Setting The Input Reference Selection Mode; Automatic Reference Switching Controls - Symmetricom TSG-3800 Series User Manual

Setting the Input Reference Selection Mode

The TSG-3800 can choose input references using one of three modes:
Priority – bases the reference selection on the port's provisioned priority.
Secondary criteria is the SSM information.
SSM – bases the reference selection on received or provisioned SSM, then
priority and position.
Best – bases the reference selection on the weight derived from the input
stability calculations. Secondary criteria are the priority and SSM information.
To check the reference mode, type:
REF MODE
A typical response from the TSG-3800 is:
TSG->REF MODE
Unit in Priority Mode
TSG->
To set the Reference Selection Mode to either PRIORITY, SSM, or BEST, use the
following syntax:
REF MODE [PRI|SSM|BEST]

Automatic Reference Switching Controls

Two commands affect automatic reference switching. They are Input AS
(AutoSwitch) and Input AR (AutoReturn). When Input AS is On, the TSG-3800
automatically switches references upon failure of the current reference. The default
is On. When Input AS is Off, then the reference switching is done by manual
command only. The TSG-3800 switches to Holdover if the current reference fails.
When Input AR is On, the TSG-3800 automatically switches to the highest priority
input if it is not currently selected. The default is On. This switch occurs when a valid
higher priority input recovers from a previous failure. Switching occurs even if the
current reference is valid.
Note: Input Autoswitch must be ON for Input Autoreturn to function
properly.
To check the state of Autoswitch, type:
INPUT AS
A typical response from the TSG-3800 is:
12778474-002-2 Revision F – March 2004
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then press Enter
then press Enter
System Administrator's Reference
Provisioning Input Reference Signals
TSG-3800 User's Guide 327