IEEE Std 187:2018 pdf download.IEEE Standard for Measurement of Emissions from FM and Television Broadcast Receivers in the Frequency Range of 9 kHz to 40 GHz.
Spurious radiation from sound and television broadcast receivers are possible sources of interference with other radio services.
This standard describes the potential sources of spurious radiation from receivers intended for the reception of sound and television broadcast, and the measurement methods for them.
1.2 General
This standard is divided into three types of testing: conducted emissions (Clause 6), radiated emissions (Clause 7), and antenna radiation (Clause 8). This standard also includes three informative annexes entitled
General TV test requirements, Isolation transformer, and Bibliography.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
ANSI C63.4. American National Standard for Methods of Measurement of Radio-Noise Emission from LowVoltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.
ANSI C63.23, American National Standard Guide for [lectromagnetic Compatibility—Computations and Treatment of Measurement Uncertainty.
CISPR 16-2-3, Specification for radio disturbance and immunity measuring apparatus and methods—Part 2—3: Methods of measurement of disturbances and immunity—Radiated disturbance measurements
CISPR 16-4-2. Specification for radio disturbance and immunity measuring apparatus and methods—Part 4 -2: Uncertainties, statistics and limit modeling— Measurement instrumentation uncertainty.
CISPR 32. Electromagnetic compatibility of multimedia equipment—Emission requirements.
Code of Federal Regulations (CFR) Title 47, Part 15
ITU-R BT.47 1-1(07/86), Nomenclature and description of color bar signals.
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionaiy Online should be consulted for terms not defined in this clause.
frequency modulation (FM) sound broadcast receiver: A device designed to receive FM sound broadcast from a licensed station on frequencies that are authori,ed for commercial or public broadcasting.
4. Sources of spurious emissions
Possible sources of spurious emissions typically found in television (TV) and FM receivers are as follows:
a) The local oscillator circuits. which may radiate fundamental, harmonics, and intermodulation products formed from the local oscillator fundamental harmonics.
b) Intermediate frequency amplifier, which may radiate spurious signals at the fundamental and harmonics of the intermediate frequency.
c) In television receivers, the video amplifier and any nonlinear circuit element that may produce signals by demodulation of radio or intermediate frequency signals.
d) Digital circuits incorporated fora channel display. or processing ofdigital wanted signals, or any other digital control circuit.IEEE Std 187 pdf download.