7.2.4 Signal
The Signal tab displays the Level and Frequency screen. Page 1 displays the level measurement in electrical units (volts) for
OC-3, OC-12, OC-48 and OC-192 signals.
Loss of Signal (LOS) and the Saturation level for optical signals are shown graphically including the level measurement in dBm.
Signal (Page 1)
Frequency (Page 2)
The received signal frequency and offset is measured and displayed. For SONET signals, the measurement is performed on both
electrical (BNC) and optical interfaces (SFP or XFP).
Frequency (Page 2)
SONET 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.
45M Current:
Indicates the frequency of the payload data. Options are 1.5M, 2M, 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.
RXT-3900 e-Manual D07-00-111P Rev A00
Summary of Contents for RXT3900
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