MT6235平台校准配置文件和6225的有什么区别吗？

henry_li

最近调试一块主板，在校准的时候，高频的AFC校准不过，频率太大。有时候能校过，有时候又不行。这对于生产肯定是不行的，不够稳定。
如下：
============PCS1900 Band=============
DAC1:3998,gain:25,Frequency offset:-117
DAC1:3979,gain:25,Frequency offset:373
DAC1:4041,gain:25,Frequency offset:-428
DAC1:3970,gain:25,Frequency offset:515
DAC1:4055,gain:25,Frequency offset:-591
DAC1:3957,gain:25,Frequency offset:709
DAC1:4075,gain:25,Frequency offset:-830
DAC1:3937,gain:25,Frequency offset:994
DAC1:4102,gain:25,Frequency offset:-1192
DAC1:3904,gain:25,Frequency offset:1438
DAC1:4143,gain:25,Frequency offset:-1701
FreqErr_norm min:1127.64,Read Freq:-2380.57
Write AFC offset to NVRAM:375
FreqErr_norm min:1074.75,Read Freq:2268.91
Write AFC offset to NVRAM:374
FreqErr_norm min:1074.75,Read Freq:2299.59
Write AFC offset to NVRAM:373
FreqErr_norm min:1074.75,Read Freq:2290.42
Write AFC offset to NVRAM:372
FreqErr_norm min:1074.75,Read Freq:2292.82
Write AFC offset to NVRAM:371
FreqErr_norm min:1074.75,Read Freq:2293.39
Write AFC offset to NVRAM:370
FreqErr_norm min:1054.77,Read Freq:2226.75
Write AFC offset to NVRAM:369
FreqErr_norm min:1054.77,Read Freq:2248.53
Write AFC offset to NVRAM:368
FreqErr_norm min:1050.28,Read Freq:2217.26
Write AFC offset to NVRAM:367
FreqErr_norm min:1027.76,Read Freq:2169.71
Write AFC offset to NVRAM:366
Write the min tx afc offset 367 to NVRAM
FreqErr_min:1027.76,tx_afc_offset_min 367
tx_afc_offset check fail 367,MAX:30,MIN:-30

关于CFG文件中的AFC代码我现在改为：
[AFC Calibration]
AFC_BAND = GSM
AFC_ARFCN = 65
N_AFC = 10
DAC1 = 4000
DAC2 = 5000
CRYSTAL_DAC1 = 3800
CRYSTAL_DAC2 = 4200

[AFC table]
MAX_INIT_AFC_DAC = 7000
MIN_INIT_AFC_DAC = 2000
MAX_AFC_SLOPE = 10.0
MIN_AFC_SLOPE = 1.0

[Crystal AFC Calibration]
CRYSTAL_AFC_BAND = GSM
CRYSTAL_AFC_ARFCN = 65
CRYSTAL_AFC_GSM850_PCL = 12
CRYSTAL_AFC_GSM900_PCL = 12
CRYSTAL_AFC_DCS1800_PCL = 7
CRYSTAL_AFC_PCS1900_PCL = 7
CRYSTAL_AFC_CAL_DAC = 4000
CRYSTAL_AFC_CHECK_DAC1 = 0
CRYSTAL_AFC_CHECK_DAC2 = 8000
CRYSTAL_AFC_MIN_FREQ_ERR_PPM = -20.0
CRYSTAL_AFC_MAX_FREQ_ERR_PPM = 20.0
CRYSTAL_AFC_MAX_AFC_TRACK_INIT_FREQ_ERR = 50.0
CRYSTAL_AFC_FREQ_ERR_MEASUSE_COUNT = 10
CRYSTAL_AFC_TRX_OFFSET_RECURSIVE_TIMES = 20


我对比了6225的校准配置文件，发现没什么问题啊。各位XDJM，救救小弟啊。。。。急。[em03]

henry_li

难道没有人知道啊。斑竹？

ffk10

好像应该多了对EDGE的校准参数吧

chenyuefu203

MT6235不是释放有35的校准文件吗？直接拷过来就可以了，没有的话就申请呀。。。[em07][em07]

henry_li

以下是引用chenyuefu203在2009-11-10 12:24:50的发言：
MT6235不是释放有35的校准文件吗？直接拷过来就可以了，没有的话就申请呀。。。[em07][em07]

你是说MTK专门为MT6235平台配置了校准文件？？？能传一份给我吗？
zephyrchang@163.com

elvis_yan

貌似差距不大吧！

henry_li

个人觉得没啥区别。我把我能改的地方都改了，有时候频率还是校准不过。我换了晶振也没解决问题。头疼ving[em03]

answerxin3

查查VCCRF VAFC参考设计。漏贴小电容了没。[em12]