R&S ZVB - Page 435

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 420
In order to use ALC, in the Define Intermodulation Distortion Meas wizard set Two Tone
Output to Ext Dev.
 Hot S parameter: Hot S22 is a measurement on 2-port DUTs, typically power amplifiers. At the
DUT's "out port" 2 reflection S22 is measured, while at the same time the DUT is stimulated at its
"in port" 1. Because the stimulus frequencies at ports 2 and 1 must be different (which is not
possible for analyzers with only two independent sources), ports 1 and 3 are combined in this
configuration.
The frequencies for ports 1 and 2 must be set in the Port Configuration dialog.
For Hot S11 the same logic applies, but with exchanged port numbers.
Config. options: Power Amp
Note that the input power at the analyzer must not exceed 27 dBm; excessive input power -
up to the damage level of 43 dBm at the extension unit - must be compensated by adequate
attenuators looped into the User Src and User Meas path extensions (at least 16 dB if an input
level of +43 dBm is actually possible). In addition, the compression level of the analyzer's
receivers has to be taken into account (see the data sheet for details).
 Noise Figure NF21 (NF12): configuration suitable for a noise figure measurement with port 1
(port 2) as the source and port 2 (port 1) as the receive port. The LNA at the receive port is
activated automatically and its built-in filters are controlled by the analyzer firmware,
compensating for the effects of the harmonic mixing used by the ZVA above 24 GHz. This
enables continuous sweeps from 10 MHz to 50 GHz. See Rohde & Schwarz application note
1EZ61 for background information.
Pulse modulators and power amps are not supported in this configuration.
The input level at the receive port should not exceed -30 dB (-40 dBm at User Meas);
otherwise the LNA will run into compression. The damage input level is +5 dBm at the port. For
details see the R&S ZVAX-TRM data sheet.
 Manual: Free activation/deactivation of all modules (pulse modulators, power amplifiers,
combiners, low-noise preamplifiers, user paths).
Config. options: -
 Pulsed (config. option): enables the pulsed measurement mode (activates the pulse modulators)
for the selected configuration
 Power Amps (config. option): enables the power amplifiers for the selected configuration
 Prepare for ALC (config. option): prepares for ALC by selecting the a-wave access before the
pulse modulator for the selected configuration. Only takes effect, if Pulsed is also selected.
To configure and enable ALC, go to the ALC Config dialog.
To change a module's state, simply click its graphical representation. This will automatically activate the
Manual configuration mode.
Remote control:
[SENSe<Ch>:]TEUNit:AMONitor
[SENSe<Ch>:]TEUNit:COMBiner[:STATe]
[SENSe<Ch>:]TEUNit:PAMPlifier[:STATe]
[SENSe<Ch>:]TEUNit:PMODulator[:STATe]
[SENSe<Ch>:]TEUNit:UMEas[:STATe]
[SENSe<Ch>:]TEUNit:USOurce[:STATe]