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Table Of Contents
RTL8822CE RTL8822CU RTL8822CS COB TSSI MP FLOW
©2019 Realtek Semiconductor Corp.
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3.1.5.4.1. Interpolation for finding Tx index
Theoretically, we need to measure all value defined in eFuse to calibrate the Tx power level.
But since it needs too much time, we only measure several channels with MCS7-B40 signal and
figure out the other non-measured value by interpolation method.
Usually, the recommended measured channels are listed below:
2G Band
5G Band1
5G Band2
5G Band3
5G Band4
CH4
CH10
CH38
CH46
CH54
CH62
CH102
CH126
CH142
CH151
CH175
Table 4: The recommended measured channel for Tx power calibration
Example : If the measured Tx index in CH4 is 1 and the measured Tx index in CH10 is 3, all 2G
group MCS7-B40 TSSI DE is shown as below:
CH4 is group 2, CH10 is group 4.
Group 1
Group 2
Group 3
Group 4
Group 5
70
(Calculated by
Interpolation)
71
(Measured)
72
(Calculated by
Interpolation)
73
(Measured)
74
(Calculated by
Interpolation)
Table 5: The example of finding Tx index in 2G band by interpolation
We have measured all groups of 5G band 1 and 5G band 2, so just use the interpolation for
5G band 3 and 5G band4.