VeEX MPA User Manual page 120

MPA_e_manual_D07-00-129P_RevA00
TX Clock Loss
Threshold
Measured TX Line
Frequency
Measured TX Line
Frequency Offset
MLD Transmit - Error Alarm
The test unit can transmit errors and alarms to simulate various defects and anomalies
to determine if the receiving equipment can detect an error or alarm in the incoming
signal. Use this screen to configure and transmit Errors and Alarms on all Lanes.
The following table is a quick reference list of the Error and Alarm options available:
Configures the user-definable threshold for the TX Clock
Loss alarm, in PPM.
When the Measured TX Line Frequency Offset exceeds the
TX Clock Loss Threshold, then the TX Clock Loss alarm
begins to accumulate.
Valid range is from 0 to 300ppm, where 0 is disabled. The
default value is 50ppm.
This threshold alarm is only supported when the
Reference is configured for Recovered.
This setting and the associated alarm are disabled when
the TX Clock Reference is set to Internal or
The measured TX line frequency for the currently configured
interface (based on the selected reference clock) is
displayed.
When the TX Clock Reference setting is set to Recovered,
this measurement is derived from the external recovered
clock.
Measures the Transmission Line Frequency Offset value in
Hz and PPM.
When the Clock Reference setting is set to Recovered,
this measurement indicates the deviation between the
system's Chassis clock and the Measured TX Line
Frequency.
MLD Tab
TX Clock
Chassis clock.
120