MTK WCDMA校准后功率不平整问题求解
05-08
大家好，最近在用META做WCDMA BAND1 APC校准时，发现校准PASS后，实际的功率高中低信道差别较大为21.2dBm--23.5dBm--21.7dBm，功率很不平。META测试了PA的饱和功率能达到25.5dBm以上，即PA输出功率没有问题。
主板采用中频为MT6162,PA为JAV5501，无需DCDC供电。PA的指标和RF7241差不多。
我的校准配置.cfg文件中相关的段落如下：
WCDMA_TPC_CAL_POWER_INDEX_FOR_PGA_MIDDLE_PA_MODE = 18
WCDMA_TPC_DELTA = 0.5
WCDMA_TPC_POWER_DETECTOR_CHECK_INDEX = 5
WCDMA_TPC_POWER_DETECTOR_ERROR_RANGE =0.5
; specify the number of subband calibration by PA mode
; num = 1: PA High mode
; num = 2: PA High,Middle mode
; num = 3: PA High,Middle,Low mode
WCDMA_TPC_PA_MODE_SUBBAND_CAL_NUM = 3
; 0: absolute, 1: relative check
WCDMA_TPC_PWR_CHECK_MODE = 1
WCDMA_TPC_PWR_DELTA_FOR_RELATIVE_CHECK = 0.5
WCDMA_PA_MODE_CAL_NUM = 3
; 3 >= WCDMA_PA_MODE_CAL_NUM >= WCDMA_TPC_PA_MODE_SUBBAND_CAL_NUM >=1
BAND1_TPC_UARFCN_UL = 9750
BAND2_TPC_UARFCN_UL = 9400
BAND4_TPC_UARFCN_UL = 1412
BAND5_TPC_UARFCN_UL = 4183
BAND8_TPC_UARFCN_UL = 2787
BAND1_TPC_WANTED_P_OFFSET = -1.5
BAND2_TPC_WANTED_P_OFFSET = -2.0
BAND4_TPC_WANTED_P_OFFSET = -1
BAND5_TPC_WANTED_P_OFFSET = -1.5
BAND8_TPC_WANTED_P_OFFSET = -1
校准配置.ini文件中相关的段落如下：
[WCDMA BAND1 TPC]
Start1=12
End1=14
Start2=22
End2=24
VGA DAC, PA high mode=296,225
VGA DAC, PA middle mode=238,225
VGA DAC, PA low mode=161,226
PA OCTLEVEL Sections=8
PA OCTLEVEL PA Phase Compensation=0,0,0
PA OCTLEVEL PMU Level PA Mode=H,H,H,H,H,M,M,L
PA OCTLEVEL PMU Level Prf=24,22,20,18,15,11,6,0
PA OCTLEVEL PMU Level Dc2Dc=3.4V,3.0V,2.6V,2.4V,2.2V,2.0V,1.8V,1.5V,
PA OCTLEVEL PMU Level VBias=0,0,0,0,0,0,0,0
PA OCTLEVEL PMU Level Vm1=0,0,0,0,0,1,1,1
PA OCTLEVEL PMU Level Vm2=0,0,0,0,0,0,0,1
PA OCTLEVEL PMU Level PA Gain=22.65625,22.37500,21.84375,21.37500,20.87500,19.68750,19.56250,14.656250
DC2DC LEVEL0=1.225V
DC2DC LEVEL1=3.400V
校准的log文件如附件。
向PA供应商请教，回复为在PA High mode Subband calibration时所用的TPC Index=9，致使功率太低只有13.5dBm（BAND1_TPC_WANTED_P_OFFSET = -1.5 期望校准PA High Mode时能在20dBm左右进行。
如果这个说法正确，应该在哪里修改校准是采用的TPC Index值呢?
或者是其他的原因比如配置文件参数异常造成的?
