关于手机射频校准

05-08

在射频测试工位，校准都能正常通过，等到开始综测时，手机电流上不去，MOBILE_CAMP_GSM测试项就通不过，请问是什么原因?如何解决呢?补充：电源用的是Motech

手机电流上不去?
手机能正常开机吗?

手动开机试试。

电源限流了 ?

当然限流设置那是肯定要的，不过设置1.5A，不影响开机的。另外，校准时是可以开机的，要不然怎么通信呢?！就是在综测开始，手机与CMU同步时电流上不去
S$$5002401*MTK_ADC_Slope,5512.00 &5250.00 $5600.00 N5425.00 M
S$$5002402*MTK_ADC_Offset,16.00 &-1000000.00 $1000000.00 N0.00 M
S！%5002403*MTK_ADC_Save_ADC_Slope_Offset,0.00 &0.00 $0.00 N0.00 M
S$$5002404*MTK_ADC_CurrDiff,0.00 &0.00 $0.04 N0.02 M
S$$5002405*MTK_ADC_VoltageDiff,0.00 &0.00 $0.04 N0.02 M
S！%50024*MTK_ADC,0.00 &0.00 $0.00 N0.00 M
S！%20028*DELAY_0S,0.00 &0.00 $0.00 N0.00 M
S！%50004*DISCONNECT_WITH_TARGET,0.00 &0.00 $0.00 N0.00 M
S！%30000*SWITCH_POWER_OFF,0.00 &0.00 $0.00 N0.00 M
S！%50002*PHASE_RESET_TESTSET,0.00 &0.00 $0.00 N0.00 M
S！%20028*DELAY_0S,0.00 &0.00 $0.00 N0.00 M
S！%30001*SWITCH_POWER_ON,0.00 &0.00 $0.00 N0.00 M
S！%70001*CALL_SETUP_GSM_DCS,0.00 &0.00 $0.00 N0.00 M
S！%30012*CONFIG_TESTSET_NETWORK,0.00 &0.00 $0.00 N0.00 M
S！%30013*OPEN_TESTSET_ACTON,0.00 &0.00 $0.00 N0.00 M
S！%20032*DELAY_10S,0.00 &0.00 $0.00 N0.00 M
S！%70002*MOBILE_CAMP_GSM,1.00 &0.00 $0.00 N0.00 M
S！%20028*DELAY_0S,0.00 &0.00 $0.00 N0.00 M
S！%50003*PHASING_SETUP,0.00 &0.00 $0.00 N0.00 M
S！%30000*SWITCH_POWER_OFF,0.00 &0.00 $0.00 N0.00 M
S！%20002*OPEN_PARALLEL_FIXTURE,0.00 &0.00 $0.00 N0.00 M

找到原因了，好像motech电源带负载能力不行，在供电两端加了个大电容，问题就解决了

负载能力跟加大电容有啥关系啊,电容顶多让电源输出平稳些.
校准模式是非完全开机状态,综测试开机,电流瞬间可能到2mA, 1.5A的limit并不合适.
同步不上去,跟BS single强度,外界信号干扰等都是有关系的.

学习了。

是的，不明白?小编说清楚啊

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