• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 46 subscribers
  • Views 268 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AFE58JD28: PRBS9 test data formatting into JESD204B 14-bit sample data values

Steve Mowbray
Prodigy 30 points
Part Number: AFE58JD28

Tool/software:

Regarding PRBS test patterns -- how is the regular PRBS9 random bit stream packed into 14-bit sample values? 

According to Table 9-41 of May 2021 version datasheet

"A 16-bit pattern is generated by a 23 bit (or 9-bit) PRBS pattern generator (taken from the MSB side) and replaces the DIGRESx word."

We are able to record the sequence of sample values when PRBS test data mode is invoked which seems to repeat every 511 samples as expected for PRBS9 and all channels have identical data but cannot fathom the formatting relationship between PRBS9 raw binary and the 14-bit sample data...

Thanks

Steve 

  • 0
    TI__Expert 5655 points

    Using PRBS_MODE register you can choose PRBS23 (PRBS_MODE =0 ) or PRBS9 (PRBS_MODE =1) .

    Now PRBS data is generated based on corresponding mode and 16bit PRBS data is generated .

    Now based on serialization mode data is getting selected to give out as test pattern.

    If serialization factor is 14 - Then the MSb14 bits are selected in this 16bit PRBS data.

     

  • 0 in reply to Sachin H K
    Prodigy 30 points

    Yes I understand thus far -- the missing piece of the puzzle for me is how is the ITU-T O.150 defined PRBS9 generator single bit stream packed into the 16-bit WORD used to replace DIGRESx? For example my picture explaining the question below:

    Intention is to regenerate the same result at the receiving end and compare for bit errors

    ###UPDATE### I recorded the PRBS9 sequence for posterity but am unable to discern any specific relationship:

