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MC44BC374T1 Datasheet(PDF) 13 Page - Freescale Semiconductor, Inc

Part No. MC44BC374T1
Description  PLL Tuned PAL/NTSC UHF and VHF Audio/Video High Integration Modulator IC
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC44BC374T1 Datasheet(HTML) 13 Page - Freescale Semiconductor, Inc

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Characterization Measurement Conditions
MC44BC374T1 Technical Data
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 phaseat 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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