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AD9873

Analog Front End Converter for Set-Top Box, Cable Modem

Analog Devices 

AD9873

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FREQUENCY OFFSET – MHz

TPC 8a. Single Sideband @ 65 MHz, RBW = 500 Hz

fC = 66 MHz, f = 1 MHz, RSET = 10 kΩ (IOUT = 4 mA)

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FREQUENCY OFFSET – MHz

TPC 8b. Single Sideband @ 65 MHz, RBW = 500 Hz

fC = 66 MHz, f = 1 MHz, RSET = 4 kΩ (IOUT = 10 mA)

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FREQUENCY OFFSET – kHz

TPC 9. Single Sideband @ 65 MHz, RBW = 50 Hz

fC = 66 MHz, f = 1 MHz, RSET = 10 kΩ (IOUT = 4 mA)

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FREQUENCY OFFSET – kHz

TPC 10. Single Sideband @ 65 MHz, RBW = 10 Hz

fC = 66 MHz, f = 1 MHz, RSET = 10 kΩ (IOUT = 4 mA)

TYPICAL QAM TRANSMIT PERFORMANCE CHARACTERISTICS

(16-QAM, 2.56 Mbit/s SINC Filter Enabled, Square Root Raised Cosine Filter with Alpha = 0.25, RSET = 4 k⍀

[IOUT = 10 mA], fSYSCLK = 163.84 MHz, fOSCIN = 20.48 MHz [M = 8, N = 4].)

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FREQUENCY – MHz

TPC 11. 16-QAM @ 42 MHz Spectral Plot, RBW = 1 kHz

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FREQUENCY – MHz

TPC 12. 16-QAM @ 5 MHz Spectral Plot, RBW = 1 kHz

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