Rohde & Schwarz R&S SMW200A - How to Configure the Noise Generator for Receiver Tests

Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
430User Manual 1175.6632.02 ─ 30
See also Figure 6-3.
Remote command:
[:SOURce<hw>]:AWGN:POWer:SUM? on page 1096
Carrier + Noise PEP, Signal + Noise PEP (Total Bandwidth), Carrier + Interferer
PEP, Signal + Interferer PEP
In "Additive Noise" and "CW Interferer" mode, displays the peak envelope power (PEP)
of the overall signal comprised of noise 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)
Note: The peak envelope power ("PEP") displayed in the "Status bar" corresponds to
the PEP value of the carrier.
Remote command:
[:SOURce<hw>]:AWGN:POWer:SUM:PEP? on page 1097
Noise Bandwidth
For "Additive Noise" and "Noise Only" modes and with activated AWGN generator,
indicates the real noise bandwidth.
See also Figure 6-2.
Remote command:
[:SOURce<hw>]:AWGN:BWIDth:NOISe? on page 1094
Resulting CW Frequency Offset
In "CW Interferer" mode, indicates the resulting frequency offset of the sine wave.
Remote command:
[:SOURce<hw>]:AWGN:FREQuency:RESult? on page 1098
6.2.5 How to Configure the Noise Generator for Receiver Tests
This section shows you how to configure the noise generator for receiver tests, for
example the tests specified in the 3GPP test specification TS 36.141, chapter 7.
For the following example, we assume that the R&S SMW generates an uplink
EUTRA/LTE signal with following characteristics:
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"EUTRA/LTE > Duplexing = FDD", "Link Direction = Uplink"
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"EUTRA/LTE > General Uplink Setting > Channel Bandwidth = 5 MHz" and "Occu-
pied Bandwidth = 4.5 MHz"
●
"EUTRA/LTE > Frame Configuration > UE1 > FRC > FRC State = On" and "FRC =
TS 36.141: A2-3"
●
"EUTRA/LTE > State = On"
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"Status bar > Frequency = 1.95 GHz" and "Level = -69.9 dBm"
●
"RF State > On"
Adding Noise to the Signal