ZTE Corporation ZXG-BTS2 Manuale Utente

Pagina di 139
 
 
Chapter 2 - Technical Indices 
Confidential and Proprietary Information of ZTE CORPORATION 25 
Clock Indices 
It provides a two-level clock, whose indices are as follows:  
Clock accuracy: ±1.0×10
-9
 
Pull in range: ±1.0×10
-9
 
Maximum frequency bias: 1 × 10
-9
/day 
Initial maximum frequency bias: 1×10
-7
 
Reliability Indices 
MTBF (Mean Time Between Failure) (hour): 6.3 ~ 10
4
 hours 
Mean Time To Repairs (MTTR): 0.57 hours 
Availability ratio A (%): 99.9991% 
Annual average interruption time of the system (hour): 0.080 hours 
The product successfully passed the CE certification. The personal safety, 
electromagnetic security, EMC and guarantee of the wireless frequency 
spectrum comply with international standards.