MC44BC374T1D FREESCALE [Freescale Semiconductor, Inc], MC44BC374T1D Datasheet - Page 11

• Manufacturer Part Number: MC44BC374T1D
• Description: PLL Tuned PAL/NTSC UHF and VHF Audio/Video High Integration Modulator IC
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

12 Characterization Measurement Conditions
Device default configuration unless otherwise specified:
RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation. Video Input 1V pk-pk. Audio
pre-emphasis circuit engaged.
Video: 10 steps grey scale
No audio
“ATT” bit = 1
No Video signal
No Audio signal
Video: 10 steps grey scale
No Audio signal
•
•
•
•
•
•
•
•
•
Device and Signals Set-up
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
Freescale Semiconductor, Inc.
For More Information On This Product,
MC44BC374T1 Technical Data
Sound Subcarrier Harmonics
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
Measure in dBc picture carrier at “ATT”=”1” with reference to picture
carrier at “ATT”=”0”.
Measure in dBc second and third sound harmonics levels in reference to
picture carrier (TVout_Ref).
Go to: www.freescale.com
TVOUT output attenuation
TVOUT output level
Picture carrier
Fo
Characterization Measurement Conditions
Sound carrier
Measurement Set-up
+5.5Mhz
Sound
2nd harm
+11Mhz +16.5Mhz
Sound
3rd harm