METHODS OF MEASUREMENT FOR EQUIPMENT USED IN TERRESTRIAL RADIO-RELAY SYSTEMS - MEASUREMENTS FOR SUB-SYSTEMS. SECTION 6 - DIVERSITY, TWIN-PATH AND HOT STAND-BY EQUIPMENT
International Electrotechnical Committee
FOREWORD
PREFACE
SECTION SIX - DIVERSITY, TWIN-PATH AND HOT STAND-BY EQUIPMENT
Clause
1 Scope
2 Introduction
2.1 Diversity systems
2.2 Twin-path and hot stand-by systems
3 Switching diversity, twin-path and hot stand-by equipment
3.1 General considerations
3.2 Switching due to pilot level changes
3.3 Switching due to i.f. or r.f. level changes
3.4 Switching due to noise level changes
3.5 Switching due to a.g.c. level changes
3.6 Transmission characteristics of the switch - Isolation
between ports - Transfer time - Switching transients
4 Combining diversity equipment
4.1 General considerations
4.2 S/N ratio function
4.3 I.F. output level function (for i.f. or r.f. combiners only)
4.4 I.F. transient response (for i.f. or r.f. combiners only)
4.5 Transmission characteristics (for i.f. or r.f. combiners only)
FIGURES
Deals with measurements on diversity equipment used for making two or more receivers at a radio relay station suitable for diversity reception. Diversity equipment is assumed to comprise the circuit for switching and/or combining the diversity channels, excluding the diversity channel equipment itself i.e. transmitters, receivers, modulators, demodulators, etc., although these may also be involved in the measurements. Measurements on twin-path and hot stand-by equipment which are not treated in Part 2, Section Two of the publication are also considered in this section. However, measurements related to the properties of the switch and of the switching process, which are applicable equally to stand-by channel switching equipment and to diversity, twin-path and hot stand-by equipment will be covered .
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | SC 12E |
