What is the reason that the laser tube cannot start up normally after it has been unused for more than one week? What should be done in this case?
If the laser tube has been unused for more than one week, it may not be able to perform pre-ionization when it starts to use. In this case, the laser control circuit will detect a high backward reflection voltage, which will result in ‘SWR error’ & ‘Laser OK / Fault’, and cause the laser tube to fail to start normally. Therefore, in order to avoid from triggering SWR errors, it is recommended to adjust the duty cycle of the modulation…