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MC44BS374T1D-R2 数据表(PDF) 18 Page - Freescale Semiconductor, Inc

部件名 MC44BS374T1D-R2
功能描述  PLL Tuned UHF and VHF Audio/Video High Integration Modulator
PDF  34 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MC44BS374T1D-R2 数据表(HTML) 18 Page - Freescale Semiconductor, Inc

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MC44BS374T1/374T1A Advance Information
Characterization Measurement Conditions
Video Bandwidth
No audio
Video: 600mVpp 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 dB from the 100KHz reference level is measured.
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.
Table 7. Measurement Conditions
Device and Signals Set-up
Measurement Set-up
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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