Rohde & Schwarz SMBV100A - Page 469

Remote Control Commands
R&S
®
SMBV100A
452Operating Manual 1407.6062.32 ─ 08
0.309017 -0.951056
-0.000000 -1.000000
-0.309017 -0.951057
-0.587785 -0.809017
-0.809017 -0.587785
-0.951056 -0.309017
-1.000000 0.000000
-0.951056 0.309017
-0.809017 0.587785
-0.587785 0.809017
-0.309017 0.951057
The decimal values in SICO.TXT should be normalized such that they are between –1.0
and +1.0. The waveform file SICO.WV will be based on the contents of this file.
To be read by the R&S SMBV these waveform data must be coded binary and packed
into an appropriate WAVEFORM tag. A tag consists of a name and a data set and is
enclosed in curved brackets. The tag is a kind of label carrying information about what
the R&S SMBV should do with the data set (see above and step 3 of the following
instructions).
The following steps outline how to create the waveform file SICO.WV:
1. The values from the file SICO.TXT must be converted into binary format consisting
of integer numbers without a sign and with 16-bit width. The numeric range between
–1.0 and +1.0 corresponds to the modulation range of the waveform D/A converter
of 65535 (2
16
-1).
+1.0 -> 32767 = 0x7FFF
0.0 -> 0 = 0x0000
-1.0 -> -32767 = 0x8001
A further C-program is suitable for creating the binary data set from the ASCII values
stored in SICO.TXT file (see following example for creating a C-program). This pro-
gram stores the binary data set to a file called SICO.WV.
The contents of the file SICO.WV reads as follows:
IQIQIQIQIQIQIQI ... IQ
Note: There is no readable representation for binary values in this document. This is
why we use the sequence IQIQIQ to characterize the binary code in the present
example.
2. The file SICO.WV now contains the binary data set corresponding to the 20 I/Q pairs.
Before this binary data set can be further processed in step 3, the TYPE and the 
CLOCK tag must be placed in front.
To enter the TYPE tag in the SICO.WV file an ASCII editor which is able to handle
binary data as well, e.g. the Microsoft Windows editor NOTEPAD.EXE, must be used.
Now the contents of the SICO.WV file read:
{TYPE: SMU-WV, 0}{CLOCK: 10e6} IQIQIQIQIQIQIQIQIQI ... IQ
R&S Signal Generator Waveform and List Format