Rohde & Schwarz SMU200A - CONTROL LIST WIDTH4-Length: #M0 M1; Creating a Waveform Manually

Remote Control Commands
R&S
®
SMU200A
509Operating Manual 1007.9845.32 ─ 15
{CONTROL LIST WIDTH4–Length: #m0m1…mx…mM-1}
(optional for waveforms and multi segment waveforms)
The tag contains a binary marker element stream, which will be given out synchronously
to the I/Q sample sequence. One marker element mx consists of 4 bit, which are assigned
to the 4 possible marker lines of the instrument (one bit per marker line). One 4 bit marker
elements is needed for every I/Q sample in the WAVEFORM tag - so the number of marker
elements M should be equal to the number of I/Q samples. The CONTROL LENGTH tag
has to contain the number of all marker elements M.
Fig. 7-1: Marker element in 4-bit binary format bit order
For standard waveforms the MARKER LIST x tags are a more compact way to define
markers, but in prinziple this CONTROL LIST WIDTH4 format can also be used instead
of the MARKER LIST x tags.
For multi segment waveforms this CONTROL LIST WIDTH4 format is required for marker
definition. The binary marker streams of the individual segments are directly concaten-
ated (without any gap) to one collectively marker stream.
Setting parameters:
Defines the number of bytes in the CONTROL LIST WIDTH4 tag
in ASCII Format and is calculated as follow:
Length = Size of "#" (1 byte) + Number of marker elements m
x
*
(4 bit) / (8 bits/byte)
The value is rounded up for byte alignment.
Marker element in 4-bit binary format.
Length
mx
{CONTROL LIST WIDTH4-51: #m
0
m
1
…m
x
…m
99
}
100 marker elements, each marker element with 4 bits
Example:
Setting onlyUsage:
7.3.2 Creating a Waveform Manually
We will use the example of a sine function in the I channel and a cosine function in the
Q channel, each with 20 points, to explain how a waveform file SICO.WV is generated.
The sine and cosine values are calculated by a short program written in the programming
language C (see the following example for creating a C-program). They are stored in the
file SICO.TXT as follows:
Contents of SICO.TXT:
Sine (I) Cosine (Q)
R&S Signal Generator Waveform and List Format