The Error/Alarm menu includes all of the errors and alarms that can be added to the transmission path. Press the Error/Alarm main menu to access the menu.

Submenu keys for the Error/Alarm Menu are described in section T3 Error/Alarm Menu.

To add an error to the transmission path, press Error Ins Setup to choose an error type. For example, press DS3 Frame Bit Error to insert errors into the framing bits. A burst between 1 and 1000 can be selected by pressing the DS3 Frame Bit Error submenu key again and then the Burst submenu key. After the burst size is set, the Error Insert On/Off submenu key is used to turn the burst on.

Valid BER (Bit Error Rate) 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 Error Insert On keeps errors adding. Pressing Error Insert Off stops the errors.

To add an alarm to the transmission path, press Alarm Ins Setup to choose an alarm type. For example, press DS3 AIS Alarm and then press Alarm Insert Off/On until “On” is underlined. Data is replaced with the AIS alarm signal.

When the AIS is turned ON, the data is replaced with properly framed 1010... pattern.

The remote alarm indication is a signal that 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.

When Idle Alarm is pressed, the data is replaced with a properly framed 1100... pattern.