Tektronix 071-0855-05 user manual Anomaly Insertion and Through Mode

Operating Basics: User Interface

Anomaly Insertion

Figure 2-22: Anomaly Insertion of the Error Insertion menu

The anomaly insertion section of the error insertion menu, as shown in Figure 2-22, provides all controls for inserting anomalies. The Anomaly Insertion Setup, shown to the left of the example (Figure 2-22), provide menus for anomaly insertion setup. The Current Anomaly Insertion and Insertion Control, shown to the right, supply information on the current insertion state and provide the insertion controls.

To select the type of anomaly injected, use the pull-down menu labeled Type under Anomaly Insertion Setup. The anomaly types available are B1 BIP, B2 BIP, B3 BIP, MS REI (REI-L), Payload Bit, Random Bit, REI-P, and Random Bit (SPE only). To choose an anomaly rate, click on the arrows or highlight and type in the boxes labeled Rate. Or click on the Max Rate button to inject the maximum rate.

NOTE: For these changes to take place, the Apply Anomaly Setup Changes button must be clicked. The Current Anomaly Insertion settings will then reflect the new changes.

The ability to insert single B2 anomalies in either the first B2 only or the first B2 in each STM- n/OC-n structure can also be selected by clicking the appropriate radio button.

To start the anomaly injection, click one of the buttons under Insertion Control.

•Insert Single – Clicking on this button will inject a single anomaly of the type reflected under Current Anomaly Insertion.

•Start Continuous Insertion – Clicking on this button will inject a continuous insertion of the anomaly type reflected under Current Anomaly Insertion at the indicated rate.

Anomaly Insertion and Through Mode

When inserting an anomaly in through mode, the user must check the appropriate overwrite box for the anomaly type. For example, to insert a B1 or B2 error, the Regenerate B1/B2 Parity box must be selected or the error will have no effect. The list of available anomaly types is dependent upon the overwrite controls enabled. Thus, if no overwrite controls are selected, the anomaly list will be quite short.

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