VeEX RXT-6000e, User Manual

Page: 67 / 387

Signal - Frequency (Page 2)
Frequency:
The received signal frequency and offset is measured and displayed.
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: 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.
Signal > Optical Information (Page 3)
Page 3 displays the Optical module information which includes Vendor name, Part number, and Optical Wavelength.
RXT-6200_RXT6000e_Module_Manual Page 67 of 387