![](/images/new-backgrounds/1319190/319190195x1.webp)
Using the Analyzer
To Inject Alarms and Errors
To Inject ATM and AAL errors
1Click the Errors tab.
2Select the channel(s) on which to simulate
5Click the bits you want to error.
6Click the On button to start injecting errors, or click the Error On For or the Error Off For button to transmit errors for a specified number of cells.
3Select the type of error.
4If required, select the part of the cell to error.
Watch the results of the injected alarms or errors. The numbers of errors and OAM cells injected is shown at the top of the Protocol Alarms/Errors window. If you are using an external loopback or transmit loopback mode, you can also monitor the errors and alarms by watching the Alarm and Error indicators at the top of the main screen.