MC44BC374CDTB 데이터 시트보기 (PDF) - Freescale Semiconductor
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MC44BC374CDTB Datasheet PDF : 30 Pages
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Characterization MeasuremFernet eCosncdiatiolens Semiconductor, Inc.
Device and Signals Set-up
No Video signal
No Audio signal
Measurement Set-up
Out of Band Spurious
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.
Picture carrier
Spurious
Fo/4
Fo/2 Fo*3/4 Fo
In Band Spurious
Fo*3/2
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: 10 step grey scale
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. The Video Analyzer measures the ratio between the amplitude of the
No Audio signal
active area of the video signal (700mV) and the noise level in Vrms on a
This is measured using a Rohde &
video black level which is show below.
Schwarz AMFS UHF Demodulator in B/G VideoS/N is calculated as 20 x log(700 /N) in dB
(using a CCIR Rec. 567 weighting
network, 100kHz to 5MHz band with sound
trap and envelope detection, and a Rohde
& Schwarz UAF Video Analyzer.
N
noise level in Vrms
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.
DIFF PHASE =
the largest positive or negative difference
the phase at position 0
* 100%
The video analyzer method takes the worst step from the first 4 steps.
MC44BC373C/374C Technical Data
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