Texas Instruments DAC38RF8x, Application Report

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Introduction to JESD204B Short Pattern Test
13 SLAA750 – July 2017
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DAC38RF8x Test Modes
button.
Figure 16. HSDC Pro Tone Creation
Step 7. The spectrum analyzer should now show a tone at 1010-MHz. If the tone is present, the DAC
has been configured correctly and is ready to execute the JESD204B short pattern test.
2.7 Short Pattern Test Procedure
To run the short pattern test, the user must first create the pattern file. The pattern file is a CSV file
containing the information that is sent to the DAC during the test, and is different for each configuration.
Users can look up their corresponding pattern in
Table 3 . The given patterns are in 2’s complement
hexadecimal format.
Table 3. JESD204B Short Test Patterns
Pattern I0 Q0 I1 Q1
82121 7CB8, F431 6DA9, E520 — —
42111 7CB8 F431 — —
22210 7CB8 F431 — —
12410 7CB8 F431 — —
44210 7CB8 F431 6DA9 E520
24410 7CB8 F431 6DA9 E520
41121 7CB8, F431 — — —
81180
7C00, B800, F400, 3100,
6D00, A900, E500, 2000
— — —
24310 7CB0 F431 6DA0 E520
41380
7CB0, F430, 6DA0, E520,
F870, E960, DA50, CB40
— — —
The generated file should repeat the pattern for 256 lines. Figure 17 shows an example of the beginning
of the 4421 pattern file. Because the 4421 pattern contains data in the I0, Q0, I1, and Q1 sections, the
pattern file for this mode is four columns wide. Also, because each section contains only one value, that
value is simply repeated for the entirety of the column. For sections containing more than one value, the
pattern in the corresponding column cycles through the values instead of just repeating the one value.