IEC 60244-4:1973

FOREWORD
PREFACE
INTRODUCTION
Clause
1. Object
2. Scope
SECTION ONE - GENERAL CONDITION OF OPERATION AND
              MODULATION INPUT SIGNAL ARRANGEMENTS
3. Introduction
4. General conditions of operation
5. Modulation input signal arrangements
6. Modulation frequencies
SECTION TWO - AMPLITUDE/FREQUENCY CHARACTERISTICS
              AND INTELLIGIBLE CROSSTALK
7. Input impedance
8. Amplitude/modulation frequency characteristic
9. Amplitude/radio-frequency characteristic
10. Crosstalk attenuation in multi-channel transmitters
11. Characteristics particular to stereophonic sounds
    broadcasting (under consideration)
SECTION THREE - NON-LINEARITY DISTORTIONS INCLUDING
                HARMONIC DISTORTION AND INTERMODULATION
                (Under consideration)
APPENDIX A - References to recommendations and reports
             of the C.C.I.R. and to publications of
             other international bodies
APPENDIX B - Table of preferred frequencies in hertz,
             kilohertz or megahertz
APPENDIX C - Networks for providing a given source
             impedance
APPENDIX D - Networks for combining the signals of
             two generators
APPENDIX E - Examples of pre-emphasis characteristics for
             frequency-modulation sound broadcasting in
             band 8 (VHF)

Applies to all transmitters for A3 class of operation. Applies also to radiotelephony transmitters with 1, 2, 3 or 4 channels for A3A, A3B, A3H and A3J class of operation, and to frequency modulated transmitters for monophonic sound broadcasting. Applies in part to transmitters for A7A and A7B class of operation. IEC 60244-4 itself describes standard operating conditions, standard modulation input arrangements and frequencies (Section One). It also describes standard methods to be used for measuring input impedance, the amplitude/frequency characteristics and the intelligible crosstalk (Section Two).