Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMBV100B
268User Manual 1178.4460.02 ─ 03
The dialog confirms the required mean power of the interfering signal "Noise Power
(System Bandwidth) = -82.5 dBm".
3. Select "AWGN > General > State > On".
To generate a CW interfering signal
For the following example, we assume that two interfering signals are required, a 5
MHz uplink LTE signal and a CW signal. The signals are transmitted at -52 dBm; the
LTE signal at 1.96 GHz and the CW signal 10 MHz below it. Signals with equal (or sim-
ilar) RF levels and at frequencies spaced within the max. RF bandwidth can be gener-
ated by the same path.
To configure the instrument:
1. Enable the required LTE signal:
a) Select "EUTRA/LTE > General Uplink Setting > Channel Bandwidth = 5 MHz"
and "EUTRA/LTE > State = On"
b) Select "Status bar > Frequency = 1.96 GHz" and "Level = -52 dBm"
2. Enable the required interfering signal:
a) Select "AWGN > General > Mode > CW Interferer"
b) Select "Target CW Frequency Offset = 10 MHz"
c) Select "Noise Power/Output Results > Reference Mode = Noise"
d) Select "Interferer Power = -52 dB"
e) Select "AWGN > General > State > On".
3. Select "RF > State > On"
Adding Noise to the Signal
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