MC44BC373C datasheet(15/30 Pages) FREESCALE

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Characterization Measurement Conditions

MC44BC373C/374C Technical Data

Video Differential Gain

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.

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.

Video Modulation Depth

No Audio signal

Video: 10stepgreyscale

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%

Same measurement method for L standard, with inverted video.

Picture to Sound ratio

No Video signal

No Audio Signal

“PS” bit set to 0 and 1

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),

Audio Modulation Depth - FM Modulation

Video Black Level

Audio signal: 1Khz, 205mVrms.

This is measured using a Rohde &

Schwarz AMFS Demodulator in B/G and a

HP8903A Audio Analyzer at 1kHz

The audio signal 205mV at 1kHz is supplied by the Audio Analyzer, and

the FM demodulated signal deviation is indicated on the Demodulator in

Khz peak.

This value is then converted in% of FM deviation, based on specified

standards.

Device and Signals Set-up

Measurement Set-up

5-step Greyscale with Chroma subcarrier superimposed

(not to scale), line CCIR 330.

DIFF GAIN

=* 100%

the amplitude at position 0

the largest positive or negative difference

A ( 6-10mV)

B (0.6 - 3mV)

TV Line Demodulated by Spectrum Analyzer-BG standard

A(mV)

B(mV)

Picture carrier

Sound carrier

+5.5Mhz

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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