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MC44BS373CADR2 数据表(PDF) 19 Page - Freescale Semiconductor, Inc

部件名 MC44BS373CADR2
功能描述  PLL-Tuned UHF and VHF Audio/Video High-Integration Modulator
PDF  52 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MC44BS373CADR2 数据表(HTML) 19 Page - Freescale Semiconductor, Inc

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MC44BS373CA Data Sheet
Characterization Measurement Conditions
Picture Carrier Harmonics
No video signal
No audio signal
Measure in dBc, in reference to picture carrier (TVout_Ref), second and
third harmonic of channel frequency, resulting in the following spectrum
.
Out-of-Band Spurious
No video signal
No audio signal
Measure in dB
µV spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel
frequency, resulting in the following spectrum (measure from 40 MHz 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 starting from ±100 kHz from the picture
carrier up to ±5MHz.
Video Bandwidth
No audio
Video: 600-mVp-p 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 100-kHz signal is measured as a reference. The frequency is
then swept from 100 kHz to 5 MHz, and then the difference in dB from the
100-kHz reference level is measured.
Weighted Video Signal to Noise
Video: 100% white video signal, 1 Vp-p.
No audio signal
This is measured using a Rohde & Schwarz
AMFS UHF demodulator in B/G (using a
CCIR Rec. 567 weighting network),
100-kHz to 5-MHz 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 (700 mV) and the noise level in Vrms on a
video black level which is shown below.
Video S/N is calculated as 20 x log(700/N) in dB.
Table 24. Measurement Conditions (continued)
Device and Signal Set-Up
Measurement Set-Up
Picture carrier
3rd harmonic
3Fo
Fo
2Fo
2nd harmonic
Picture carrier
Fo
× 3/2
Fo/2
Fo/4
Fo
×3/4
Fo
Spurious
N
noise level in Vrms



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