The measurement results showed the frequency b e tween 8251A interface circuit s CLK pulse and RxC (TxC) pulse have loose limit r elationship; asynchronous available communication baud rate some times higher th an 19.

Aiming at the construction of hydroelectric project,the task scales of equipments have been overlapped each other,puts forward a precept which is based on the CPLD,microwave communication and micro control unit technologies.

This LNA can be widely used in microwave communication areas.

Fiber- optic Communication with Carrier Wave Communication in High Pressure Circuit Difference Protection of Application Comparison;

Analysed the carrier communication technology based on X-10 protocol,and the principle of chirp modulation spread spectrum based on CEBus protocol.

Due to many drawbacks in handcopying meters, this article mainly describes copying meters in intelligence to copy meters by using of KQ100E,the module of power carrier communication We′ll introduce copying meters in intelligence system about configuration,theory,characters,and talk about the application of KQ100E the module of carrier receiving and transmittin