Making Measurements
Measuring Wander
Measuring Wander
Description: Accurate Wander measurements require a Wander reference derived from the SONET Clock module. Wander results are displayed in UI and nanoseconds and Jitter Amplitude and Jitter Hits results are available.
When wander is measured at 2 Mb/s, Estimated Bit and Frame slips are calculated and a Bar Graph shows the cumulative Wander over the measurement period.
HOW TO: Make the Measurement
1To obtain the Wander reference from the DSn transmitter connect REF OUT on the SONET Clock module to REF IN on the DSn Jitter
TX module. Choose SIGNAL 2 Mb/s on the 
display, choose CLOCK SYNC WANDER REF IN and
choose the SOURCE required from the menu. See “Setting DSn Transmit Interface” page 2.
2 | To obtain the Wander reference from the SONET transmitter choose | |
| the required reference from the CLOCK menu on the TRANSMIT | SONET |
| MAIN SETTINGS display. See, “Setting SONET Transmit Interface” page 4. | |
3 | If measuring wander at a DSn rate set up the DSn receive interface. | |
| See, “Setting DSn Receive Interface” page 15. |
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