MC44BC374T1 Datasheet, PDF (11/26 Pages) Motorola, Inc – No external varicaps diodes/inductor or tuned components

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
• Sound Oscillator ON
• Picture-to-sound carrier ratio = 12dB
• 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
Video: 10 steps grey scale
No audio
“ATT” bit = 1
No Video signal
No Audio signal
Measurement Set-up
TVOUT output level
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
Measure in dBc picture carrier at “ATT”=”1” with reference to picture
carrier at “ATT”=”0”.
Sound Subcarrier Harmonics
Measure in dBc second and third sound harmonics levels in reference to
picture carrier (TVout_Ref).
Video: 10 steps grey scale
No Audio signal
Picture carrier
Sound carrier
Sound
2nd harm
Sound
3rd harm
Fo +5.5Mhz +11Mhz +16.5Mhz
MOTOROLA
MC44BC374T1 Technical Data
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