The rear card composed of four odules . They are: asynchronous serial port interface module ,ADC control odule ,ECG signal process module and gate control data produce module .
后面板采集卡从总体物理上主要有四块电路组成:485串行通信电路，ADC控制电路，心电数据处理电路和门控信号产生电路。
参考来源 - PET系统中数据采集模式的实现·2,447,543篇论文数据，部分数据来源于NoteExpress
A serial port interface can be used to take control of the power supply, to set G1, G2 and G3 voltages, to select the XRII field, or to measure back the real electrode voltages (see chapter4).
一个串行端口接点可被用来控制电源，设定G 1, G2和G3电压，选择X线影像增强器视野，或延迟测量实际极间电压(看第4章)。
The most obvious issue is that the interface in Listing 6 requires a JNI call for each bit set or retrieved, as well as a JNI call to read a byte from, or write a byte to, the serial port.
最显著的一个问题就是，清单6中的接口在设置或检索每个位，以及从串行端口读取字节或者向串行端口写入字节都需要一个JNI调用。
For example, if we want to provide an interface to a serial port using JNI, we could come up with two different interfaces. One version is in Listing 6.
举例来说，如果我们希望使用JNI为某个串行端口提供接口，则可以构造两种不同的接口。
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