Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
429User Manual 1175.6632.02 ─ 30
The carrier power is selected with "Carrier Power"; respectively the signal
power is displayed by "Signal Power".
●
"CW Interferer" mode
– "Reference Mode > Noise"
Sets the power of the interfering signal. The power of the carrier is derived from
the entered C/I value.
– "Reference Mode > Carrier"
Displays the power of the interfering signal. The power of the interfering signal
is derived from the entered C/N or S/N value. The carrier power is entered
under "Carrier Power".
Note: The noise signal is not generated arbitrarily for a particular bandwidth, but
instead it is generated in steps. Noise therefore also occurs outside the set system
bandwidth. The occurrence means that the total measurable noise power usually
exceeds the value displayed here. For correct measurement of the noise power within
the system bandwidth, we recommend that you measure the channel power with a sig-
nal analyzer.
See also Figure 6-3.
Remote command:
[:SOURce<hw>]:AWGN:POWer:NOISe on page 1096
Noise Power (Total Bandwidth)
Displays the power of the noise signal in the total bandwidth in "Noise Only" and "Addi-
tive Noise" mode.
See also Figure 6-3.
Remote command:
[:SOURce<hw>]:AWGN:POWer:NOISe:TOTal? on page 1096
Carrier + Noise Power, Signal + Noise Power (System Bandwidth), Carrier + Inter-
ferer Power, Signal + Interferer Power
In "Additive Noise" and "CW Interferer" mode, displays the overall power of the noise/
interferer signal plus useful signal.
The output selected with the parameter Show Powers For Output determines:
●
The name of this parameter
●
The units the overall power is measured in, dBm or dB (full scale)
Adding Noise to the Signal
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