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Mean Time Between Failures (MTBF)

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

Network Time Server

(25C Ambient / Ground Benign)

Model Options Hours Years
Sonoma D12*听 None 269,000 31
Sonoma D12*听 OCXO 235,000 27
Sonoma D12*听 Rubidium 138,000 16
GPS Antenna n/a 163,000 18

* 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听 OCXO 235,000 27
GPS Antenna n/a 163,000 18

Precision TimeBase听

(25C Ambient / Ground Benign)

Model Options Hours Years
Meridian II* None 265,000 30
Meridian II* OCXO & four 10 MHz 227,000 26
GPS Antenna n/a 163,000 18

* 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

Ninja Time Server / Ninja Precision Timing Module

(25C Ambient / Ground Benign)

Model Options Hours Years
All Ninja models All options 1,194,000 136
External AC/DC Power Supply n/a 710,000 81
GPS Antenna n/a 163,000 18