    afe58jd28_prbs9_14bit_data.txt 
    index	binary	S14
0	01110001101101	7277
1	01110001001100	7244
2	00010000000010	1026
3	01000110000100	4484
4	10010101011000	-6824
5	10111101001101	-4275
6	00100010100001	2209
7	01101001111110	6782
8	00100100101101	2349
9	11100100110101	-1739
10	11001100000001	-3327
11	00110010100011	3235
12	00101111111010	3066
13	10110001110101	-5003
14	01011001111000	5752
15	11101110100000	-1120
16	01011011011101	5853
17	00001011010111	727
18	01010101000000	5440
19	10010101111001	-6791
20	11011100000011	-2301
21	01110100100111	7463
22	10111010100010	-4446
23	00001100111000	824
24	01111011011001	7897
25	10000111011110	-7714
26	01111111110000	8176
27	11101111100010	-1054
28	10011001000001	-6591
29	10100111011010	-5670
30	11110011111001	-775
31	11000101010010	-3758
32	11100011011010	-1830
33	11100010011000	-1896
34	00100000000100	2052
35	10001100001001	-7415
36	00101010110000	2736
37	01111010011011	7835
38	01000101000010	4418
39	11010011111101	-2819
40	01001001011011	4699
41	11001001101010	-3478
42	10011000000011	-6653
43	01100101000110	6470
44	01011111110100	6132
45	01100011101011	6379
46	10110011110001	-4879
47	11011101000001	-2239
48	10110110111011	-4677
49	00010110101111	1455
50	10101010000001	-5503
51	00101011110010	2802
52	10111000000111	-4601
53	11101001001111	-1457
54	01110101000100	7492
55	00011001110000	1648
56	11110110110011	-589
57	00001110111100	956
58	11111111100000	-32
59	11011111000101	-2107
60	00110010000010	3202
61	01001110110100	5044
62	11100111110011	-1549
63	10001010100100	-7516
64	11000110110101	-3659
65	11000100110001	-3791
66	01000000001000	4104
67	00011000010011	1555
68	01010101100001	5473
69	11110100110111	-713
70	10001010000101	-7547
71	10100111111011	-5637
72	10010010110111	-6985
73	10010011010100	-6956
74	00110000000110	3078
75	11001010001101	-3443
76	10111111101000	-4120
77	11000111010110	-3626
78	01100111100011	6627
79	10111010000011	-4477
80	01101101110110	7030
81	00101101011111	2911
82	01010100000010	5378
83	01010111100101	5605
84	01110000001110	7182
85	11010010011110	-2914
86	11101010001001	-1399
87	00110011100001	3297
88	11101101100110	-1178
89	00011101111000	1912
90	11111111000001	-63
91	10111110001011	-4213
92	01100100000100	6404
93	10011101101000	-6296
94	11001111100110	-3098
95	00010101001000	1352
96	10001101101010	-7318
97	10001001100010	-7582
98	10000000010000	-8176
99	00110000100111	3111
100	10101011000011	-5437
101	11101001101110	-1426
102	00010100001010	1290
103	01001111110110	5110
104	00100101101111	2415
105	00100110101001	2473
106	01100000001100	6156
107	10010100011010	-6886
108	01111111010001	8145
109	10001110101100	-7252
110	11001111000111	-3129
111	01110100000110	7430
112	11011011101100	-2324
113	01011010111110	5822
114	10101000000101	-5627
115	10101111001011	-5173
116	11100000011100	-2020
117	10100100111101	-5827
118	11010100010010	-2798
119	01100111000010	6594
120	11011011001101	-2355
121	00111011110000	3824
122	11111110000011	-125
123	01111100010111	7959
124	11001000001001	-3575
125	00111011010001	3793
126	10011111001101	-6195
127	00101010010001	2705
128	00011011010101	1749
129	00010011000100	1220
130	00000000100001	33
131	01100001001110	6222
132	01010110000110	5510
133	11010011011100	-2852
134	00101000010101	2581
135	10011111101100	-6164
136	01001011011111	4831
137	01001101010011	4947
138	11000000011000	-4072
139	00101000110100	2612
140	11111110100010	-94
141	00011101011001	1881
142	10011110001111	-6257
143	11101000001101	-1523
144	10110111011000	-4648
145	10110101111101	-4739
146	01010000001010	5130
147	01011110010111	6039
148	11000000111001	-4039
149	01001001111010	4730
150	10101000100100	-5596
151	11001110000101	-3195
152	10110110011010	-4710
153	01110111100001	7649
154	11111100000111	-249
155	11111000101110	-466
156	10010000010010	-7150
157	01110110100011	7587
158	00111110011011	3995
159	01010100100011	5411
160	00110110101011	3499
161	00100110001000	2440
162	00000001000010	66
163	11000010011100	-3940
164	10101100001101	-5363
165	10100110111001	-5703
166	01010000101011	5163
167	00111111011001	4057
168	10010110111111	-6721
169	10011010100110	-6490
170	10000000110001	-8143
171	01010001101001	5225
172	11111101000101	-187
173	00111010110010	3762
