MT6223D+AD6548 AFC cal fail

MiracleJ

刚刚接触MTK平台，不太熟，请各给高手帮忙分析一下看是什么原因，以下是用meta校准的log信息：
2011-3-17 18:46:38.812 ID = 0

2011-3-17 18:46:38.828 =============== Write initial value to flash begin ===============
2011-3-17 18:46:38.906 Target < Write AFC slope and offset to NVRAM
2011-3-17 18:46:38.953 Target < Set crystal AFC CAP ID
2011-3-17 18:46:39. 31 Target < Write path loss to NVRAM
2011-3-17 18:46:39.593 Target > read GMSK level ramp from NVRAM.
2011-3-17 18:46:40.406 Target < write GMSK level ramp to NVRAM.
2011-3-17 18:46:40.468 Target < write ADC to NVRAM.
2011-3-17 18:46:40.468 ================ Write initial value to flash end ================


2011-3-17 18:46:40.609 ================= Crystal CAPID calibration begin ================
2011-3-17 18:46:40.640 Agilent 8960 < Band = GSM
2011-3-17 18:46:40.640 Agilent 8960 < cell power = -60.00000
2011-3-17 18:46:40.984 Agilent 8960 < TCH ARFCN = 65
2011-3-17 18:46:41.  0 Agilent 8960 < config phase and frequency error.
2011-3-17 18:46:41.515 Agilent 8960 < MS TX level = 12
2011-3-17 18:46:41.515 Target < set Band1900 flag = 0

2011-3-17 18:46:41.531 --------------  Crystal AFC pre-check begin ---------------
2011-3-17 18:46:41.828 CAP ID = 0, AFC DAC = 4096, Freq error = 99100000000000005190000000000000000000.00
2011-3-17 18:46:42. 93 CAP ID = 63, AFC DAC = 4096, Freq error = 99100000000000005190000000000000000000.00
2011-3-17 18:46:42.156 --------------  Crystal AFC pre-check end -----------------

2011-3-17 18:46:42.281 ================== Crystal CAPID check begin =====================
2011-3-17 18:46:42.515 CAP ID = 63, AFC DAC = 0, Freq error = 99100000000000005190000000000000000000.00
2011-3-17 18:46:42.515 PASS: Crystal AFC check: CAP ID = 63,  AFC DAC = 0,  Freq error PPM = 109745293466223708500000000000000000.0000,  min Freq error PPM = -15.00000,  max Freq error PPM = 15.00000

2011-3-17 18:46:42.750 CAP ID = 63, AFC DAC = 8191, Freq error = 99100000000000005190000000000000000000.00
2011-3-17 18:46:42.750 PASS: Crystal AFC check: CAP ID = 63,  AFC DAC = 8191,  Freq error PPM = 109745293466223708500000000000000000.0000,  min Freq error PPM = -15.00000,  max Freq error PPM = 15.00000

2011-3-17 18:46:42.953 CAP ID = 63, AFC DAC = 4096, Freq error = -36696.09000
2011-3-17 18:46:42.953 FAIL: Crystal AFC check: CAP ID = 63, AFC DAC = 4096, Freq error PPM = -40.63797, min Freq error PPM = -2.00000, max Freq error PPM = 2.00000

gook2009

所有板子都这样还是某个是这样

capid pre check 就fail了，如果所有板子都这样，确认下校准文件有没有问题。

snail2599

不好意思，最近我也遇到了这个问题。有没有知道怎么解？MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！！[em01], 不好意思，最近我也遇到了这个问题。有没有知道怎么解压？MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！！[em02]

xu3314334

MTK CrystalCalibration AFC