8163A/B, 8164A/B, 8166A/B User’s Guide 379
Error Messages 14
error message Out of specification
description The unit has been found outside the specification.This may happen due to various reasons.
affected modules TLS
action Please run LambdaZero from the menu first. If the failure persists, reboot the mainframe and run realign
from the menu. If this does not help, please return the unit to your local service center for repair.
error message Duty cycle out of range
description The power control loop cannot control the correct output power anymore, because the duty cycle of the
external modulation is too small.
affected modules TLS
action Increase the duty cycle (that is, increase the on-state duration of the modulated signal)
error message Beampath safety error
description A problem on the module has lead to an unsafe operation state. For this reason, the shutter has been
closed.
affected modules All attenuators
action If this problem occurs several times, please send the module to the local Keysight service center for repair.
error message Module communication error
description There was an error in communication between module and mainframe. For safety reasons, the module was
disabled and the shutter closed.
affected modules All attenuators
action If this problem occurs several times, please send the module to the local Keysight service center for repair.
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