174	00111100011111	3871
175	11010000011010	-3046
176	01101110110000	7088
177	01101011111010	6906
178	10100000010100	-6124
179	10111100101110	-4306
180	10000001110011	-8077
181	10010011110101	-6923
182	01010001001000	5192
183	10011100001011	-6389
184	01101100110100	6964
185	11101111000011	-1085
186	11111000001111	-497
187	11110001011100	-932
188	00100000100101	2085
189	11101101000111	-1209
190	01111100110110	7990
191	10101001000111	-5561
192	01101101010111	6999
193	01001100010001	4881
194	00000010000100	132
195	10000100111001	-7879
196	01011000011011	5659
197	01001101110010	4978
198	10100001010110	-6058
199	01111110110010	8114
200	00101101111110	2942
201	00110101001100	3404
202	00000001100011	99
203	10100011010010	-5934
204	11111010001011	-373
205	01110101100101	7525
206	01111000111110	7742
207	10100000110101	-6091
208	11011101100000	-2208
209	11010111110101	-2571
210	01000000101001	4137
211	01111001011101	7773
212	00000011100111	231
213	00100111101011	2539
214	10100010010000	-6000
215	00111000010111	3607
216	11011001101000	-2456
217	11011110000111	-2169
218	11110000011110	-994
219	11100010111001	-1863
220	01000001001010	4170
221	11011010001111	-2417
222	11111001101100	-404
223	01010010001110	5262
224	11011010101110	-2386
225	10011000100010	-6622
226	00000100001000	264
227	00001001110010	626
228	10110000110111	-5065
229	10011011100100	-6428
230	01000010101101	4269
231	11111101100100	-156
232	01011011111100	5884
233	01101010011001	6809
234	00000011000110	198
235	01000110100101	4517
236	11110100010110	-746
237	11101011001011	-1333
238	11110001111101	-899
239	01000001101011	4203
240	10111011000001	-4415
241	10101111101010	-5142
242	10000001010010	-8110
243	11110010111011	-837
244	00000111001110	462
245	01001111010111	5079
246	01000100100001	4385
247	01110000101111	7215
248	10110011010000	-4912
249	10111100001111	-4337
250	11100000111101	-1987
251	11000101110011	-3725
252	10000010010100	-8044
253	10110100011110	-4834
254	11110011011000	-808
255	10100100011100	-5860
256	10110101011100	-4772
257	00110001000100	3140
258	00001000010001	529
259	00010011100101	1253
260	01100001101111	6255
261	00110111001000	3528
262	10000101011010	-7846
263	11111011001001	-311
264	10110111111001	-4615
265	11010100110011	-2765
266	00000110001100	396
267	10001101001011	-7349
268	11101000101100	-1492
269	11010110010110	-2666
270	11100011111011	-1797
271	10000011010110	-7978
272	01110110000010	7554
273	01011111010101	6101
274	00000010100101	165
275	11100101110111	-1673
276	00001110011101	925
277	10011110101110	-6226
278	10001001000011	-7613
279	11100001011110	-1954
280	01100110100001	6561
281	01111000011111	7711
282	11000001111011	-3973
283	10001011100110	-7450
284	00000100101001	297
285	01101000111100	6716
286	11100110110001	-1615
287	01001000111000	4664
288	01101010111000	6840
289	01100010001000	6280
290	00010000100011	1059
291	00100111001010	2506
292	11000011011110	-3874
293	01101110010001	7057
294	00001010110100	692
295	11110110010010	-622
296	01101111110010	7154
297	10101001100110	-5530
298	00001100011001	793
299	00011010010111	1687
300	11010001011000	-2984
301	10101100101100	-5332
302	11000111110111	-3593
303	00000110101101	429
304	11101100000101	-1275
305	10111110101010	-4182
306	00000101001010	330
307	11001011101110	-3346
308	00011100111010	1850
309	00111101011101	3933
310	00010010000110	1158
311	11000010111101	-3907
312	11001101000011	-3261
313	11110000111111	-961
314	10000011110111	-7945
315	00010111001100	1484
316	00001001010011	595
317	11010001111001	-2951
318	11001101100010	-3230
319	10010001110001	-7055
320	11010101110001	-2703
321	11000100010000	-3824
322	00100001000110	2118
323	01001110010101	5013
324	10000110111101	-7747
325	11011100100010	-2270
326	00010101101001	1385
327	11101100100100	-1244
328	11011111100100	-2076
329	01010011001100	5324
330	00011000110010	1586
331	00110100101111	3375
332	10100010110001	-5967
333	01011001011001	5721
334	10001111101110	-7186
335	00001101011011	859
336	11011000001011	-2549
337	01111101010101	8021
338	00001010010101	661
339	10010111011100	-6692
340	00111001110100	3700
341	01111010111010	7866
342	00100100001100	2316
343	10000101111011	-7813
344	10011010000111	-6521
345	11100001111111	-1921
