RF Term
Mttr
Mttr is a concept in RF and microwave engineering. This term is commonly encountered in the design, analysis, and testing of radio frequency systems and components. A comprehensive technical definition with formulas, comparison tables, and FAQs will be added in a future update.
Key Equations
Mean Time To Repair:
MTTR = Σ(repair timei)/N
Availability:
A = MTBF/(MTBF+MTTR)
Downtime per year:
D = 8760×(1−A) hours
Target:
Telecom (99.999%): MTTR < 5.3 min/yr
Industrial (99.9%): MTTR < 8.8 hr/yr
MTTR = Σ(repair timei)/N
Availability:
A = MTBF/(MTBF+MTTR)
Downtime per year:
D = 8760×(1−A) hours
Target:
Telecom (99.999%): MTTR < 5.3 min/yr
Industrial (99.9%): MTTR < 8.8 hr/yr
Comparison
| Availability | MTTR (if MTBF=100kh) | Downtime/year | Application | Notes |
|---|---|---|---|---|
| 99% | 1010 hr | 87.6 hr | Basic | Low requirement |
| 99.9% | 100 hr | 8.76 hr | Industrial | Standard |
| 99.99% | 10 hr | 52.6 min | Telecom | High availability |
| 99.999% | 1 hr | 5.26 min | Critical telecom | Five nines |
| 99.9999% | 0.1 hr | 31.5 s | Mission-critical | Six nines |
Overview
Mttr plays a role in modern RF and microwave system design. Understanding this concept is important for engineers working with radio frequency circuits, antennas, signal processing, and electromagnetic compatibility. This page will be expanded with detailed technical content, engineering equations, comparative reference tables, and frequently asked questions.
See Also