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MAX5868EVKIT Datasheet(PDF) 54 Page - Maxim Integrated Products
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Maxim Integrated │ 54
MAX5868 Evaluation Kit
Appendix III – Pattern Files
Creating Pattern Files
The MAX5868 EVKIT Software Controller is provided with a limited number of sample patterns. The provided patterns
allow the user to generate a two-tone, CW signal with a 1MHz spacing between the tones. Typically, the user will want
to generate signals with other properties, including modulated signals.
A \matlab folder is included in the MAX5868\PatternFiles folder, which contains sample MATLAB routines (.m files) which
allow a user with MATLAB installed to create additional continuous wave, sinusoidal test patterns. The makesignal.m routine
will perform the CW generation, providing a complex vector with a range of ±1.0. The set_datascale_avg.m routine is
used to convert the complex vector into integer representations of the offset binary values for the I and Q data paths.
Finally, the scaled pattern is stored to a file using the MAX5868_PatFile.m routine which formats the pattern appropriately
for use with the VC707. Please refer to the comments in these files for additional information. Lines that begin with %
following the Copy Right statement provide information about the input arguments used by these routines.
The pattern file can use any extension, such as csv, txt, etc., as long as the contents are simple text and conform to the
format expected by the MAX5868 EV kit Software Controller.
The specific format is as follows:
● The first line contains the total number of I/Q data points, N, in the pattern.
● The total number of lines in the pattern file will be N + 1.
● The second through N lines contain four, comma separated integer values. These values represent, in order:
• the I data Least Significant BYTE (LS BYTE)
• the I data Most Significant BYTE (MS BYTE)
• the Q data LS BYTE
• the Q data MS BYTE.
Note: I/Q data is in decimal format, offset binary with the 14-bits of data being LSB-justified. That is, the MS BYTE values
can range from 0 to 63 and the LS BYTE values can range from 0 to 255.
For example, the first few lines of the file could look something like this:
19, 62, 253, 37
19, 62, 250, 37
17, 62, 248, 37
15, 62, 245, 37
13, 62, 242, 37
10, 62, 239, 37
7, 62, 236, 37
3, 62, 234, 37
#Denotes RoHS compliant.
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