METHODS OF MEASUREMENT FOR RADIO TRANSMITTERS - AMPLITUDE/FREQUENCY CHARACTERISTICS AND NON LINEARITY DISTORTION IN TRANSMITTERS FOR RADIO TELEPHONY AND SOUND BROADCASTING
International Electrotechnical Committee
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)
244 4A FIRST SUPPLEMENT 1976 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. Publication 244 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).
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | SC 12C |
