MC44BC374T1D FREESCALE [Freescale Semiconductor, Inc], MC44BC374T1D Datasheet - Page 13

• Manufacturer Part Number: MC44BC374T1D
• Description: PLL Tuned PAL/NTSC UHF and VHF Audio/Video High Integration Modulator IC
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

No Video signal
No Audio signal
No Video signal
No Audio signal
No audio
Video: 600mVpk-pk sinusoidal signal
inserted on the black level of active video
area.
No Audio signal.
Video: 10 step grey scale
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.
Same as above with CCIR filter disabled. Same as above.
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.
Device and Signals Set-up
Freescale Semiconductor, Inc.
For More Information On This Product,
Unweighted Video Signal to Noise
MC44BC374T1 Technical Data
Weighted Video Signal to Noise
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
Measure in dBc, in reference to picture carrier (TVout_Ref), spurious
levels falling into video bandwidth Fo+/-5Mhz.
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.
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.
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.
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.
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VideoS/N is calculated as 20 x log(700 /N) in dB
Video Differential Phase
Out of Band Spurious
DIFF PHASE =
In Band Spurious
Video Bandwidth
Peak White Clip
Spurious
Fo/4
the largest positive or negative difference
Characterization Measurement Conditions
Measurement Set-up
Fo/2
Picture carrier
noise level in Vrms
.
the phaseat position 0
Fo*3/4
N
Fo
Fo*3/2
* 100%