Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
436User Manual 1175.6632.02 ─ 30
Settings:
State............................................................................................................................436
C/I................................................................................................................................436
Frame Duration........................................................................................................... 436
Pulses per Burst..........................................................................................................436
Pulse Spacing Minimum..............................................................................................436
Pulse Spacing Maximum.............................................................................................437
Eff. Burst Duration.......................................................................................................437
State
Enables or disables the impulsive noise generator.
If enabled, an AWGN signal using a pulse generator is applied.
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive[:STATe] on page 1182
C/I
Specifies the ratio of the wanted signal (C) to the impulsive noise signal (I).
Works like the "AWGN > Noise Power/Output Powers > Carrier/Noise Ratio" parameter
but only the noise power of an active pulse is considered. The applied noise power is,
however, lower. It corresponds to the number of pulses in a burst and the frame dura-
tion.
Note: If the AWGN generator and the impulsive noise generator are enabled simulta-
neously, the noise powers of the two sources are superimposed during the pulses.
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive:CI on page 1182
Frame Duration
Sets the time intervals at which the bursts occur.
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive:FRAMe on page 1183
Pulses per Burst
Sets the number of noise pulses per burst, where the maximum number of pulses is
calculated as Frame Duration/0.25 μs.
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive:PULSe on page 1183
Pulse Spacing Minimum
If more than 1 pulse per burst is enabled (Pulses per Burst > 1), this parameter sets
the minimum spacing between 2 pulses within a burst.
If Pulse Spacing Minimum = Pulse Spacing Maximum = 250 ns, the pulses directly
follow each other. You can set spacing with a resolution of 250 ns.
The minimum burst length that can be obtained is therefore as follows:
BurstLength
min
= Pulse Spacing Minimum * Pulses per Burst * 250 ns
Generating Impulsive and Phase Noise
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