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MC44BC373CDR2 数据表(PDF) 14 Page - Freescale Semiconductor, Inc |
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MC44BC373CDR2 数据表(HTML) 14 Page - Freescale Semiconductor, Inc |
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14 / 30 page  MC44BC373C/374C Technical Data Characterization Measurement Conditions Out of Band Spurious No Video signal No Audio signal Measure in dBuV spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel frequency, resulting in the following spectrum Measure from 40Mhz to 1Ghz . In Band Spurious No Video signal No Audio signal Measure in dBc, in reference to picture carrier (TVout_Ref), spurious levels falling into video bandwidth Fo+/-5Mhz. Video Bandwidth No audio Video: 600mVpk-pk sinusoidal signal inserted on the black level of active video area. The Video signal is demodulated on the spectrum analyzer, and the peak level of the 100Khz signal is measured as a reference. The frequency is then swept from 100Khz to 5Mhz, and then the difference in dBc from the 100Khz reference level is measured. Peak White Clip No Audio signal. Video: 10stepgreyscale The video modulation depth is measured for 1.0VCVBS input level, giving modulation depth MDA. Then the same measurement is carried out for an input level of 1.4VCVBC, giving modulation depth MDB. The Peak White Clip is defined as 100*MDB/MDA. Weighted Video Signal to Noise Video: 100% White video signal - 1Vpk-pk. No Audio signal This is measured using a Rohde & Schwarz AMFS UHF Demodulator in B/G (using a CCIR Rec. 567 weighting network, 100kHz to 5MHz band with sound trap and envelope detection, and a Rohde & Schwarz UAF Video Analyzer. The Video Analyzer measures the ratio between the amplitude of the active area of the video signal (700mV) and the noise level in Vrms on a video black level which is show below. VideoS/N is calculated as 20 x log(700 /N) in dB Unweighted Video Signal to Noise Same as above with CCIR filter disabled. Same as above. Video Differential Phase Video: 5 step Grey Scale- 1Vpk-pk. No Audio signal This is measured using a Rohde & Schwarz AMFS UHF Demodulator in B/G (using a CCIR Rec. 567 weighting network, 100kHz to 5MHz band with sound trap, and envelope detection, and a Rohde & Schwarz UAF Video Analyzer. On line CCIR 330, the video analyzer DP measure consists of calculating the difference of the Chroma phase at the black level and the different chroma subcarrier phase angles at each step of the greyscale. The largest positive or negative difference indicates the distortion. The video analyzer method takes the worst step from the first 4 steps. Device and Signals Set-up Measurement Set-up Picture carrier Fo*3/2 Fo/2 Fo/4 Fo*3/4 Fo Spurious N noise level in Vrms DIFF PHASE = * 100% the phase at position 0 the largest positive or negative difference Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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