Receiving unit for use with controller, has optical received power determination unit with comparator comparing measured characteristic variable with stored characteristic to get measurement data and passing data to output port

摘要

The unit has a measurement arrangement (6) finding a characteristic variable of optical received power. Optical received power determination unit (8) has a memory unit in which a characteristic is stored. The characteristic represents relationship between the variable and the power. The unit (8) with a comparator compares the variable with the characteristic to get measurement data, and passing the data to an output port. An independent claim is also included for a controller coupled to an optical bus system.