mc44bc373c Freescale Semiconductor, Inc, mc44bc373c Datasheet - Page 14

• Manufacturer Part Number: mc44bc373c
• Description: Pll Tuned Uhf And Vhf Audio/video High Integration Modulator
• Manufacturer: Freescale Semiconductor, Inc

Characterization Measurement Conditions
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.
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,
MC44BC373C/374C Technical Data
Unweighted Video Signal to Noise
Weighted Video Signal to Noise
Go to: www.freescale.com
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.
Same as above.
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.
VideoS/N is calculated as 20 x log(700 /N) in dB
Video Differential Phase
Out of Band Spurious
In Band Spurious
Video Bandwidth
DIFF PHASE =
Peak White Clip
Spurious
Fo/4
the largest positive or negative difference
Measurement Set-up
Fo/2
Picture carrier
noise level in Vrms
.
the phase at position 0
Fo*3/4
N
Fo
Fo*3/2
* 100%