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MC44BC373CDR2 Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc |
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MC44BC373CDR2 Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc |
11 / 30 page Audio Characteristics MC44BC373C/374C Technical Data 11 Audio Characteristics Unless otherwise stated: Vcc=5.0V, Ambient Temperture=25 o C, Video Input 1V p-p, 10-step grayscale. RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION. Figure 5. Typical Performances Parameter Test Conditions Min Typ Max Unit Type Picture-to-Sound ratio PS bit set to 0 PS bit set to 1 13 9 16 12 19 15 dB B Audio modulation depth Using specific pre-emphasis circuit, audio input level=205mVrms–audio frequency=1kHz AM modulation: SECAM Fs=6.5MHz — 80 — % B FM modulation: Fs=5.5, 6 or 6.5MHz 100% modulation=±50kHz FM deviation —80 — % B FM modulation: NTSC Fs=4.5MHz 100% modulation=±25kHz FM deviation —80 — % B Audio input resistance 45 53 61 K Ω A Audio Frequency response Reference 0dB at 1kHz, using specified pre-emphasis circuit, measure from 50Hz to 15kHz –2.5 — +2dB C Audio Distortion FM (THD only) at 1kHz, 100% modulation ( ±50kHz) No video —0.4 2 % C Audio Distortion AM (THD only) at 1kHz, 100% modulation No video —1.5 2.5 % D Audio S/N with Sync Buzz FM Ref 1Khz, 50% modulation (+/-25Khz) EBU color bars Video signal, using CCIR 468.2 weighting filter 48 53 — dB C Audio S/N with Sync Buzz AM Reference 1kHz, 85% modulation Video input EBU color bar 75% Audio BW 40Hz—15kHz Weighting filter CCIR 468-2 45 50 — dB D AudioSignal toNois e 46 48 50 52 54 56 58 471 521 571 621 671 721 771 821 871 Fr e que ncy (M hz ) Typical Minimum specification Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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