346	00000111101111	495
347	00101110011001	2969
348	00010010100111	1191
349	10100011110011	-5901
350	10011011000101	-6459
351	00100011100011	2275
352	10101011100010	-5406
353	10001000100000	-7648
354	01000010001100	4236
355	10011100101010	-6358
356	00001101111010	890
357	10111001000101	-4539
358	00101011010011	2771
359	11011001001001	-2487
360	10111111001001	-4151
361	10100110011000	-5736
362	00110001100101	3173
363	01101001011111	6751
364	01000101100011	4451
365	10110010110011	-4941
366	00011111011101	2013
367	00011010110110	1718
368	10110000010110	-5098
369	11111010101010	-342
370	00010100101011	1323
371	00101110111000	3000
372	01110011101001	7401
373	11110101110101	-651
374	01001000011001	4633
375	00001011110110	758
376	00110100001110	3342
377	11000011111111	-3841
378	00001111011111	991
379	01011100110010	5938
380	00100101001110	2382
381	01000111100111	4583
382	00110110001010	3466
383	01000111000110	4550
384	01010111000100	5572
385	00010001000000	1088
386	10000100011000	-7912
387	00111001010101	3669
388	00011011110100	1780
389	01110010001010	7306
390	01010110100111	5543
391	10110010010010	-4974
392	01111110010011	8083
393	01001100110000	4912
394	01100011001010	6346
395	11010010111111	-2881
396	10001011000111	-7481
397	01100101100111	6503
398	00111110111010	4026
399	00110101101101	3437
400	01100000101101	6189
401	11110101010100	-684
402	00101001010111	2647
403	01011101110000	6000
404	11100111010010	-1582
405	11101011101010	-1302
406	10010000110011	-7117
407	00010111101101	1517
408	01101000011101	6685
409	10000111111111	-7681
410	00011110111110	1982
411	10111001100100	-4508
412	01001010011101	4765
413	10001111001111	-7217
414	01101100010101	6933
415	10001110001101	-7283
416	10101110001001	-5239
417	00100010000000	2176
418	00001000110000	560
419	01110010101011	7339
420	00110111101001	3561
421	11100100010100	-1772
422	10101101001111	-5297
423	01100100100101	6437
424	11111100100110	-218
425	10011001100000	-6560
426	11000110010100	-3692
427	10100101111111	-5761
428	00010110001110	1422
429	11001011001111	-3377
430	01111101110100	8052
431	01101011011011	6875
432	11000001011010	-4006
433	11101010101000	-1368
434	01010010101111	5295
435	10111011100000	-4384
436	11001110100100	-3164
437	11010111010100	-2604
438	00100001100111	2151
439	00101111011011	3035
440	11010000111011	-3013
441	00001111111110	1022
442	00111101111100	3964
443	01110011001000	7368
444	10010100111011	-6853
445	00011110011111	1951
446	11011000101010	-2518
447	00011100011011	1819
448	01011100010011	5907
449	01000100000000	4352
450	00010001100001	1121
451	11100101010110	-1706
452	01101111010011	7123
453	11001000101000	-3544
454	01011010011111	5791
455	11001001001011	-3509
456	11111001001101	-435
457	00110011000000	3264
458	10001100101000	-7384
459	01001011111110	4862
460	00101100011101	2845
461	10010110011110	-6754
462	11111011101000	-280
463	11010110110111	-2633
464	10000010110101	-8011
465	11010101010000	-2736
466	10100101011110	-5794
467	01110111000000	7616
468	10011101001001	-6327
469	10101110101000	-5208
470	01000011001110	4302
471	01011110110110	6070
472	10100001110111	-6025
473	00011111111100	2044
474	01111011111000	7928
475	11100110010000	-1648
476	00101001110110	2678
477	00111100111110	3902
478	10110001010100	-5036
479	00111000110110	3638
480	10111000100110	-4570
481	10001000000001	-7679
482	00100011000010	2242
483	11001010101100	-3412
484	11011110100110	-2138
485	10010001010000	-7088
486	10110100111111	-4801
487	10010010010110	-7018
488	11110010011010	-870
489	01100110000000	6528
490	00011001010001	1617
491	10010111111101	-6659
492	01011000111010	5690
493	00101100111100	2876
494	11110111010000	-560
495	10101101101110	-5266
496	00000101101011	363
497	10101010100000	-5472
498	01001010111100	4796
499	11101110000001	-1151
500	00111010010011	3731
501	01011101010001	5969
502	10000110011100	-7780
503	10111101101100	-4244
504	01000011101111	4335
505	00111111111000	4088
506	11110111110001	-527
507	11001100100000	-3296
508	01010011101101	5357
509	01111001111100	7804
510	01100010101001	6313

  • 0 in reply to Sachin H K
    Prodigy 30 points

    Thanks Sachin -- I would never have derived this packing method by trial and error so yes helps enormously