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Appendix A
Specifications
Jitter and Wander specifications
T-BERD/MTS/SC Getting Started Guide
Page 230
22046537, Rev. 016
March 2018
Measurement filters
Measurement filters are defined per
ITU-T Recommendation O.172 (04/2005)
.
Memory requirements
describes the memory requirements (storage requirements) for the base unit
when measuring wander.
The maximum wander measurement time is only limited by the available hard disk
space. However, you can only perform wander analysis (MTIE/TDEV) for the first 8.64
million samples of the measurement.
Interface specifications (Jitter and Wander applications)
describes the specifications for the optical connectors when running jitter and
wander applications. The interfaces meet the specifications stated in
ITU-T Recom-
mendation G.957/GR-253
.
Table 151
Memory requirements for wander measurements
Sample rate
Required flash/hard disk space
1/second
approximately 150 KB/hour
30/second
approximately 5 MB/hour
60/second
approximately 9.0 MB/hour
1000/second
1
1. Supported on MSAM only.
approximately 150 MB/hour
Table 152
Optical interface specifications (Jitter and Wander applications)
Item
Description
Optical connector types
1
FC, SC, ST, or LC
Wavelength
1310 and 1550 nm
Line rates
– 155 Mbps
– 622 Mbps
– 2488 Mbps
– 2666 Mbps
Line code
Scrambled NRZ
Transmitter specifications
Transmit level
-2 to +3 dBm
Fiber mode compatibility
1310 and 1550 nm — singlemode fiber
Frequency offset
+50 ppm from the nominal rate,
in 1 ppm steps
Frequency accuracy
+1,5 ppm +1 ppm per year aging
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