Rohde & Schwarz R&S SMW200A - Tags for Waveforms, Data and Control Lists

Configuring the Internal Baseband Source
R&S
®
SMW200A
327User Manual 1175.6632.02 ─ 30
Example: How to assign and activate a data list
Note: Irrespectively on the way they are created, generated data lists are not automati-
cally used.
We assume, that a data list dl.dm_iqd is created and saved in the direc-
tory /var/user/.
The following example shows how to enable the R&S SMW to use this data list as data
source for the custom digital modulation.
MMEM:CDIRectory "/var/user"
:SOURce1:BB:DM:DLISt:CATalog?
// Response: dl
:SOURce1:BB:DM:DLISt:SELect "dl"
5.7.4.9 Editing Waveform Files, Data and Control Lists
You can edit the internally and externally crated waveform files, data and control lists.
The waveform, data and control lists files contain binary and ASCII data.
Consider the following rules while editing files with binary data.
Rules for editing binary data (waveforms, data and control lists)
●
Use hex data editor
Always use a hex data editor to edit files containing binary data.
Editing of binary data file with a text editor, even if you only change the ASCII part
of the file, corrupts the file.
●
Adapt the length information in the {EMPTYTAG}
If you change the content of a waveform file, change also the
{EMPTYTAG-Length} value.
For example, if you add a tag or add bytes to an existing tag, reduce the length
information by the number of newly introduced bytes.
5.7.5 Tags for Waveforms, Data and Control Lists
The R&S SMW uses a simple tag-oriented format for externally or internally generated
waveforms, data and control lists. Files with this format can be transmitted from an
external computer to the instrument and vice versa. These files are transmitted as a
binary data block, using SCPI command [:SOURce<hw>]:BB:ARBitrary:
WAVeform:DATA, [:SOURce<hw>]:BB:DM:DLISt:DATA, and [:SOURce<hw>]:
BB:DM:CLISt:DATA.
File can be transmitted via the GPIB interface of the instrument.
Tag general format
Tags are self-contained information units, enclosed in braces { }. Their general format
is {Name: Data} or {Name-Length: Data}. The colon separates the name part
and the data part. The colon can be followed by a space for the sake of legibility.
●
The Name identifies the tag. It is always expressed in capital letters.
Using the Arbitrary Waveform Generator (ARB)