| 摘要 |
PROBLEM TO BE SOLVED: To sense the foretaste of the deterioration of transmission quality by detecting and displaying a transmission quality deterioration state where the data transmission quality of a radio transmission line deteriorates and the maintenance of normal communication is in a difficult transmission state. SOLUTION: A function for counting the number of error counting times and a display function are added to functions for comparing information data and redundant data on a reception side, calculating them and correcting information data. When the transmission state is deteriorated and error data mixed in information data and redundant data, which are received in a reception-side device, are detected and corrected, whether there has been several error data bits or not is counted. When the number is to exceed an error correction limit, the effect is displayed on LED on a transmission device and the message of the deterioration of transmission quality is displayed on the screen of the data display device. |
