MC44BC373C/374C Technical Data

Characterization Measurement Conditions

12 Characterization Measurement Conditions

Device default configuration unless otherwise specified:

•

Peak White Clip enable

•

UHF oscillator ON

•

Sound and video modulators ON

•

Sound subcarrier frequency = 5.5Mhz

•

TB1 bit set to ‘0’ (bus format not compatible with MC44353)

•

Sound Oscillator ON

•

Logic Output Port LOW

•

Picture-to-sound carrier ratio = 12dB

•

System L disabled

•

Test pattern disabled

•

All test mode bits are ‘0’

•

Frequency from channel 21 to 69

RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation. Video Input 1V pk-pk.

Audio pre-emphasis circuit engaged.

Device and Signals Set-up

Measurement Set-up

TVOUT output level

Video: 10 steps grey scale

No audio

Measured picture carrier in dBuV with the HP8596E Spectrum Analyzer

using a 75 to 50 ohm transformation, all cables losses and

transformation pads having been calibrated.

Measurement used as a reference for other tests: TVout_Ref

TVOUT output attenuation

“ATT” bit = 1

No Video signal

No Audio signal

Measure in dBc picture carrier at “ATT”=”1” with reference to picture

carrier at “ATT”=”0”.

Sound Subcarrier Harmonics

Video: 10 steps grey scale

No Audio signal

Measure in dBc second and third sound harmonics levels in reference to

picture carrier (TVout_Ref).

Picture carrier

Sound carrier

Sound

+5.5Mhz

Fo

+11Mhz +16.5Mhz

2nd harm

Sound

3rd harm

Freescale Semiconductor, Inc.

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