1. Press the Error/Alarm main menu key to activate the Error/Alarm menu.
2. Press the Bit Error, BER, BPV, or Frame Bit Error submenu key, as applicable to the measurement.
3. Press the AIS Alarm or RAI Alarm submenu key. These two submenu keys toggle between ON and OFF. The alarm status is displayed in the yellow highlighted area of the upper part of the measurement data display.