R&S ZNB Series User Manual page 417

®
R&S ZNB/ZNBT
Start Power / Stop Power
Defines the sweep range for
Remote command:
SOURce<Ch>:POWer<PhyPt>:STARt
SOURce<Ch>:POWer<PhyPt>:STOP
Step Attenuators
Defines an attenuation factor for the received waves at each analyzer port. At least one
receiver step attenuator must be installed to use this feature; see
"Receiver step
Receiver step attenuators are used to adapt the received signal level to the input level
range of the analyzer. They protect the instrument from being overloaded or damaged,
e.g. if the DUT is a power amplifier.
Attenuation factors are port- and channel-specific. Possible values are 0 dB to 30 dB in
steps of 10 dB. The analyzer rounds any entered value below the maximum attenua-
tion to the closest step.
Note: Receiver step attenuators are optional hardware (see
step
If the number of test ports (on the VNA and connected switch matrices) is higher than
4, the "Step Attenuators" input fields are hidden. They are replaced by a "Step Attenua-
tors..." button that opens the following dialog:
Remote command:
[SENSe<Ch>:]POWer:ATTenuation
RF Off All Channels
"RF Off All Channels" switches the internal power source for all channels off (if
checked) or on. Switching off the RF power helps to prevent overheating of a connec-
ted DUT while no measurement results are taken.
Tip: Switching off the internal RF sources while an external generator is used can
improve the measurement accuracy. "RF Off All Channels" also deactivates external
generators, so you have to use the settings in the "Arb Frequency" tab of the
tings dialog
Remote command:
OUTPut<Ch>[:STATe]
User Manual 1173.9163.02 ─ 62
attenuators",
attenuators", on page 261).
(with option R&S ZNB/ZNBT-K4).
Power sweeps.
on page 261.
GUI reference
Stimulus softtool
Chapter 4.7.23,
Chapter 4.7.23, "Receiver
Port Set-
417