MC44BS374CAEF Freescale Semiconductor, MC44BS374CAEF Datasheet - Page 18

• Manufacturer Part Number: MC44BS374CAEF
• Description: IC AUDIO/VIDEO MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS374CAEF

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Characterization Measurement Conditions
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.
No Audio signal
Video: 10 step grey scale
No Video signal
No Audio Signal
PS” bit set to 0 and 1
Device and Signals Set-up
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 6. Measurement Conditions
MC44BS374CA Technical data
Go to: www.freescale.com
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.
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%
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),
Video Modulation Depth
Video Differential Gain
Picture to Sound ratio
DIFF GAIN
TV Line Demodulated by Spectrum Analyzer-BG standard
5-step Greyscale with Chroma subcarrier superimposed
=
the largest positive or negative difference
Picture carrier
Measurement Set-up
Fo
the amplitude at position 0
+5.5Mhz
(not to scale), line CCIR 330.
0
Sound carrier
1
2
3
A(mV)
B(mV)
B (0.6 - 3mV)
4
A ( 6-10mV)
5
*
100%