The Error/Alarm screen includes all of the errors and alarms that can be added to the transmission path. Press the
Error/Alarm main menu key to display the Error/Alarm menu.
Bit Error: Inserts errors in the BER pattern. Bit errors can be selected by pressing
Bit Error. A burst between 1 and 1000 can be selected by pressing the
Bit Error submenu key. The
Error Off/On submenu key is used to turn the burst ON or OFF.
BER (Bit Error Rate): Errors can be added to the transmission path by pressing the
BER submenu key. Valid bit errors can be quickly set by pressing a preset submenu key:
1E–2, 1E–3, 1E–4, 1E–5, 1E–6, and 1E–7. For preset BER rates, refer to
Table: “Bit Error Rates”. Pressing the
Error Off/On submenu key turns the error signal
ON (keeps adding errors) or
OFF (stops the errors).
BPV: In a bipolar signal, this is a rule violation in which a 1 (mark or pulse) has the same polarity as the previous 1 (mark or pulse). A burst between 1 and 1000 can be selected by pressing the
BPV submenu key.
Frame Bit Error: Inserts errors in the framing bits. Frame Bit errors can be selected by pressing
Frame Bit Error. A burst between 1 and 1000 can be selected by pressing the
Burst submenu key. The
Error On/Off submenu key is used to turn the burst ON or OFF.
AIS Alarm On/Off: When the AIS (Alarm Indication Signal) alarm is turned ON, the data is replaced with an unframed signal of all ones. AIS is also called the Blue Alarm.
RAI Alarm On/Off: When the RAI (Remote Alarm Indication) alarm is turned ON, a signal is transmitted from the terminal equipment in the outgoing direction when it determines that it has lost the incoming signal, or when it receives an AIS signal in the incoming direction. RAI is also called the Yellow Alarm.
Error Off/On: This submenu key turns the error signal ON or OFF.
