Configuring the Internal Baseband Source
R&S
®
SMW200A
298User Manual 1175.6632.02 ─ 30
– Signals calculated using a mathematical program such as MATLAB.
See Chapter 5.7.5, "Tags for Waveforms, Data and Control Lists", on page 327.
Irrespectively of the way they are created, you can load the externally generated
waveform files into the instrument via one of the available interfaces, e.g., USB or
LAN. Usually, the waveform file is saved on one of the network drives which are
accessible for the operating system.
Related settings
See:
●
Chapter 5.7.3, "ARB Settings", on page 301
Related step-by-step descriptions
See:
●
Chapter 5.7.4, "How to Create, Generate and Play Waveform Files", on page 311
●
Chapter 5.7.4.6, "How to Define Periodically Repeating Traces", on page 323
●
Chapter 5.7.4.5, "How to Manually Create a Waveform Using Tag File Format",
on page 318
●
Chapter 5.7.4.7, "How to Create a Control List Using Tag File Format",
on page 324
●
Chapter 5.7.4.8, "How to Create a Data List Using Tag File Format", on page 326
●
Chapter 5.7.4.9, "Editing Waveform Files, Data and Control Lists", on page 327
5.7.2.2 ARB Test Signals
The following test signals are available:
●
"Sine" test signal: Two sinewave signals with a selectable (but equal) number of
samples per period and equal frequencies. When the generation is triggered, the
number of samples per period, together with the frequency of the test signal, deter-
mine the ARB clock frequency: "Clock Frequency" = "Frequency" * "Samples per
Period".
Note: Because the resulting clock rate must not exceed the maximum ARB clock
rate (see data sheet), the number of sample values is automatically restricted
depending on the selected frequency.
The first sine signal is mapped on the I samples, the second on the Q samples.
The two signals differ by a selectable phase offset. For a –90 deg offset, the result
is a unit vector in the I/Q plane, rotating counter-clockwise and starting at I = 0, Q =
–1. For a 0 deg offset, the I and Q samples are on the diagonal of a unit square (I(t)
= Q(t)).
Using the Arbitrary Waveform Generator (ARB)
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