请高手指教，谢谢。
校准的log文件如下，不能上传附件，只能贴在这里了。
[PA Gain calibration]
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 0 725 24.81625 22.5 0.5
0 9750 0 0 799 23.63036 22.5 0.5
0 9750 0 0 835 22.73019 22.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 2 716 23.91599 20.5 0.5
0 9750 0 2 825 20.99055 20.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 4 699 22.87024 18.5 0.5
0 9750 0 4 838 19.16339 18.5 0.5
0 9750 0 4 859 18.66454 18.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 6 684 21.52335 16.5 0.5
0 9750 0 6 844 17.33992 16.5 0.5
0 9750 0 6 870 16.61238 16.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 9 668 19.46281 13.5 0.5
0 9750 0 9 858 14.23589 13.5 0.5
0 9750 0 9 881 13.53358 13.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 1 13 630 6.332672 9.5 0.5
0 9750 1 13 528 9.628937 9.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 1 18 626 1.759064 4.5 0.5
0 9750 1 18 538 4.466568 4.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 2 24 469 -9.009369 -1.5 0.5
0 9750 2 24 228 -1.660721 -1.5 0.5
[Coupler Loss calibration]
Band UARFCN PA mode TPC Index Coupler Loss TX Power PD Report Evaluated Coupler Loss
0 9750 0 13 225 10.05995 2927 225
0 9750 1 18 225 4.43219 2859 197
0 9750 2 23 226 -0.673172 2711 194
[Subband calibration]
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 0 9612 9 13.83047 2948 3.61383 N/A
0 0 9634 9 13.83047 2953 3.57301 N/A
0 0 9656 9 13.83047 2964 3.34573 N/A
0 0 9678 9 13.83047 2976 2.95185 N/A
0 0 9700 9 13.83047 2997 2.19897 N/A
0 0 9722 9 13.83047 3016 1.41946 N/A
0 0 9766 9 13.83047 3044 -0.17368 N/A
0 0 9788 9 13.83047 3041 -0.37197 N/A
0 0 9810 9 13.83047 3032 0.10733 N/A
0 0 9832 9 13.83047 3024 0.84611 N/A
0 0 9854 9 13.83047 3020 1.72409 N/A
0 0 9876 9 13.83047 3023 2.34368 N/A
0 0 9888 9 13.83047 3023 2.52339 N/A
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 1 9612 18 4.251083 2660 1.828949 0.797134
0 1 9634 18 4.251083 2660 1.866851 0.759232
0 1 9656 18 4.251083 2668 1.820984 0.555099
0 1 9678 18 4.251083 2681 1.658096 0.311737
0 1 9700 18 4.251083 2700 1.178894 0.197189
0 1 9722 18 4.251083 2724 0.633102 -0.007019
0 1 9766 18 4.251083 2755 -0.622864 0.280197
0 1 9788 18 4.251083 2747 -0.810074 0.717407
0 1 9810 18 4.251083 2731 -0.515458 0.922791
0 1 9832 18 4.251083 2707 -0.025757 1.18309
0 1 9854 18 4.251083 2695 0.605789 0.926544
0 1 9876 18 4.251083 2700 1.065567 0.310516
