6-31
Calibrating for Increased Measurement Accuracy
Full Two-Port Error Correction (ES Analyzers Only)
14.Make a "thru" connection between the points where you will connect your device under
test as shown in Figure 6-9.
NOTE Include any adapters or cables that you will have in the device m easurement .
That is, connect the standard device where you will connect your DUT.
NOTE The thru in most calibration kits is defined with zero length. The correction
will not work properly if a non-zero length thru is used, unless the calibration
kit is modified to change the defined thru to the length used. This is
important for measurements of non-insertable devices (devices having ports
that are both male or both female). The modified calibration kit must be
saved as the user calibration kit, and must be selected before the
calibration is started.
15.To measure the standard, when the trace has settled, press:
The analyzer underlines the softkey label after it makes each measurement.
16.Press and select from the following two options:
❏If you will be measuring devices with a dynamic range less than 90 dB, press:
❏If you will be measuring devices with a dynamic range greater than 90 dB, follow
these steps:
a. Connect impedance-matched loads to PORT 1 and PORT 2. Include the adapters
that you would include for your device measurement.
NOTE If you will be measuring highly reflective devices, such as filters, use the test
device, connected to the reference plane and terminated with a load, for the
isolation standard.
b. Activate at least four times more averages than desired during the device
measurement.
NOTE If loads can be connected to both port 1 and port 2 simultaneously, then the
following step can be performed using the softkey.
c. Press
.
d. Return the averaging to the original state of the measurement, and press
.
USER KIT
DO BOTH FWD+REV
ISOLATION
OMIT ISOLATION
DO BOTH FWD + REV
Cal
RESUME CAL SEQUENCE
ISOLATION
FWD ISOL’N ISOL’N STD
ISOLATION DONE
Cal
RESUME CAL SEQUENCE