R&S ZVB - Page 378

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 363
figure measurement can include the effect of the image frequency of the first mixer stage, if so desired.
With these assumptions, the mixer noise figure measurement can be performed in close analogy to the
noise figure measurement for non-frequency-converting DUTs. A combination of the noise figure
measurement and the scalar mixer measurement is involved. The mixer noise figure setup guide gives
access to all necessary steps.
 Noise Figure Setup Guide opens a dialog which helps you perform all the necessary steps for a
noise figure measurement in the right order. All configuration and calibration dialogs for the noise
figure measurement can be accessed from the setup guide.
 Mixer Noise Figure Setup Guide opens a similar dialog for noise figure measurements on mixers
(with option R&S ZVA-K31).
 Define Noise Figure Meas... provides basic parameters for the noise figure measurement. Open
this dialog to modify the definitions of the setup guide.
 Noise Figure Cal... opens a dialog to assess and compensate the internal noise at the NWA
receiver and source. Open this dialog to modify the calibration procedure of the setup guide.
 Correction Off (de)activates the noise figure calibration for the active channel.
Basic Test Setup and Noise Figure Calculation
The schematic test setup for a noise figure measurement is shown below.
The NWA source provides a superposition of a CW signal and a noise signal. The latter generally consists
of the thermal noise N
T, 1
and a possible additional contribution ΔN:
P
Noise, 1
= N
T, 1
+ ΔN