Vector Network Analysis
R&S
®
ZNH
158
User Manual 1334.5985.02 ─ 02
For more information, see
Chapter 7.2.3.4, "Setting the Reference Position"
8.3.2.3
Defining the Display Range
Changing the display range of the R&S
ZNH modifies the value of the vertical axis of
the measurement diagram of the selected trace.
For more information, see
Chapter 7.2.3.2, "Defining the Display Range"
8.3.2.4
Adjusting the Vertical Axis Automatically
Automatic scaling of the vertical axis
All measurement formats except the Smith chart feature an automatic scale function.
If you use automatic scaling, the R&S
ZNH automatically sets the display range in a
way that the trace best fits on the display.
For more information, see
Chapter 7.2.3.3, "Adjusting the Vertical Axis Automatically"
8.3.2.5
Setting the Port Power and Receiver Attenuation
You can configure the "Port Power" to transmit a suitable signal source power into the
DUT. Value can be adjusted from -25 dBm to 0 dBm in step of 1 dB. See also
the output level of the test port power (tracking generator)"
Beside adjusting the signal source power, you can adjust the receiver step attenuators
to adapt the receiver signal level to the input level range of the analyzer. This helps to
protect the instrument from bring overloaded or damaged, i.e. if the DUT is a power
amplifier. Attenuator factors are from 0 dB to 15 dB in steps of 5 dB.
1. Press the [SCALE/AMPT] key.
2. Select the "Port Config" softkey.
The R&S
ZNH opens a submenu to specify the power setting.
● "Port Power": Signal source power of the selected driving port setting.
● "Rcv Attn Port1": Receiver step attenuator for port 1.
● "Rcv Attn Port2": Receiver step attenuator for port 2.
● "RF Off": Signal source is turned off.
3. The R&S
ZNH displays an input field for signal source and receiver step attenuator
settings.
To turn off the signal source power, select "RF Off" from the menu item.
Configuring Vector Network Analysis