How can you judge if there is ambient lighting disturbance?

There is a red indication light on the top of the signal receiver.This indication light will be stable when there is no optical signal communicated from the E-Pen. When the receivers detects optical signals, it will flash. If there is no optical signal being transmitted from the E-Pen and the indication light keeps flashing, that means there is ambient lighting theres disturbance. In the case of positioning calibration failure, cursor fluctuating .unpredictable lines appearing, check the indication light on the signal receiver first. One simple way into find out the cause is to cover the front panel of the signal receiver with your hand. The in dication light should stop flashing. This indicates the device is functioning properly. The of signal reception failure is due to ambient disturbance. Otherwise, the device may be word defective.Seek help with product distributor or .

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