MC44CC374T1AEF Freescale Semiconductor, MC44CC374T1AEF Datasheet - Page 21

• Manufacturer Part Number: MC44CC374T1AEF
• Description: Modulator / Demodulator CMOS MOD R3.0 374T1A
• Manufacturer: Freescale Semiconductor

Specifications of MC44CC374T1AEF

• Package / Case: SOIC-16
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Freescale Semiconductor
Table 22. Performance Measurement Test Set-ups (continued)
Video: 5 step Grey Scale- 1 V
No Audio signal
This is measured using a 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 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
(PP)
.
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 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 %
Same measurement method for L standard, with inverted video.
Measure in dBc sound carrier in reference to picture carrier (RFout_Ref) for PS
bit = 0 (PS = 12 dB 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, line CCIR330
the largest positive or negative difference
Picture carrier
Measurement Set-up
Fo
the amplitude at position 0
+5.5Mhz
Sound carrier
0 1 2 3
4
5
A (mV)
B (mV)
* 100%
MC44CC373
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