MT6225+SKY77318+ESHS-085DC挑战性问题

huiyic

最近生产样机发现，开始一切正常，正常使用一段时间发现两台机器打不了电话也接不到电话。重新下软件，没有结果。连CMU，发现功率时有时无一直切换。用META在非信令模式下一切正常（应该可以说明通路是没问题的）。换PA，TC，MT6225，FLASH，最后把所有硬件包括电容电感电阻全换完了还是没结果。直接从PA后用铜管焊出射频线连CMU问题依然。
校准出问题报告如下
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2008-3-7 15:40:12. 31 ID = 0
2008-3-7 15:40:12. 31 =============== Write initial value to flash begin ===============
2008-3-7 15:40:12. 93 Target < Write AFC slope and offset to NVRAM
2008-3-7 15:40:12.140 Target < Write crystal AFC CAP ID value to NVRAM
2008-3-7 15:40:12.203 Target < Write path loss to NVRAM
2008-3-7 15:40:12.828 Target < write GMSK level ramp to NVRAM.
2008-3-7 15:40:12.875 Target < write ADC to NVRAM.
2008-3-7 15:40:12.875 ================ Write initial value to flash end ================

2008-3-7 15:40:27.296 ================= Crystal CAPID calibration begin ================
2008-3-7 15:40:27.984 CMU 200< Band = GSM
2008-3-7 15:40:28. 93 CMU 200< cell power = -60.000000
2008-3-7 15:40:28. 93CMU 200 < TCH ARFCN = 65
2008-3-7 15:40:28. 93 cmu 200< config phase and frequency error.
2008-3-7 15:40:28. 93CMU 200 < MS TX level = 12
2008-3-7 15:40:28. 93 Target < set Band1900 flag = 0
2008-3-7 15:40:28.125 --------------  Crystal AFC pre-check begin ---------------
2008-3-7 15:40:28.468 CAP ID = 0, AFC DAC = 4096, Freq error = 21509.480000
2008-3-7 15:40:28.765 CAP ID = 63, AFC DAC = 4096, Freq error = -19482.700000
2008-3-7 15:40:28.765 --------------  Crystal AFC pre-check end -----------------
2008-3-7 15:40:29.171 CAP ID = 26, AFC DAC = 4096, Freq error = -645.140000
2008-3-7 15:40:29.484 CAP ID = 13, AFC DAC = 4096, Freq error = 9752.520000
2008-3-7 15:40:29.796 CAP ID = 20, AFC DAC = 4096, Freq error = 3851.640000
2008-3-7 15:40:30.125 CAP ID = 23, AFC DAC = 4096, Freq error = 1613.070000
2008-3-7 15:40:30.437 CAP ID = 25, AFC DAC = 4096, Freq error = 144.190000
2008-3-7 15:40:30.484 ================= Crystal CAPID calibration end ==================
2008-3-7 15:40:30.609 ================== Crystal CAPID check begin =====================
2008-3-7 15:40:30.859 CAP ID = 25, AFC DAC = 0, Freq error = -24107.970000
2008-3-7 15:40:30.859 PASS: Crystal AFC check: CAP ID = 25,  AFC DAC = 0,  Freq error PPM = -26.697641,  min Freq error PPM = -13.000000,  max Freq error PPM = 13.000000
2008-3-7 15:40:31.171 CAP ID = 25, AFC DAC = 8191, Freq error = 19163.590000
2008-3-7 15:40:31.171 PASS: Crystal AFC check: CAP ID = 25,  AFC DAC = 8191,  Freq error PPM = 21.222137,  min Freq error PPM = -13.000000,  max Freq error PPM = 13.000000
2008-3-7 15:40:31.218 Target< Write crystal AFC CAP ID to NVRAM
2008-3-7 15:40:31.218 ================== Crystal CAPID check end =======================
2008-3-7 15:40:34.890 =================== AFC slope calibration begin ==================
2008-3-7 15:40:36.296CMU 200 < Band = EGSM
2008-3-7 15:40:36.375CMU 200 < BCH ARFCN = 65
< cell power = -60.000000
2008-3-7 15:40:36.625 Target < ARFCN = 65, dac value = 3800, gain = 25.000000 dB, testing number = 10
2008-3-7 15:40:37. 93 Target > freqOffset = 1850
2008-3-7 15:40:37. 93 Target < ARFCN = 65, dac value = 4200, gain = 25.000000 dB, testing number = 10
2008-3-7 15:40:37. 93 TimerCal->Enabled 3= 0
2008-3-7 15:40:37.562 Target > freqOffset = -740
2008-3-7 15:40:37.609 Target < Write AFC slope and offset to NVRAM
2008-3-7 15:40:37.609 ======================= AFC calibration end ======================

2008-3-7 15:40:37.609 ================== AFC calibration check begin ===================
2008-3-7 15:40:37.609 PASS: AFC slope check: AFC = 6.475000 min AFC slope = 1.000000, max AFC slope = 10.000000
2008-3-7 15:40:37.609 PASS: AFC initial DAC value check: AFC = 4085.000000, min AFC initial DAC value = 2000, max AFC initial DAC value = 7000
2008-3-7 15:40:37.609 Target< default value = 4085
2008-3-7 15:40:37.609 Target< slope inv = 632
2008-3-7 15:40:37.609 TimerCal->Enabled 4= 0
2008-3-7 15:40:37.640 Target< Write AFC value to NVRAM
2008-3-7 15:40:37.640 Target < Set AFC DAC = 4085
2008-3-7 15:40:38.906CMU 200 < Band = EGSM
2008-3-7 15:40:39. 15CMU 200 < cell power = -60.000000
2008-3-7 15:40:39.109CMU 200 < BCH ARFCN = 65
2008-3-7 15:40:39.234CMU 200 < TCH ARFCN = 65
2008-3-7 15:40:39.234CMU 200 < TCH timeslot = 3
2008-3-7 15:40:39.234CMU 200 < TSC = 5
2008-3-7 15:40:39.312CMU 200 < MS TX level = 12
2008-3-7 15:40:39.656 Target < ARFCN = 65, dac value = 4085, gain = 25.000000 dB, testing number = 10
2008-3-7 15:40:39.656 TimerCal->Enabled 2= 1
2008-3-7 15:40:40.140 Target > freqOffset = -7
2008-3-7 15:40:40.203  Target< ARFCN = 65, TSC = 0, power = 12, frames = 0, dac value = 4084
2008-3-7 15:40:42.359 FAIL : CMU 200< fetch phase error.
2008-3-7 15:40:42.484 FAIL: CMU 200 signalling close
大虾支招啊。谢谢

fht21

你这个是AFC calibration 就不过吧 ，怎么可能打电话，
可能同PA没关系。
你这个报告太详细了，能不能出个ATE 的报告[em01]

huiyic

是AFC calibration不过。我们就用META做校准没有用ATE。但是一般的不用校准也可以打电话啊，只是信号没那么好而已。

huiyic

我觉得主要问题是连CMU的时候老是掉线的问题引起校准不过.但现在就是找不到问题点.恳请高手赐教,谢谢