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.
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.
