Tektronix 071-0855-05 user manual J0 Multi-Byte Trace, Transmitter J0 Trace dialog box

Operating Basics: User Interface

J0 Multi-Byte Trace

J0 Trace provides a capability to uniquely identify each of the multiple channels being carried in a Dense Wave Division Multiplexer (DWDM) system, providing an end-to-end continuity check. Since only the SONET framing byte plus J0 are in the unscrambled overhead of the SONET signal, it is possible to extract for display the J0 trace to confirm channel ID.

The OTS9100 has the ability to generate unique J0 traces. This allows test signals to be easily identified, or to simulate network-element generated traffic without the Trace Identifier Mismatch (TIM) alarm being generated. The OTS9100 capability to display the received J0 trace allows users to verify continuity and correct routing of individual channels within the multi- channel DWDM system.

Figure 2-14: Transmitter J0 Trace dialog box

To edit, click on the Edit J0 Trace button. A dialog box is displayed, as shown in Figure 2-14, reflecting the current settings of the J0 Trace. Click the appropriate radio button to choose between No Trace, 16 Byte Trace, and 64 Byte Trace. To input a Trace Value, click in the Trace Value box and start typing. When edits are complete, click OK to return to the main menu. In 16-byte, the last byte is filled with CRC. In 64-byte, the last two bytes are filled with CR LF.

OTS9100 User Manual 2-33