Measurement - Rohde & Schwarz ZVA-Z90E Handbuch

®
R&S ZVA-Z90E / -Z110E
5. Start the calibration sweep.
If a precise flatness calibration over frequency and power is needed, use the R&S ZVA
Frequency Converter Levelling Tool (Free download from the
Wave Converters
A receiver power calibration of the reference channel (a wave) is always possible if an
appropriate external power meter is available. With a calibrated reference receiver, all
measurement receivers (b waves) can also be power calibrated. This provides abso-
lute power measurement capability for all wave quantities. Proceed as follows:
1. Ensure that the output power of the frequency converter is not attenuated; adjust
the adjusting screw (knurled knob) at the top of the converter to 2 mm.
2. Connect the waveguide power meter to the converter's waveguide flange and open
the "Channel > Calibration > Start Power Cal > Source Power Cal" dialog.
3. Click "Modify Settings" and disable "Flatness Cal", leaving "Reference Receiver
Cal" checked.
4. Start the calibration sweep via button "Take Cal Sweep". Wait until the "Finished"
message appears.
5. Disconnect the power meter and connect the measurement receiver instead. Then
open the "Channel > Calibration > Start Power Cal > Receiver Power Cal..." dialog.
6. Select the wave quantity to be calibrated and the source port that you have calibra-
ted in steps 1...4.
7. Start the calibration sweep via button "Take Cal Sweep".
To ensure an accurate source power calibration and quick convergence, use the cor-
rect power coefficients; see
A receiver power calibration of the b-waves (without external power meter, using the
Receiver Power Calibration dialog) is also possible .
After the power calibration procedure a system error correction is recommended. Due
to the physical properties of the mm-waves and the waveguides, measurements with
frequency converters require a special calibration kit for system error correction. Rohde
& Schwarz offers kits for this purpose, e.g. the calibration kits R&S ZV-WR10 and
R&S ZV-WR12. The standards in the calibration kit allow all one-port and two-port cali-
bration types supported by the network analyzer except TNA. Refer to the documenta-
tion of the calibration kit or the help system of your network analyzer for details.

3.8 Measurement

After power calibration and system error correction, the mm-wave measurement can
be performed like any other network analyzer measurement. The analyzer may per-
form a frequency or power sweep. The "Port Configuration" settings (together with the
Getting Started 1307.7197.62 ─ 08
site).
Chapter 3.7,
R&S®ZVA-Z Millimeter-
"Calibration", on page 23.
Basic Operation
Measurement
24