| 15 Test and measurement |
| 15.7 Optical and acoustical parameters |
| 15.7.1 Optical spectrum analyzers |
| 15.7.2 Optical time domaine reflectometers |
| 15.7.3 Optical power meters |
| 15.7.5 Optical attenuators |
| 15.7.9 Optical multimeters |
| 15.9 Electrical parameters |
| 15.9.1 Analog measurement techniques |
| 15.9.1.6 General-purpose measurement equipment |
| 15.9.1.6.1 Voltmeters |
| 15.9.1.6.3 Power meters |
| 15.9.1.6.5 Signal generators |
| 15.9.1.6.9 Oscilloscopes |
| 15.9.4 Mobile radio measurement equipment |
| 15.9.4.2 Test systems for digital mobile radios |
| 15.9.4.3 Signal generators for digital mobile radio transmission |
| 15.9.4.4 Analyzers for digital mobile radio transmission |