| 摘要 |
PURPOSE:To attain easily and simply the test by controlling plural number of switches in a radio equipment, and making a microprocessor control to set corresponding transmission/receiving frequencies. CONSTITUTION:Test switches 10-1-10-3 are provided corresponding to each frequency of an upper end, a central part and a lower end of the operating frequency band respectively. Turning on the switch 10-1, a terminal of an I/O port 8 connected to the switch is grounded, and a CPU7 scanning the terminals generates frequency information of the format corresponding to a specific channel of the upper end of the band based on the internal storage. Then, the radio equipment transmits/receives the specific channel, allowing to check the characteristic at transmission/receiving by a conventional measuring device. Since the check is executed similarly to other channels, the specific frequency is set without any special device, allowing to execute easily the test. |
