參數(shù)資料
型號(hào)： MC44BC374C
廠商： Motorola, Inc.
英文描述： PLL Tuned UHF and VHF Audio/Video High Integration Modulator
中文描述： 鎖相環(huán)調(diào)諧UHF和VHF音頻/視頻高集成調(diào)制器
文件頁(yè)數(shù)： 14/30頁(yè)
文件大?。?/td> 915K
代理商： MC44BC374C
14
MC44BC373C/374C Technical Data
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
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: 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.
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
F
n
.
相關(guān)PDF資料
PDF描述
MC44BC374CD PLL Tuned UHF and VHF Audio/Video High Integration Modulator
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC44BC374CD 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator
MC44BC374CDR2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator
MC44BC374CDTB 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC44BC374CDTBR2 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC44BC374CED 制造商:Motorola Inc 功能描述:
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