Rohde & Schwarz SMBV100B - Page 418

Monitoring Signal Characteristics
R&S
®
SMBV100B
416User Manual 1178.4460.02 ─ 03
FFT Length..................................................................................................................416
Full Scale (dBFS)........................................................................................................416
Trigger Source.............................................................................................................416
Sample Rate Mode..................................................................................................... 417
Sample Rate............................................................................................................... 417
Add..............................................................................................................................417
Apply Changes............................................................................................................417
Remove.......................................................................................................................418
Graphical Diagrams Table
The active graphical signal displays are listed in the table at the top of the dialog.
Mode
Determines the graphics mode, see Chapter 7.1, "Displaying Baseband Signal Charac-
teristics in Real-Time", on page 407.
Remote command:
[:SOURce<hw>]:BB:GRAPhics:MODE on page 807
Source
Defines the signal acquisition point, see Chapter 7.1.2.2, "Signal Acquisition Points",
on page 412.
Remote command:
[:SOURce]:BB:GRAPhics:SOURce on page 808
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 809
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 809
Trigger Source
Defines the trigger for signal recording.
Displaying Baseband Signal Characteristics in Real-Time