0 1 9888 18 4.251083 2702 1.179245 0.134338
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 2 9612 24 -1.659958 2480 1.603836 N/A
0 2 9634 24 -1.659958 2478 1.702972 N/A
0 2 9656 24 -1.659958 2482 1.762039 N/A
0 2 9678 24 -1.659958 2492 1.687897 N/A
0 2 9700 24 -1.659958 2510 1.317856 N/A
0 2 9722 24 -1.659958 2531 0.839188 N/A
0 2 9766 24 -1.659958 2560 -0.490585 N/A
0 2 9788 24 -1.659958 2564 -0.887726 N/A
0 2 9810 24 -1.659958 2550 -0.746964 N/A
0 2 9832 24 -1.659958 2532 -0.293839 N/A
0 2 9854 24 -1.659958 2518 0.387619 N/A
0 2 9876 24 -1.659958 2518 0.937988 N/A
0 2 9888 24 -1.659958 2521 1.111999 N/A
主板采用中频为MT6162,PA为JAV5501，无需DCDC供电。PA的指标和RF7241差不多。
我的校准配置.cfg文件中相关的段落如下：
WCDMA_TPC_CAL_POWER_INDEX_FOR_PGA_MIDDLE_PA_MODE = 18
WCDMA_TPC_DELTA = 0.5
WCDMA_TPC_POWER_DETECTOR_CHECK_INDEX = 5
WCDMA_TPC_POWER_DETECTOR_ERROR_RANGE =0.5
; specify the number of subband calibration by PA mode
; num = 1: PA High mode
; num = 2: PA High,Middle mode
; num = 3: PA High,Middle,Low mode
WCDMA_TPC_PA_MODE_SUBBAND_CAL_NUM = 3
; 0: absolute, 1: relative check
WCDMA_TPC_PWR_CHECK_MODE = 1
WCDMA_TPC_PWR_DELTA_FOR_RELATIVE_CHECK = 0.5
WCDMA_PA_MODE_CAL_NUM = 3
; 3 >= WCDMA_PA_MODE_CAL_NUM >= WCDMA_TPC_PA_MODE_SUBBAND_CAL_NUM >=1
BAND1_TPC_UARFCN_UL = 9750
BAND2_TPC_UARFCN_UL = 9400
BAND4_TPC_UARFCN_UL = 1412
BAND5_TPC_UARFCN_UL = 4183
BAND8_TPC_UARFCN_UL = 2787
BAND1_TPC_WANTED_P_OFFSET = -1.5
BAND2_TPC_WANTED_P_OFFSET = -2.0
BAND4_TPC_WANTED_P_OFFSET = -1
BAND5_TPC_WANTED_P_OFFSET = -1.5
BAND8_TPC_WANTED_P_OFFSET = -1
校准配置.ini文件中相关的段落如下：
[WCDMA BAND1 TPC]
Start1=12
End1=14
Start2=22
End2=24
VGA DAC, PA high mode=296,225
VGA DAC, PA middle mode=238,225
VGA DAC, PA low mode=161,226
PA OCTLEVEL Sections=8
PA OCTLEVEL PA Phase Compensation=0,0,0
PA OCTLEVEL PMU Level PA Mode=H,H,H,H,H,M,M,L
PA OCTLEVEL PMU Level Prf=24,22,20,18,15,11,6,0
PA OCTLEVEL PMU Level Dc2Dc=3.4V,3.0V,2.6V,2.4V,2.2V,2.0V,1.8V,1.5V,
PA OCTLEVEL PMU Level VBias=0,0,0,0,0,0,0,0
PA OCTLEVEL PMU Level Vm1=0,0,0,0,0,1,1,1
PA OCTLEVEL PMU Level Vm2=0,0,0,0,0,0,0,1
PA OCTLEVEL PMU Level PA Gain=22.65625,22.37500,21.84375,21.37500,20.87500,19.68750,19.56250,14.656250
DC2DC LEVEL0=1.225V
DC2DC LEVEL1=3.400V
校准的log文件如附件。
向PA供应商请教，回复为在PA High mode Subband calibration时所用的TPC Index=9，致使功率太低只有13.5dBm（BAND1_TPC_WANTED_P_OFFSET = -1.5 期望校准PA High Mode时能在20dBm左右进行。
如果这个说法正确，应该在哪里修改校准是采用的TPC Index值呢?
或者是其他的原因比如配置文件参数异常造成的?
