-
pensation during calibration for microstrip measurements. Because
the 37XXXC must know the specific microstrip parameters, during the
calibration procedure menus are available for entering the
·
width of the strip
·
thickness of the substrate
·
substrate dielectric constant
·
effective dielectric constant Zc
·
characteristic impedance (reference)
When testing microstrip devices it is necessary to launch from coax to
microstrip. In production testing this launching must be temporary, so
that the device can easily be installed in and be removed from the
fixture. The requirement for launching to 65 GHz is met by the
ANRITSU Universal Test Fixture (UTF). The UTF provides accurate,
repeatable launch to substrates from 5 to 70 mils thick, and from 0.15
to 2 inches long. Offset connections and right angles can be configured.
DC bias probes can be mounted to the UTF to inject bias onto the sub-
strate. UTF calibration/verification kits are available for alumina in
10 mil, 15 mil, and 25 mil microstrip, and for 25 mil coplanar wave-
guide. Although a UTF is not essential, the following calibration pro-
cedures presume its use.
Step 1. Select the desired LRL line substrates from the ap-
propriate microstrip calibration kit. When called for
in the calibration sequence, mount the LRL line sub-
strates on the UTF following the procedure given in
the 3680 OMM.
Step 2. Press the Begin Cal key.
37XXXC OM 7-33
MEASUREMENT CALIBRATION LRL/LRM CALIBRATION
Apply
Cal
Begin
Cal