CDMA 850 is CDMA technology operating in the Cellular (850 MHz) frequency band. Before the existence of GSM 850, the Cellular band was often referred to as the "800 MHz" band. "850 MHz" implies a ...

常规通信信号包括模拟调制信号，如AM、FM，数字调制信号如2ASK、2PSK、QPSK、2FSK、8FSK等，扩频（特殊） 通信包括 DS-SS、FH-SS、QAM、FDMA、CDMA、TDMA 等。一般而言，常规通信信号测频比特殊通信信号的测频容易。扩频通信信号的测频比较困难，特别是跳频和跳时扩频 ...

5G bands 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA - International 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 ...

Samsung Galaxy Core Prime The phone comes with a 4.50-inch touchscreen display offering a resolution of 480x800 pixels at a pixel density of 207 pixels per inch (ppi). Samsung Galaxy Core Prime is ...

The Lumia 950 XL Dual SIM by Microsoft is the company’s platform for showcasing Windows 10 Mobile in all its glory. The phone looks a bit bland and the plastic body isn’t very flagship-like, but if ...

4G bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 38, 39, 40, 41, 66 - International 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39 ...

其功能是从指定地址开始，定义一个存储区，以备源程序使用。 存储区预留的存储单元数由表达式的值决定。 TMP: DS 1 从标号TEP地址处开始保留1个存储单元（字节）。 其功能用于给字符名称定义位地址。 SPK BIT P3.7 经定义后，允许在指令中用SPK代替P3.7。