Concepts and features
R&S
®
ZNA
260
User Manual 1178.6462.02 ─ 20
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Controlled timing is limited to setups with a single channel.
●
Controlled timing is not compatible with:
–
ALC
–
spectrum measurements
–
two-dimensional compression point measurements
–
phase coherent and true differential signal generation
–
external devices control via USB or LAN (power meters, generators)
–
RFFE usage
4.7.11
Noise figure measurement
Option R&S
ZNA-K30
Software option R&S
ZNA-K30 allows you to measure the noise figure of a 2-port DUT,
operating in its linear range.
Currently, this option is only available for R&S
ZNA26 and R&S
ZNA43.
Noise figure (or
noise factor
, if the linear representation is chosen) is an important fig-
ure of merit for system designers and eventually determines the overall system perfor-
mance of a receiver.
Figure 4-27: Exemplary spectrum for a single tone excitation (left = DUT input; right = DUT output)
The general definition of the noise factor
F
D
is the ratio of the signal to noise ratio
(SNR) at the input, to the SNR at the output of a DUT. In other words, it describes the
degradation of the SNR from the input to the output of a DUT.
Figure 4-28: Schematic showing the signal and noise powers relevant for noise figure calculations
Optional extensions and accessories
