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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
1 To 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 on the
display, choose CLOCK SYNC 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
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.
2 Mb/s
TRANSMIT
PDH/DSn
MAIN SETTINGS
WANDER REF IN
TRANSMIT
SONET
MAIN SETTINGS