Home>IEEE standards>IEEE 187-2018 pdf free

IEEE 187-2018 pdf free

IEEE 187-2018 pdf free.IEEE Standard for Measurement of Emissions from FM and Television Broadcast Receivers in the Frequency Range of9 kHz to40 GHz.
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary 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 authorized for commercial or public broadcasting.
4. Sources of spurious emissions
Possible sources of spurious emissions typically found in television (TV) and FM reeivers are as fllows:
a) The local oscillator circuits, which may radiate fundamental, harmonics, and intermodulation products formed from the local oscillator fundamental harmonics.
b) Intermediate frequency amplifer, 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 for a channel display, or processing of digital wanted signals, or any other digital control circuit.
5. Modes of spurious emissions
Possible modes of spurious emissions from sources enumerated in Clause 4 are as follows:
a) Spurious radiation signals emanating from any intemal source, such as those described in Clause 4, may appear on the receiver antenna terminal(s) and be radiated from antenna systems attached thereto. Such signals may be balanced or unbalanced relative to ground.
b)Radiation from the sources enumerated in Clause 4 may appear in the vicinity of the enclosure.
c) Radiation from any of the sources may be propagated through the power supply cord and any peripherals that may be attached to the receiver. Such radiation may be due to balanced or unbalanced current in the power cord or connection leads.
6.1 General
Television and FM broadcast receivers are potential sources of interference to other television and FM broadcast receivers, receivers in other services, and other electronic equipment. This clause defines a method for obtaining a measure of the emissions conducted by the power line from those potential interference sources in the frequency range of 150 kHz to 30 MHz. This clause describes standard input signals, the equipment setup, and measurement techniques.
6.2 Equipment requirements and setup details
6.2.1 Test signals
The standard test signal for FM radio receivers is an RF signal modulated with a 1 kHz tone. The digital test signal is an RF signal modulated with a digital data stream containing sound information.
The standard test signal for television receivers is a standard television color bar signal according to ITU-R BT.471-1. The analog input signal shall be a vision crrier modulated by a complete video waveform, including a color burst together with an unmodulated sound carrier of correct relative amplitude and frequency.
The digital television signal shall be an RF signal modulated with a digital data stream containing video and accompanying sound information.
For an analog sound and television receiver, the input level of the test signal at the antenna terminal of the equipment under test (hereafter referred to as the EUT) shall be sufficiently strong to provide a noise-free picture.IEEE 187 pdf download.

Related PowerPoint Templates

Template Categories