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To connect the unit...
1. Switch on and start-up your network analyzer.
2. Wear a grounded wrist strap; see
ESD Protective Measures
on the previous page.
3. Connect the USB type A connector of the USB cable to any of the USB type A
connectors on the front or rear panel of the analyzer. You can also connect the
unit before switching on the analyzer.
4. Wait until the operating system has recognized and initialized the new hardware.
When the unit is connected for the first time, this may take longer than in normal
use.
The unit is ready to be used as outlined below.
Performing an Automatic Calibration
After connection and initialization, you can use the calibration unit as follows:
1. Connect n analyzer ports (n = 1 to 4, depending on your analyzer and calibration
unit model and the number of ports to be calibrated) to n arbitrary ports of the cali-
bration unit. Terminate all unused ports (no. n + 1 to 4) with a 50 match.
2. Perform the automatic calibration for the selected number of ports using the
Measurement Wizard
or the
Start Calibration
menu (R&S
®
ZVA/B/T analyzers) or
the
Calibration Unit
wizard (R&S
®
ZNB/C analyzers). For details refer to your ana-
lyzer’s help system.
3. Remove the test cables from the unit, connect your DUT instead and perform cali-
brated measurements.
Accuracy Considerations
To ensure an accurate calibration, please observe the following items:
•
Unused ports of the calibration unit must be terminated with a 50 match.
•
No adaptors must be inserted between the calibration unit and the test ports.
•
After connecting the unit to the USB port, allow for a sufficient warm-up time (see
data sheet) before starting the calibration.
•
To ensure best accuracy the analyzer automatically reduces the source power to
–10 dBm. If the test setup contains a large attenuation, deactivate
Automatic
Power Reduction for Calibration Unit
in the
Calibration
tab of the
System Con-
fig(uration)
dialog and ensure an input power of –10 dBm at the ports of the cali-
bration unit (please also refer to the data sheet).
The calibration type depends on the number of ports and of the analyzer type. If a
single port is calibrated, the analyzer uses a reflection calibration type (e.g.
Port / Refl OSM)
. For 2 and more ports, you can choose among several calibration
types.