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TDA7786 数据表(PDF) 46 Page - STMicroelectronics |
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TDA7786 数据表(HTML) 46 Page - STMicroelectronics |
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46 / 54 page  Weak signal processing TDA7786, TDA7786M 46/54 DocID026122 Rev 5 5.1.3 Adjacent channel mute 5.1.4 Stereo blend Table 38. Adjacent channel mute - continuous set Symbol Parameter Test condition Min Typ Max Units ACMd Depth - SMd 0 0 dB Table 39. Stereo blend - continuous set Symbol Parameter Test condition Min Typ Max Units MaxSep Maximum stereo separation field strength = 80 dBµV, pilot deviation = 6.75 kHz 040 50 dB SBFSsp Start point vs. field strength separation = MaxSep - 1 dB no multipath present 20 50 60 dBµV SBFSep End point vs. field strength separation = 1 dB no multipath present 20 30 60 dBµV SBFStM2S Field strength-related transition time from mono to stereo Vrf step-like variation from 20 dBµV to 80 dBµV 0.001 3 20 s SBFStS2M Field strength-related transition time from stereo to mono Vrf step-like variation from 80 dBµV to 20 dBµV 0.001 0.5 20 s SBMPsp Start point vs. multipath separation = MaxSep - 1 dB equivalent 19 kHz AM modulation depth; field strength = 80 dBµV 510 80 % SBMPep End point vs. multipath separation = 1 dB equivalent 19 kHz AM modulation depth; field strength = 80 dBµV 530 80 % SBMPtM2S Multipath-related transition time from mono to stereo Vrf step-like variation from 20 dBµV to 80 dBµV 0.001 1 20 s SBMPtS2M Multipath-related transition time from stereo to mono Vrf step-like variation from 80 dBµV to 20 dBµV 0.001 0.001 20 s Pil ThrM2S Pilot detector stereo threshold Threshold on pilot tone deviation for mono-stereo transition 0.8 2.74 - kHz Pil ThrHyst Pilot detector threshold hysteresis Difference in Pil. det. deviation threshold for stereo to mono transition compared to PilThrM2S - 0.01 - kHz |
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