Concepts and Features
R&S
®
ZNB/ZNBT
118
User Manual 1173.9163.02 ─ 53
●
The receivers and generators can be freely assigned, but without reusing the same
(original) physical port in different (redefined) ports.
●
Redefining physical ports causes a reset and deletes all switch matrix RF connec-
tions
This can be used to insert external components (e.g. external signal separating devi-
ces, power amplifiers etc.) into the signal path to develop custom measurements, e.g.
to test high-power devices and extend the dynamic range.
Amp
Ext
Gen 1
VNA
2
1
Dual
Directional Coupler
DUT
Redefined Physical Port 1
a wave: b
1
b wave: b
2
Source: Ext Gen 1
Figure 5-4: Redefined physical port 1 (port 2 not used)
Amp
VNA
3
2
coupler
DUT
Redefined Physical Port 1
a wave: b
2
b wave: b
3
Source: Port 1
Redefined Physical Port 2
a wave: a
4
b wave: b
4
Source: Port 4
1
4
Figure 5-5: Two redefined ports
High Signal Power
When dealing with external signal amplification, make sure that:
●
the signals fed to the analyzer are within the allowed range
●
during calibration the calibration standards meet the requirements in terms of their
power handling capacity
Attenuator pads can be used to adapt the power levels.
Measurement Results
