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GS1524-CTDE3 Fiches technique(PDF) 1 Page - Gennum Corporation |
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GS1524-CTDE3 Fiches technique(HTML) 1 Page - Gennum Corporation |
1 / 18 page www.gennum.com GS1524 HD-LINX™ II Multi-Rate SDI Adaptive Cable Equalizer GS1524 Data Sheet 14976 - 7 June 2005 1 of 18 Key Features • SMPTE 292M, SMPTE 344M and SMPTE 259M compliant • automatic cable equalization • multi-standard operation from 143Mb/s to 1.485Gb/s • supports DVB-ASI at 270Mb/s • manual bypass (useful for low data rates with slow rise/fall times) • performance optimized for 270Mb/s and 1.485Gb/s • typical maximum equalized length of Belden 1694A cable: 140m at 1.485Gb/s, 350m at 270Mb/s •50 Ω differential output (with internal 50Ω pull-ups) • Pb-free and RoHS Compliant Key Specifications • cable length indicator for SMPTE 259M inputs • output mute based on max cable length adjust or manual override • single 3.3V power supply operation • operating temperature range: 0°C to +70°C Applications • SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces Description The GS1524 is a second-generation high-speed bipolar integrated circuit designed to equalize and restore signals received over 75 Ω co-axial cable at data rates from 143Mb/s up to 1.485Gb/s. The GS1524 is designed to support SMPTE 292M, SMPTE 344M and SMPTE 259M, and is optimized for performance at 270Mb/s and 1.485Gb/s. The GS1524 features DC restoration to compensate for the DC content of SMPTE pathological test patterns. The GS1524 also incorporates a Cable Length Indicator (CLI) that provides an indication of the amount of cable being equalized for data rates up to 360Mb/s. A voltage programmable mute threshold (MCLADJ) is included to allow muting of the GS1524 output when an approximate selected cable length is reached for SMPTE 259M signals. This feature allows the GS1524 to distinguish between low amplitude SD-SDI signals and noise at the input of the device. The CD/MUTE pin provides an indication of the GS1524 mute status in addition to functioning as a mute control input. The SD outputs of the GS1524 may be forced to a mute state by applying a voltage to the CD/MUTE pin. Power consumption is typically 265mW using a 3.3V power supply. This component and all homogeneous subcomponents are RoHS compliant. Functional Block Diagram CABLE LENGTH INDICATOR/ADJUSTOR CARRIER DETECT MUTE EQUALIZER DC RESTORE OUTPUT AGC CLI CD/MUTE SDO BYPASS SDO SDI SDI MCLADJ |
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