Input Port Status Summary


The Input Port Status Summary screen provides a view of the PRS port and Input port settings. The TimeHub can have a PRS port and four Input ports, or as an option, you can install a Clock card with four additional DS1 inputs for a total of nine inputs. Inputs 5 through 8 can be monitored for performance, but none can be selected as the active input timing reference that drives the outputs. Port settings are described in the following table.

Also see System Settings for a description of the system settings information.

Click Refresh to update the display.

Item

Description

State

Indicates if the port is enabled or disabled as an input timing reference. Inputs 5 through 8 cannot be activated, they are only available for monitoring.

Expected State

Indicates if the port's expected state as an input timing reference is enabled or disabled. Inputs 5 through 8 cannot be activated, they are only available for monitoring.

Status

Displays one of the following port status indications:

  • ACTIVE

  • QUALIFIED

  • NOT QUALIFIED

  • INPUT LOS

  • IMPAIRMENT

  • DISABLED

Priority

Displays the priority setting (0 through 9). The priority setting provides a way to prefer a particular input for use as the active timing reference when more than one input has been qualified. The lower the number, the higher the priority. The default is that the PRS input has highest priority and all others are equal.

Frame Type

Displays the PRS reference frequency and the DS1 input frame type.

Read SSM

Indicates if the input is enabled or disabled to use SSM messages as part of the input qualification process.

Current SSM

Displays the ports current SSM.

Monitor

Indicates if port monitoring is enabled or disabled.

Note: Port monitoring can be enabled even if the port is not enabled as a timing reference.

Bridged Input

Indicates if the reference signal on this port is bridged.

Note: If a reference signal is bridged, it will be nominally 20 dB lower in amplitude than a signal that is terminated at the input.

Refresh Button

Click to update the display