VeEX RXT3900, User Manual

Page: 54 / 383

SDH Current:
Indicates the frequency of the input signal.
Offset:
Indicates the difference between the standard rate and the rate of the input signal.
Min (ppm):
Indicates the difference between the standard rate and the minimum deviation detected in the input signal.
Max (ppm):
Indicates the difference between the standard rate and the maximum deviation detected in the input signal.
2M Current (bps):
Indicates the frequency of the payload data. Options 1.5M, 45M, 34M are displayed.
A Min (ppm) and Max (ppm) function can be used to ensure that the received signal is within a certain clock tolerance and that
the network element is transmitting correctly. The frequency limits for the various signal types according to ITU-T
recommendations are presented in the table below.
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 SDH hierarchies
are presented in the table below.
Level:
Measures the Peak and Peak-Peak voltage values or optical power of the incoming signal.
Optical Information (Page 3 & 4)
Page 3 displays the Optical module (SFP or XFP) information which includes Vendor name, Part number, and Optical
Wavelength.
Page 4 displays the Optical module (SFP or XFP) Power Measurement Graph.
Signal - Optical (Page 4)
RXT-3900 e-Manual D07-00-111P Rev A00