求助，MTK6139 AFC 校准问题

san_water

MTK校准AFC FAIL ，由于刚接触MTK，所有对这个过程不是很明白，请大家帮忙分析分析，可能问题出在哪里，谢谢！
6139＋SKYWORKS518

Enter into META Mode OK
CAP ID[0]:0,DAC:4000,Freq:66.05(PPM),Center Freq:894.00,Tch:20
CAP ID[1]:63,DAC:4000,Freq:28.10(PPM),Center Freq:894.00,Tch:20
================== Crystal BypassCapIDCal check begin =====================
chk_CapIdFreqErr[0].FreqErr=56589.6
PASS:63.3
chk_CapIdFreqErr[1].FreqErr=61402.0
PASS:68.7
AFC Calibration Failed,Slop:0.000,min:1.000,max:10.000
================== TX AFC offset calibration begin =====================
============GSM900 Band=============
First AFC Tracking:i_DAC1 0
================== TX AFC offset calibration error  =====================
AFC Calibration time=6.30(sec)

[此贴子已经被作者于2007-11-21 18:00:42编辑过]

san_water

怎么没有人帮忙啊？
再给一组，希望高手相助啊！谢谢！
2007-11-21 23:39:13.781 ID = 0

2007-11-21 23:39:13.781 =============== Write initial value to flash begin ===============
2007-11-21 23:39:13.812 Target < Write AFC slope and offset to NVRAM
2007-11-21 23:39:13.843 Target < Write crystal AFC CAP ID value to NVRAM
2007-11-21 23:39:14.265 Target > read GMSK level ramp from NVRAM.
2007-11-21 23:39:14.734 Target < write GMSK level ramp to NVRAM.
2007-11-21 23:39:14.734 ================ Write initial value to flash end ================


2007-11-21 23:39:21.343 ================= Crystal CAPID calibration begin ================
2007-11-21 23:39:22.187 CMU 200< Band = GSM
2007-11-21 23:39:22.281 CMU 200< cell power = -60.000000
2007-11-21 23:39:22.296CMU 200 < TCH ARFCN = 20
2007-11-21 23:39:22.296 cmu 200< config phase and frequency error.
2007-11-21 23:39:22.296CMU 200 < MS TX level = 12
2007-11-21 23:39:22.296 Target < set Band1900 flag = 0

2007-11-21 23:39:22.312 --------------  Crystal AFC pre-check begin ---------------
2007-11-21 23:39:22.750 CAP ID = 0, AFC DAC = 4000, Freq error = 30248.610000
2007-11-21 23:39:23.109 CAP ID = 63, AFC DAC = 4000, Freq error = -12505.670000
2007-11-21 23:39:23.109 --------------  Crystal AFC pre-check end -----------------
2007-11-21 23:39:23.578 CAP ID = 32, AFC DAC = 4000, Freq error = 2381.400000
2007-11-21 23:39:23.937 CAP ID = 48, AFC DAC = 4000, Freq error = -6395.890000
2007-11-21 23:39:24.312 CAP ID = 40, AFC DAC = 4000, Freq error = -2385.990000
2007-11-21 23:39:24.656 CAP ID = 36, AFC DAC = 4000, Freq error = -121.850000
2007-11-21 23:39:25. 15 CAP ID = 34, AFC DAC = 4000, Freq error = 1080.990000
2007-11-21 23:39:25.359 CAP ID = 35, AFC DAC = 4000, Freq error = 535.230000
2007-11-21 23:39:25.390 ================= Crystal CAPID calibration end ==================

2007-11-21 23:39:25.500 ================== Crystal CAPID check begin =====================
2007-11-21 23:39:25.843 CAP ID = 36, AFC DAC = 0, Freq error = -2424.600000
2007-11-21 23:39:25.843 FAIL: Crystal AFC check: CAP ID = 36, AFC DAC = 0, Freq error PPM = -2.712081, min Freq error PPM = -20.000000, max Freq error PPM = 20.000000

2007-11-21 23:39:26.218 CAP ID = 36, AFC DAC = 8000, Freq error = 2132.800000
2007-11-21 23:39:26.218 FAIL: Crystal AFC check: CAP ID = 36, AFC DAC = 8000, Freq error PPM = 2.385682, min Freq error PPM = -20.000000, max Freq error PPM = 20.000000

san_water

哎，再次很失望，居然没有人帮忙解答！[em11]

san_water

问题终于解决了！

ttn3040

楼主能不能告诉我们怎么解决的  我们也是AFC校准不过[em03][em03]

ttn3040

而且问题很怪异
用MTK的META ,AFC校准可以通过,CAPID=22,SLOPE=6.2 很正常
用ATE校准就不能通过

ttn3040

用META的AFC SWEEP扫 发现频率不是线形的 NND[em13][em13]

san_water

你最好还是把校准报告发上来看看，这样比较具体，呵呵!

szhedong

请问楼主,你的问题是怎么解决的?是不是因为crystal可调范围太小而换了晶体就好了?

rubyring

MT6139是crystal的晶体，在使用ate校准时要选择该项。另外，mtk发布的一些ATE版本，在设置CMU时，对一些平台的training sequence设置的不对，需要修改代码。最好使用最新的ate版本。

sansiwu

请问10楼的，哪个版本以后的ATE可以解决这个问题？谢谢

zhangshun

晶体的问题! CAP-ID=36已经很高了![em10]

xu3314334

crystal  AFC calibration