參數(shù)資料
型號(hào): MC44BC375UADEVK
廠商: Freescale Semiconductor
文件頁(yè)數(shù): 15/16頁(yè)
文件大?。?/td> 0K
描述: KIT KIT FOR BC375UA AUD/VID MOD
標(biāo)準(zhǔn)包裝: 1
類(lèi)型: *
適用于相關(guān)產(chǎn)品: *
所含物品: *
Application Specific Products
8
Freescale Semiconductor
MC44BC375U
CHARACTERIZATION MEASUREMENT CONDITIONS
Device default configuration unless otherwise specified:
Sound subcarrier frequency = 5.5 MHz
Picture-to-sound carrier ratio = 14 dB
CH3 and CH4 frequencies
RF Inputs / Output into 75
Load using a 75 to 50
transformation
Video Input 1.0 V pk-pk
Audio pre-emphasis circuit engaged
Table 9. Performance Measurement Test Set-Ups
Device and Signals Set-Up
Measurement Set-Up
RFOUT Output Level
Video: 10 steps grey scale
No audio
Measured picture carrier in dB
V with the HP8596E Spectrum Analyzer using a
75 to 50
transformation, all cables losses and transformation pads having been
calibrated.
Measurement is used as a reference for other tests: RFout_Ref
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 (RFout_Ref).
Second Harmonics of Chroma Subcarrier
No audio
Video: a 700 mV(pp) 100 kHz sinusoidal
signal is inserted on the black level of active
video area.
Measure in dBc, in reference to picture carrier (RFout_Ref), second harmonic of
chroma at channel frequency plus 2 times chroma frequency, resulting in the
following spectrum.
Picture carrier
Sound carrier
Sound
+5.5 MHz
Fo
+11 MHz +16.5 MHz
2nd harm
Sound
3rd harm
700mV pk-pk
Frequency
100kHz
Frequency
100 kHz
700 mVpkpk
Picture carrier
Sound
Chroma 2nd
+8.86 MHz
Fo
+4.43 MHz +5.5 MHz
Harmonic
carrier
Chroma
carrier
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