Rohde & Schwarz R&S SMW200A - Page 313

Configuring the Internal Baseband Source
R&S
®
SMW200A
313User Manual 1175.6632.02 ─ 30
To create an AWGN test signal, see Chapter 5.8.4, "AWGN Test Signal", on page 349.
5.7.4.2 How to Create Waveform Files with the Built-In Generate Waveform File Function
Several digital standards provide the special function "Generate Waveform File". This
function enables the calculation and storage of the signal as a waveform file that can
be afterwards played by the ARB generator.
To generate an EUTRA/LTE waveform file
1. Select "Baseband > EUTRA/LTE/IoT..."
2. Adjust the settings as required, for example:
a) Select "Link Direction > Downlink".
b) Select a predefined test model, e.g., "Test Setups/Models > E-
TM1_1__10MHz".
3. Enable "EUTRA/LTE/IoT > State > On".
4. Select "Generate Waveform File".
A standard file-select dialog opens.
a) Navigate to the directory, in that you want to save the file, e.g. /var/user/.
b) Enter a filename (e.g. lte_waveform).
c) Click "Save".
The R&S SMW saves the generated waveform file lte_waveform.wv under the
selected directory /var/user/.
To process the waveform file, load it in the ARB, see Chapter 5.7.4.3, "How to Load
and Play Waveform Files", on page 313.
5.7.4.3 How to Load and Play Waveform Files
Irrespectively on the way a waveform file is generated, you can transfer it to the instru-
ment, load it in the ARB and play it.
To load and play a waveform file
1. Transfer an externally created waveform file to the instrument (see Chapter 11.9,
"How to Transfer Files from and to the Instrument", on page 696).
2. Select "Baseband > ARB"
3. Select "Load Waveform".
A standard file-select dialog opens.
a) Navigate to the directory, that the waveform file contains.
b) Select the waveform file, e.g., /var/user/lte_waveform.
c) Click "Select".
The "ARB" dialog confirms that the waveform file is loaded.
Using the Arbitrary Waveform Generator (ARB)