Monitoring Signal Characteristics
R&S
®
SMW200A
570User Manual 1175.6632.02 ─ 16
Mode
Determines the graphics mode, see Chapter 8.1, "Displaying Baseband Signal Charac-
teristics in Real-Time", on page 559.
Remote command:
[:SOURce<hw>]:BB:GRAPhics:MODE on page 1016
Source
Defines the signal acquisition point, see Chapter 8.1.2.2, "Signal Acquisition Points",
on page 565.
External digital baseband signals fed via the FADER connectors cannot be monitored.
Remote command:
[:SOURce]:BB:GRAPhics:SOURce on page 1017
Mux Stream
In "System Configuration > Signal Outputs > Digital Only Multiplexed" mode, selects
which of the multiplexed streams is monitored and displayed.
Remote command:
[:SOURce]:BB:GRAPhics:SOURce:MUX on page 1018
FFT Length
In "Mode > Power Sepectrum", selects the number of samples to be included in the
graph of the power spectrum.
Remote command:
[:SOURce]:BB:GRAPhics:FFTLen on page 1018
Full Scale (dBFS)
In "Mode > Power Spectrum", determines the normalization of the power values in the
diagram.
Observe the change in the units on the y-axis.
"On"
The maximal digital power |I|=|Q|=max is mapped to 0 dB in the
power spectrum diagram.
The y-axis shows the normalized power in dBFS.
"Off"
The frequency average of the displayed power (frequency domain)
agrees with the average power in the time domain.
The y-axis shows the power distribution in dB/Hz.
Remote command:
[:SOURce]:BB:GRAPhics:FFTFscale on page 1018
Trigger Source
Defines the trigger for signal recording.
"Software"
Recording of signals starts automatically in predefined intervals.
This asynchronous method is suitable if a representative display of
the complete signal is required.
Displaying Baseband Signal Characteristics in Real-Time
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