Event Log
19.1.4 Signal
The Signal tab brings up the Frequency and Level result screen.
Signal
Frequency:
The received signal frequency and offset is measured and displayed. For E1 signals, the measurement is performed
on both balanced 120ohm and unbalanced 75ohm interfaces.
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
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.
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