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Appendix A Specifications
Jitter and Wander specifications
T-BERD/MTS/SC Getting Started Guide
March 2018 22046537, Rev. 016 Page 237
Error limits
The error limits conform to the requirements of ITU-T Recommendations O.172 (04/
2005) and O.173 (03/2003) .
Synchronization
When generating wander, the Dual Module Carrier, Transport Module, and MSAM must
be synchronized to an external timing source. For more details, see “Reference clock”
on page 229.
Wander measurement
This section provides specifications when measuring wander on an optical circuit.
Reference clock
See to “Reference clock” on page 229 for reference clock requirements.
TIE measurement
Per ITU-T Recommendation O.172 (04/2005) and O.173 (03/2003) , TIE can be inter-
preted as the time difference between the signal you are measuring and the reference
clock. This measurement is used to calculate other results, such as MTIE and TDEV.
To ensure accuracy of the TIE measurement, warm-up the Dual Module Carrier,
Transport Module, and MSAM for at least 30 minutes and ensure there is no change in
ambient temperature exceeding 5
°
Celsius.
Frequency range 10
μ
Hz to 10 Hz
Amplitude range at 2.5/2.7G 0.1 UI to 100000UI
Modulation frequency accu-
racy ± 0.1%
Table 163 Internal modulation source specifications (Continued)
Item Description
Table 164 Wander clock frequency specifications
Item Description
Permissible offset + 20 ppm
Wander transfer bandwidth approximately 1 Hz