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850M校准的问题
手动用META测试,发现通过自己调是可以将频偏调到规定范围之内的,板子应该没有问题。
请问还有什么可能,会造成这种错误呢?检查过器件应该都没贴错。
CFG文件弄错了,
[AFC Calibration]
;AFC_BAND: GSM, DCS, PCS, GSM850
AFC_BAND = GSM
AFC_ARFCN = 65
N_AFC = 10
DAC1=4000
DAC2=5000
CRYSTAL_DAC1=3800
CRYSTAL_DAC2=4200
AFC校准一般是上面这个文件,把AFC_BAND = GSMAFC_ARFCN = 65 改成AFC_BAND = GSM850AFC_ARFCN = 190
下面还有好几个,也把他们改一下。
另外
bank = 0x0C
;bank = 0x02
;bank = 0x1E
;bank = 0x1C
;bank = 0x1A
; GSM450 0x01
; GSM850 0x02
; GSM900 0x04
; DCS1800 0x08
; PCS1900 0x10
这个也要选对。
这个我改啦,可是还是读不到slope的值
MTK GSM Test Sequence Demo
-------------------------------
Date : 12-16-2000 Time 17:29:54
------------
ATE Tool Version:5.3.7
Part Number:MT6225
Serial Number:000001
Revision:W05.24
Batch:01
Bar Code:12160101840
Error Code:501
------------
Enter into META Mode OK
CAP ID[0]:0,DAC:4096,Freq:17.24(PPM),Center Freq:836.60,Tch:190
CAP ID[1]:63,DAC:4096,Freq:-22.20(PPM),Center Freq:836.60,Tch:190
Crystal CAPID check begin
CAPID=19,AFC DAC=0,FreqErr=-20098.1
PASS: Freq error PPM =-24.0
CAPID=19,AFC DAC=8191,FreqErr=16375.9
PASS: Freq error PPM =19.6
result[0]:-24.0
result[1]:19.6
AFC Calibration Failed,Slop:0.000,min:1.000,max:10.000
Slope=0.000,min:1.000,max:10.000
Use Default Value=0
============GSM850 Band=============
First AFC Tracking:i_DAC1 0
DAC1:0,gain:25,Frequency offset:0
================== TX AFC offset calibration error=====================
AFC Calibration time=46.86(sec)
##
MTK GSM Test Sequence Demo
-------------------------------
Date : 12-16-2000 Time 17:29:54
------------
ATE Tool Version:5.3.7
Part Number:MT6225
Serial Number:000001
Revision:W05.24
Batch:01
Bar Code:12160101840
Error Code:501
------------
CFG文件弄错了,
[AFC Calibration]
;AFC_BAND: GSM, DCS, PCS, GSM850
AFC_BAND = GSM
AFC_ARFCN = 65
N_AFC = 10
DAC1=4000
DAC2=5000
CRYSTAL_DAC1=3800
CRYSTAL_DAC2=4200
AFC校准一般是上面这个文件,把AFC_BAND = GSMAFC_ARFCN = 65 改成AFC_BAND = GSM850AFC_ARFCN = 190
下面还有好几个,也把他们改一下。
另外
bank = 0x0C
;bank = 0x02
;bank = 0x1E
;bank = 0x1C
;bank = 0x1A
; GSM450 0x01
; GSM850 0x02
; GSM900 0x04
; DCS1800 0x08
; PCS1900 0x10
这个也要选对。
2008-12-16 15:42:11
编辑 引用
cageychen 楼主帅哥,离线
等级:研发工程师
帖子:89
经验:460
:80.4
注册:2005-11-5
发短信 | 资料 | BLOG | 引用 | 回复 3#
这个我改啦,可是还是读不到slope的值
2008-12-16 17:31:46
编辑 引用
cageychen 楼主帅哥,离线
等级:研发工程师
帖子:89
经验:460
:80.4
注册:2005-11-5
发短信 | 资料 | BLOG | 引用 | 回复 4#
MTK GSM Test Sequence Demo
-------------------------------
Date : 12-16-2000 Time 17:29:54
------------
ATE Tool Version:5.3.7
Part Number:MT6225
Serial Number:000001
Revision:W05.24
Batch:01
Bar Code:12160101840
Error Code:501
------------
Enter into META Mode OK
CAP ID[0]:0,DAC:4096,Freq:17.24(PPM),Center Freq:836.60,Tch:190
CAP ID[1]:63,DAC:4096,Freq:-22.20(PPM),Center Freq:836.60,Tch:190
Crystal CAPID check begin
CAPID=19,AFC DAC=0,FreqErr=-20098.1
PASS: Freq error PPM =-24.0
CAPID=19,AFC DAC=8191,FreqErr=16375.9
PASS: Freq error PPM =19.6
result[0]:-24.0
result[1]:19.6
AFC Calibration Failed,Slop:0.000,min:1.000,max:10.000
Slope=0.000,min:1.000,max:10.000
Use Default Value=0
============GSM850 Band=============
First AFC Tracking:i_DAC1 0
DAC1:0,gain:25,Frequency offset:0
================== TX AFC offset calibration error=====================
AFC Calibration time=46.86(sec)
##
MTK GSM Test Sequence Demo
-------------------------------
Date : 12-16-2000 Time 17:29:54
------------
ATE Tool Version:5.3.7
Part Number:MT6225
Serial Number:000001
Revision:W05.24
Batch:01
Bar Code:12160101840
Error Code:501
------------
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