Optical Systems Design OSD2524, User Manual

Page: 174 / 402

OPTICAL SYSTEMS DESIGN
DOC ID: 10120001
OSD2524 OPERATOR MANUAL
PAGE 174
Manual To Selected: Same as Manual mode where the pt. selected clock source will become Source.
Auto NonRevertive: Clock Selection of the best clock source is only done when the selected clock fails.
Auto Revertive: Clock Selection of the best clock source is constantly done.
Force Hold Over: Clock Selector is forced to Hold Over State.
Force Free Run: Clock Selector is forced to Free Run State.
Source
Only relevant if Manual mode is selected (see above).
WTR Time
WTR is the Wait To Restore timer value in minutes. The WTR time is activated on the falling edge of a
clock source failure (in Revertive mode). This means that the clock source is first available for clock
selection after WTR Time (can be cleared).
SSM Hold Over
This is the transmitted SSM QL value when clock selector is in Hold Over State.
SSM Free Run
This is the transmitted SSM QL value when clock selector is in Free Run State.
EEC Option
The ZL30xxx based Synce modules support both EEC1 and EEC2 option. The difference is: EEC1=>
DPLL bandwidth=3,5 Hz, EEC2=> DPLL bandwidth = 0,1 Hz.
State
This is indicating the state of the clock selector. Possible states are:.
Free Run: There is no external clock sources to lock to (unlocked state). The Clock Selector has never
been locked to a clock source long enough to calculate the hold over frequency offset to local oscillator.
The frequency of this node is the frequency of the local oscillator.
Hold Over: There is no external clock sources to lock to (unlocked state). The Clock Selector has
calculate the holdover frequency offset to local oscillator. The frequency of this node is hold to the
frequency of the clock source previous locked to.
Locked: Clock selector is locked to the clock source indicated (See next).
Top: Clock selector is locked to Time over packets, e.g. PTP (See next).
Clock Source
The clock source locked to when clock selector is in locked state.
LOL
Clock selector has raised the Los Of Lock alarm.
DHOLD
Clock selector has not yet calculated the holdover frequency offset to local oscillator. This becomes
active for about 10 s. when a new clock source is selected