Mean Time Between Failures (MTBF)

Mean Time Between Failures (MTBF) is a common way of measuring the reliability of a product.  We calculate MTBF based on Telcordia SR-332, Issue 3.

 

Network Time Server

(25C Ambient / Ground Benign)

Model Options Hours Years
Sonoma D12* (GPS / CDMA) None 269,000 31
Sonoma D12* (GPS / CDMA) OCXO 235,000 27
Sonoma D12* (GPS / CDMA) Rubidium 138,000 16

* MTBF for Sonoma N12 without a front-panel display is even better.

 

 

PTP Grandmaster

(25C Ambient / Ground Benign)

Model Options Hours Years
Sonoma D12 OCXO 235,000 27
Sonoma D12 Rubidium 138,000 16
Meridian II  OCXO 235,000 27

 

 

Precision TimeBase 

(25C Ambient / Ground Benign)

Model Options Hours Years
Meridian II* None 265,000 30
Meridian II* OCXO & four 10 MHz 227,000 26

* MTBF for Tycho II without a front-panel display is even better.

 

 

Distribution Chassis (e-Series)

(25C Ambient / Ground Benign)

Model Options Hours Years
All models None 263,491 30
All models Dual AC/AC 197,660 23