Rohde & Schwarz R&S SMW200A - Phase Noise Settings

Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
437User Manual 1175.6632.02 ─ 30
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive:MINSpace on page 1183
Pulse Spacing Maximum
If more than 1 pulse per burst is enabled (Pulses per Burst > 1), this parameter sets
the maximum spacing between 2 pulses within a burst.
The max pulse spacing depends on the number of pulses per burst and is calculated
as follows:
Pulse Spacing Maximum ≤ Frame Duration/(Pulses per Burst - 1)
Thus, a burst can maximally take the length of a frame.
The maximum burst length that can be obtained is therefore as follows:
BurstLength
max
= Pulse Spacing Maximum * Pulses per Burst * 250 ns
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive:MAXSpace on page 1183
Eff. Burst Duration
Displays the time during which the noise generator is active in a frame. The duration is
the product of the number of pulses per burst and the pulse duration of 250 ns. An
equivalent C/N
e
can thus be calculated as follows:
C/N
e
= C/I* ("Eff. Burst Duration"/Frame Duration)
Remote command:
[:SOURce<hw>]:NOISe:IMPulsive[:BURSt]:DURation? on page 1183
6.3.5 Phase Noise Settings
You can generate impulsive noise in the following configurations:
●
Option: R&S SMW-B10
"System Config > Fading/Baseband Config > Mode = Standard"
●
Option: R&S SMW-B9
– "System Config > Fading/Baseband Config > Mode = Standard" with "Signal
Outputs = Analog Only"
– "System Config > Fading/Baseband Config > Mode = Advanced".
For more information, see data sheet.
Access:
1. Select "AWGN > Config > Phase Noise".
2. Select "Phase Noise > State > On".
3. To use one of the predefined single-sideband shape profile, select "Load Profile >
Predefined Files".
For description of the file format, see "About the single sideband shape profiles"
on page 434.
4. In the "Phase Noise" table, set the phase noise characteristics.
Generating Impulsive and Phase Noise