请高手指教，谢谢。
校准的log文件如下，不能上传附件，只能贴在这里了。
[PA Gain calibration]
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 0 725 24.81625 22.5 0.5
0 9750 0 0 799 23.63036 22.5 0.5
0 9750 0 0 835 22.73019 22.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 2 716 23.91599 20.5 0.5
0 9750 0 2 825 20.99055 20.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 4 699 22.87024 18.5 0.5
0 9750 0 4 838 19.16339 18.5 0.5
0 9750 0 4 859 18.66454 18.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 6 684 21.52335 16.5 0.5
0 9750 0 6 844 17.33992 16.5 0.5
0 9750 0 6 870 16.61238 16.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 0 9 668 19.46281 13.5 0.5
0 9750 0 9 858 14.23589 13.5 0.5
0 9750 0 9 881 13.53358 13.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 1 13 630 6.332672 9.5 0.5
0 9750 1 13 528 9.628937 9.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 1 18 626 1.759064 4.5 0.5
0 9750 1 18 538 4.466568 4.5 0.5
Band UARFCN PA mode TPC Index PA Gain TX Power Target Power delta
0 9750 2 24 469 -9.009369 -1.5 0.5
0 9750 2 24 228 -1.660721 -1.5 0.5
[Coupler Loss calibration]
Band UARFCN PA mode TPC Index Coupler Loss TX Power PD Report Evaluated Coupler Loss
0 9750 0 13 225 10.05995 2927 225
0 9750 1 18 225 4.43219 2859 197
0 9750 2 23 226 -0.673172 2711 194
[Subband calibration]
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 0 9612 9 13.83047 2948 3.61383 N/A
0 0 9634 9 13.83047 2953 3.57301 N/A
0 0 9656 9 13.83047 2964 3.34573 N/A
0 0 9678 9 13.83047 2976 2.95185 N/A
0 0 9700 9 13.83047 2997 2.19897 N/A
0 0 9722 9 13.83047 3016 1.41946 N/A
0 0 9766 9 13.83047 3044 -0.17368 N/A
0 0 9788 9 13.83047 3041 -0.37197 N/A
0 0 9810 9 13.83047 3032 0.10733 N/A
0 0 9832 9 13.83047 3024 0.84611 N/A
0 0 9854 9 13.83047 3020 1.72409 N/A
0 0 9876 9 13.83047 3023 2.34368 N/A
0 0 9888 9 13.83047 3023 2.52339 N/A
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 1 9612 18 4.251083 2660 1.828949 0.797134
0 1 9634 18 4.251083 2660 1.866851 0.759232
0 1 9656 18 4.251083 2668 1.820984 0.555099
0 1 9678 18 4.251083 2681 1.658096 0.311737
0 1 9700 18 4.251083 2700 1.178894 0.197189
0 1 9722 18 4.251083 2724 0.633102 -0.007019
0 1 9766 18 4.251083 2755 -0.622864 0.280197
0 1 9788 18 4.251083 2747 -0.810074 0.717407
0 1 9810 18 4.251083 2731 -0.515458 0.922791
0 1 9832 18 4.251083 2707 -0.025757 1.18309
0 1 9854 18 4.251083 2695 0.605789 0.926544
0 1 9876 18 4.251083 2700 1.065567 0.310516
0 1 9888 18 4.251083 2702 1.179245 0.134338
Band PA mode UARFCN TPC Index Reference Power PD Report PA Compensation Coupler Compensation
0 2 9612 24 -1.659958 2480 1.603836 N/A
0 2 9634 24 -1.659958 2478 1.702972 N/A
0 2 9656 24 -1.659958 2482 1.762039 N/A
0 2 9678 24 -1.659958 2492 1.687897 N/A
0 2 9700 24 -1.659958 2510 1.317856 N/A
0 2 9722 24 -1.659958 2531 0.839188 N/A
0 2 9766 24 -1.659958 2560 -0.490585 N/A
0 2 9788 24 -1.659958 2564 -0.887726 N/A
0 2 9810 24 -1.659958 2550 -0.746964 N/A
0 2 9832 24 -1.659958 2532 -0.293839 N/A
0 2 9854 24 -1.659958 2518 0.387619 N/A
0 2 9876 24 -1.659958 2518 0.937988 N/A
0 2 9888 24 -1.659958 2521 1.111999 N/A
小编，后来这个问题解决没?要是功率回退的问题的话，那么MTK只有新出的四核的才可以支持修改功率回退啊
我也想知道答案，大牛出来解释一下吧
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