Low quality clock sources that deviate from the nominal value cause problems in the operation of network elements. It is
necessary and recommended to measure the signal frequency at all hierarchies to reduce synchronization risks. To measure line
frequency in service, the test set must be connected to a Protected Monitoring Point (PMP). The frequency of the signal is
normally reported in Hz, while the deviation is reported in ppm. Tolerances for the various clock frequencies of SONET
hierarchies are presented in the table below
Level:
Measures the Peak and Peak-Peak voltage values of the incoming signal. The levels for STS-3 electrical signal according
to GR.253 recommendations are presented.
Optical Information (Page 3 & 4)
Page 3 displays the Optical module (SFP or XFP) information which includes Vendor name, Part Number and Optical
Wavelength.
Signal - Optical (Page 3)
RXT-3900 e-Manual D07-00-111P Rev A00
Содержание RXT3900
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