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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 |
| 文件頁數(shù)： | 15/30頁 |
| 文件大?。?/td> | 915K |
| 代理商： | MC44BC374C |
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MOTOROLA
MC44BC373C/374C Technical Data
For More Information On This Product,
Go to: www.freescale.com
15
Video Differential Gain
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 shown below, the video analyzer DG measure
consists of calculating the difference of the Chroma amplitude at the
black level and the different amplitudes 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.
Video Modulation Depth
No Audio signal
Video: 10 step grey scale
This is measured using a HP8596E Spectrum Analyzer with a TV
Trigger option, allowing demodulation and triggering on any specified TV
Line. The analyzer is centred on the maximum peak of the Video signal
and reduced to zero Hertz span in Linear mode to demodulate the Video
carrier.
The Modulation Depth is calculated as (A-B)/A x 100 in%
Same measurement method for L standard, with inverted video.
Picture to Sound ratio
No Video signal
No Audio Signal
“PS” bit set to 0 and 1
Measure in dBc sound carrier in reference to picture carrier (TVout_Ref)
for “PS” bit=0 (PS=12dB typical) and for “PS” bit=1 (PS=16dB),
Picture carrier
Audio Modulation Depth - FM Modulation
Video Black Level
Audio signal: 1Khz, 205mVrms.
This is measured using a Rohde &
Schwarz AMFS Demodulator in B/G and a
HP8903A Audio Analyzer at 1kHz
The audio signal 205mV at 1kHz is supplied by the Audio Analyzer, and
the FM demodulated signal deviation is indicated on the Demodulator in
Khz peak.
This value is then converted in% of FM deviation, based on specified
standards.
Device and Signals Set-up
Measurement Set-up
0
1
2
3
4
5
5-step Greyscale with Chroma subcarrier superimposed
(not to scale), line CCIR 330.
DIFF GAIN
=
*
100%
the amplitude at position 0
the largest positive or negative difference
A(mV)
B(mV)
TV Line Demodulated by Spectrum Analyzer-BG standard
Sound carrier
+5.5Mhz
Fo
F
Freescale Semiconductor, Inc.
n
.
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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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