1 最好先调试出523 能够操作TypeA 卡，程序可能从522 移植。

2 读A 卡成功以后，在进行读B 卡之前要先确认下读卡天线的质量，包括调制幅度，调制系数。

调制幅度主要是跟C2 关系比较大，这个要耐心调节，一般情况下调节好后能有10V 左右的调制幅度

（单边），这个跟天线的大小等因素有关系。如果有网络分析仪那是最好不过的。

调制系数根据14443 协议一般是要10 左右（8 -14 ），这个要配合天线调试。相关的寄存器-A good idea to be able to operate TypeA commissioning of 523 cards, the program may from 522 transplant. A card reading after two successful, first confirm the quality of the reader antenna under Before Reading B cards, including modulation amplitude modulation factor. Modulation amplitude is mainly C2 relationship with relatively large, the adjustment to be patient, to have around 10V modulation amplitude (unilateral) After adjustment under normal circumstances, with the size of the antenna and other factors are related. If there is a network analyzer that is the best thing. 14443 modulation factor according to the agreement is generally about 10　(8 -14 ), this should match the antenna to debug. Associated registers