APC校准失败的可能原因

05-08

请问各位大虾APC校准失败的可能原因 ?
ATE Tool Version:3.2.0
Part Number:
Serial Number: MTK00000001
Revision: W04.06
Batch: 01
Bar Code: 88888888888888888888
Error Code: 303,PCL19
------------
Enter into META Mode OK
IP2 Calibration time=0.000000
AFC Calibration OK
Slope=2.976429
Use Default Value=3913
AFC Calibration time=1.000000
Path Loss GSM TCH 15 PathLoss 1.375000 Calibration Pass
Path Loss GSM TCH 30 PathLoss 1.000000 Calibration Pass
Path Loss GSM TCH 45 PathLoss 0.875000 Calibration Pass
Path Loss GSM TCH 60 PathLoss 1.000000 Calibration Pass
Path Loss GSM TCH 75 PathLoss 1.125000 Calibration Pass
Path Loss GSM TCH 80 PathLoss 1.000000 Calibration Pass
Path Loss GSM TCH 100 PathLoss 1.125000 Calibration Pass
Path Loss GSM TCH 124 PathLoss 1.500000 Calibration Pass
Path Loss GSM TCH 975 PathLoss 1.625000 Calibration Pass
Path Loss GSM TCH 1000 PathLoss 1.875000 Calibration Pass
Path Loss GSM TCH 1023 PathLoss 1.250000 Calibration Pass
Path Loss DCS TCH 550 PathLoss 0.750000 Calibration Pass
Path Loss DCS TCH 590 PathLoss 0.750000 Calibration Pass
Path Loss DCS TCH 620 PathLoss 0.250000 Calibration Pass
Path Loss DCS TCH 650 PathLoss -0.125000 Calibration Pass
Path Loss DCS TCH 680 PathLoss -0.375000 Calibration Pass
Path Loss DCS TCH 710 PathLoss -0.250000 Calibration Pass
Path Loss DCS TCH 740 PathLoss 0.000000 Calibration Pass
Path Loss DCS TCH 770 PathLoss 0.500000 Calibration Pass
Path Loss DCS TCH 810 PathLoss 0.875000 Calibration Pass
Path Loss DCS TCH 850 PathLoss 1.000000 Calibration Pass
Path Loss DCS TCH 885 PathLoss 0.750000 Calibration Pass
Path Loss Calibration OK
Pathloss Calibration time=6.000000
OffsetIQ[0], Original_Offset:-34.67 ,POOS:0.00034
OffsetIQ[1], Original_Offset:-30.47 ,POOS:0.00090
OffsetIQ[2], Original_Offset:-25.99 ,POOS:0.00252
OffsetIQ[3], Original_Offset:-24.12 ,POOS:0.00387
Evaluate OffsetI:8,OffsetQ:7
Original Offset:-41.41 < -40.00 PASS
APC Calibration time=13.000000
校准到此处就FAIL了

对于APC的问题，虽然我不会了解小编的RF Schematic,但大凡APC问题，分为两部分：
1。PA TABLE
2。 POWER AMPLIFIER PART
一般1的可能比较少
2一般都因PA运算相关输入与反馈电路出的问题。所以你可以做一下参考

下面就是APC了
先是GSM某PCL下发射功率（通常GSM 3个、DCS 3个），通过这个功率得到对应的PA电压，一般第一项应该是1.0～1.5V，你在这一步的时候就有问题了，可能是RF信号功率根本达不到期望值（PA发射功率不够大，甚至根本没发射）

首先要分析是设备的问题还是程序的问题还是板子问题.
1.先要做个交叉实验证明你的设备没有问题,还有射频线等
2.从新校准
3.在分析是板子问题还是程序问题

是的，有可能是PA失效。建议小编找供应商要几个样品换上去试一下。

APC Calibration fail

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