IEC 62389-2005 pdf – Methods of measurement for DVD players.
1 Scope This International Standard specifies measurement methods of electrical characteristics for consumer-use DVD players. This standard is applicable for use in the description of performances for catalogues and brochures of the products. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications IEC 61672-2, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests IEC 61606-1, Audio and audiovisual equipment – Digital audio parts – Basic measurement methods of audio characteristics – Part 1: General IEC 61606-2, Audio and audiovisual equipment – Digital audio parts – Basic measurement methods of audio characteristics – Part 2: Consumer use ITU-R BT.471-1, Nomenclature and description of colour bar signals SMPTE EG 1,1990, Alignment colour bar test signal for television picture monitors 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61606-1 and IEC 61606-2, as well as the following, apply. 3.1 video signal composite video signal including synchronization signal 3.2 S video signal video signal separately transferred by Y signal and C signal NOTE The Y signal is composed of the luminance signal and the synchronization signal from the composite video signal and does not include the chrominance signal. The C signal is the modulated chrominance signal. 3.3 component signal set of three kinds of signals, Y signal and two chrominance signals 3.4 V or H synchronized sweep signal video test signals that frequency is swept within a certain frequency range by vertical or horizontal synchronization timing.
3.5 525i expression of the video signal format which has 525 scanning lines in a frame and is interlaced 3.6 video signal level voltage value of the video signal measured from sync tip to white peak 3.7 EUT equipment under test 3.8 horizontal resolution visible limit of horizontal resolution calculated by the horizontal frequency characteristics of the luminance signal and expressed by the number of TV lines 3.9 video signal-to-noise ratio ratio of noise r.m.s. value to reference level of 100 %, 0,714 V r.m.s. in NTSC, 0,7 V r.m.s. in PAL, at the flat area of the luminance signal 3.10 video signal output level peak-to-peak value of the reference video output signal at reference load impedance 3.11 audio output signal level output voltage of playback reference signal 4 Measuring conditions 4.1 Conditions for both audio and video 4.1.1 Power supplies 18.104.22.168 Voltage The a.c. power voltage supplied shall be the fixed value of the region where the device under test (DUT) is used and the supplied d.c. power voltage shall be the fixed value specified by the manufacturer. The tolerance shall be within ±1 % in both cases; the power-supply voltage can be within ±5 % if this tolerance does not affect the results of measurement. 22.214.171.124 Frequency The frequency of the a.c. power supply shall be 50 Hz or 60 Hz and the fluctuation shall be within ±2 %. 126.96.36.199 Waveform distortion 188.8.131.52.1 AC power supply The waveform of the a.c. power supply shall be a sine wave of which the harmonic content is 2 % or less. 184.108.40.206.2 DC power supply The ripple voltage shall be 0,1 % or less.
220.127.116.11 Test signal The V or H synchronized sweep signal, amplitude of 100 % and frequency range of 100 kHz to 6,75 MHz with frequency markers. 18.104.22.168 Measurement a) Set the EUT to the standard settings for the video part described in 4.2. b) Play back the V or H sweep signal of the test disc and read the frequency at which the signal level becomes 1/10 (-20 dB) of the level of 1 MHz by oscilloscope with one decimal unit of MHz. Calculate the horizontal resolution, R h , by the following formula. R h = (3/4) × 2 × (1 – α) × (f 0 × 10 6 /f H ) ≈ 80 × f 0 (TV lines) where f H is the horizontal line frequency (in Hz); α is the blanking duration rate of the horizontal line (0,17); f 0 is the frequency which signal level is becoming to 1/10 (-20 dB ) of the level of 1 MHz (in MHz). NOTE 1 In the case where the level of 6,75 MHz, the end-point of the sweep signal, is greater than 1/10 (-20 dB) of the level of 1 MHz, the horizontal resolution is reported to 540 TV lines. NOTE 2 In the case where the envelope of the sweep signal appears double, the lower level should be read as the measuring value. In the case where the envelope has a ripple, the dip-point level is read as the measuring value.