External Clock Output Phase-Locked Source

In this user interface, you can set the 2M phase-locked source.

Navigation Path

In the NE Explorer, select Configuration > Clock > Physical Layer Clock > Phase-Locked Source Output by External Clock from the Function Tree. Click External Clock Output Phase-Locked Source tab.

Parameters

Field	Value	Description
NE Name	For example: NE1	Displays the NE name.
NE Synchronous Clock Output<2M Phase-Locked Source>	Default: Internal Clock Source	Sets the 2M phase-locked source output of the clock. You can select Internal Clock Source or External Clock Source. In general, select Internal Clock Source. The 2M phase-locked source is used to relay and amplify the clock source, so that the clock signal with some frequency deviation and wander is optimized with the help of other local synchronization sources. In this case, set the clock level and select another clock source such as the Line Clock Source as the 2M phase-locked source.
External Clock Output Mode When 2M Output Synchronous Source Is Invalid	Synchronization Quality Unavailable, Output AIS, Shut off Default: Shut off	Sets the action the system will perform when NE synchronization clock output (that is 2M phase-locked source) fails.
Output Impedance of External Clock Source 1	75 ohm, 120 ohm Default: 75 ohm	The NE can provide two external output clocks, and the output matching impedance of external output clock 1 is set here.
Output Impedance of External Clock Source 2	75 ohm, 120 ohm Default: 75 ohm	The NE can provide two external output clocks, and the output matching impedance of external output clock 2 is set here.
Output Mode of External Clock Source 1	2M Bit/s, 2M Hz Default: 2M Bit/s	The NE can provide two external output clocks, and the output mode of external output clock 1 is set here.
Output Mode of External Clock Source 2	2M Bit/s, 2M Hz Default: 2M Bit/s	The NE can provide two external output clocks, and the output mode of external output clock 2 is set here.
Clock Source Threshold	No Threshold Value, G.813 SDH Equipment Timing Source (SETS) Signal, G.812 Lock Clock Signal, G.812 Transit Clock Signal, G.811 Clock Signal	Sets the synchronous source threshold for the 2M synchronous output source. The clock protection function of the synchronous source threshold used for S1 byte. The NE clock system judges the quality of clock output according to this value, and the external clock will not output until the clock quality is beyond the threshold.