R&S ZVA-Z75 Manual De Instrucciones página 52

®
R&S ZVA-Z75, -Z90, -Z110, -Z140, -Z170, -Z220, -Z325, -Z500
tion of the reference receiver (a-wave) using an appropriate external power meter is
possible for all converters and recommended.
A source power calibration for a frequency converter requires an appropriate external
power meter, to be connected to the converter's waveguide flange; see
"Test Port Adapter (Waveguide
figured in the ordinary way using the "System Configuration > External Power Meters"
tab.
To perform the source power calibration, proceed as follows:
1. Connect the waveguide power meter and open the "Channel > Calibration > Start
Power Cal > Source Power Cal" dialog.
2. Select your converter and source port from the "Source" pull-down list (e.g. "Conv
1" for a frequency converter connected to NWA port 1).
3. Click "Modify Settings" and ensure that both "Flatness Cal" and "Reference
Receiver Cal" are checked.
4. Set "Convergence Factor" in the "Source Power Cal Settings" subdialog to 0.3.
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".
Getting Started 1307.7039.62 ─ 11
Flange)",
site).
on page 6. Waveguide power meters are con-
R&S®ZVA-Z Millimeter-
Basic Operation
Calibration
Chapter 2.1,
21