2
4. Installation
4.1. Packing List
One device of GTD360
4.2. Power Supply
1) If the local network supports PoE, only one network cable is needed.
2) If not, a power adapter is and a network cable is necessary.
5. Working Status
The working status of NTP analog clock includes localization, standstill, adjustment, normal working, loss of
synchronization.
5.1. Localization
When the clock is powered on, they system will find out the initial position if the three hands( at 12:00) by
rotating as a result from unknowing the current position of the hands.
5.2. Standstill
The hands will pause if the system can’t get the present time from networks due to certain factors, such as
malfunctioned networks, improper configuration after the status of localization and so on.
5.3. Adjustment
The clock system will synchronize itself with the target time by a certain way after obtaining the present time.
The hour and minute hands can adjust themselves by chasing and waiting. It will wait only when the adjusted
target time lags the present time within several minutes. Under other conditions, it will synchronized with the
target time by chasing. However, the seconds hand can only adjusts itself by waiting.
5.4. Normal Working
It refers to the status that hands can run normally within a certain range of time accuracy.
5.5. Loss of Synchronization
The seconds hand will jump two seconds per time if the clock system does not synchronized with the network
for a long time after it steps into the status of normal working.
Notes:
1) Under normal conditions, the analog clock will step into the status of localization immediately as soon as it is
powered on, then it steps into the status of adjustment instantly once it obtains the present time from network,
finally it steps into the status of normal working.
2) On condition that the clock fails to obtain the present time from the network because of malfunctioned
networks or the improper configuration, then it will step into the status of standstill after the localization.
3) If the time zone is modified or the Daylight Saving Time is valid or canceled under the normal working
condition, the clock will step into the status of adjustment. Then it goes to the status of normal working.
4) If the clock fails to obtain time information from the networks for a long time (30 minutes for testing) under
the status of normal working , it will step into the status of loss of synchronization. The clock will step into the
status of normal working after the status of adjustment when it is synchronized again.
