Symmetricom Time Server Manual Do Utilizador

Chapter 1: General Information

The power input specifications of TimeVault are:

The timing accuracy achievable with this product depends on several factors.  The most 
important is the method TimeVault employs to use the NTP information.  It is widely 
accepted that the uncertainty of any single NTP packet is on the order of 10 ms.  However, 
most NTP client programs perform averaging and filtering over several NTP transfers, 
improving the accuracy and removing the systematic delays.  The performance of the 
various NTP clients varies widely, but some are able to achieve accuracies below 1 ms.

Inherent accuracy:

• With GPS synchronization, approximately 125

 

µ

s (this accuracy exceeds that which 

the NTP protocol delivers over a network)  

• With ACTS synchronization,  5 ms. 

 In this case, the system accuracy is limited to the accuracy of the ACTS input.

• With NTP client mode synchronization, the accuracy of the client software is the 

limiting factor in determining the delivered time accuracy.

• Accuracy of packet delivery time to network jack: <0.5 ms

During a synchronization input outage, following initial synchronization of TimeVault to 
its input synchronization sources, the time maintained in the unit diverges from the input 
at the rate of approximately 6 parts in 10

-6

, if the ambient temperature is maintained 

within ± 3 °C.

AC Mains:
(base model)

100 to 240 VAC, 47-440 Hz
IEC 320 Connector

–48 VDC
(optional):

–36 to –60 VDC
4 position Barrier Strip Connection
Fuse: 1A Slow-Blow (rear panel)

Power Requirement:

<20 W maximum

FCC

CE (applies to base model only)

UL (applies to base model only)