| 摘要 |
The system tests front panel lights, such as LEDs, on an electronic instrument, the front panel lights being normally used to indicate the status of selected output conditions of the instrument. The system also uses the LEDs to communicate additional information concerning the instrument, in particular the operation of the clock system for the instrument. The system includes a plurality of timers, each timer being associated with one front panel LED. The user sets the timers a specific amount of time (e.g. one second) apart, with each LED being programmed with a different timer. The LEDs light in succession in response to the clock reaching a preselected time. If one or more of the LEDs do not light, failure of the LEDs is indicated. If the LEDs do not light in proper order or at the expected time, investigation of the clock system is indicated.
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