IEC 60835-2-4 : 1.1

METHODS OF MEASUREMENT FOR EQUIPMENT USED IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS - PART 2-4: MEASUREMENTS ON TERRESTRIAL RADIO-RELAY SYSTEMS - TRANSMITTER/RECEIVER INCLUDING MODULATOR/DEMODULATOR

International Electrotechnical Committee

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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Transmitter including modulator
      3.1 General
      3.2 Output frequency
      3.3 R.F. output spectrum
      3.4 R.F. output power
      3.5 Phase/amplitude error
             3.5.1 Method of measurement
             3.5.2 Presentation of results
             3.5.3 Details to be specified
4 Receiver including demodulator
      4.1 General
      4.2 Local oscillator frequency
      4.3 R.F. leakage spectrum
      4.4 A.G.C. characteristic
             4.4.1 Definition and general considerations
             4.4.2 Method of measurement
             4.4.3 Presentation of results
             4.4.4 Details to be specified
      4.5 Selectivity
             4.5.1 Definition and general considerations
             4.5.2 Method of measurement
             4.5.3 Presentation of results
             4.5.4 Details to be specified
      4.6 Noise figure
5 Transmit-receive selection
      5.1 General considerations
      5.2 Bit-error-rate (BER)
      5.3 Selective fading signature
             5.3.1 General considerations
             5.3.2 Method of measurement
             5.3.3 Presentation of results
             5.3.4 Details to be specified
      5.4 Timing jitter
      5.5 Group-delay/frequency characteristic
Figure 1 - Examples of signal processors used in digital
           transmitters and receivers
Figure 2 - Arrangement for measuring the selectivity of the
           carrier part of a digital receiver
Figure 3 - Arrangement for measuring the transmission
           performance of a digital transmit/receive section
           under flat-fading conditions
Figure 4 - Example of a bit-error-ratio curve of a digital
           transmit/receive section as a function of receiver
           input level (simulated flat-fading)
Figure 5 - Functional arrangement of the two-way fading
           simulator
Figure 6 - Wideband frequency characteristic of the two-ray
           i.f. fading simulator
Figure 7 - Example of minimum/non-minimum phase signature
Figure 8 - Arrangements for measuring the group-delay/
           frequency characteristic of a digital transmit/
           receive section
Annex A (informative) Bibliography

Abstract

Deals with methods of measurement for transmitters including modulators, and receivers including demodulators, used in digital radio-relay systems. Measurements for adaptive equalizers are given in IEC 835-2-8.