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AD9856/PCB 数据表(PDF) 6 Page - Analog Devices |
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AD9856/PCB 数据表(HTML) 6 Page - Analog Devices |
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6 / 32 page ![]() AD9856 –6– REV. B Typical Modulated Output Spectral Plots START 0Hz 5MHz/ STOP 50MHz 0 –8 REF LVL –25dBm 1AP –16 –24 –32 –40 –48 –56 –64 –72 –80 RBW 10kHz RF ATT 10dB VBW 1kHz SWT 12.5s Unit dBm Figure 1. QPSK at 42 MHz and 2.56 MS/s; 10.24 MHz External Clock with REFCLK Multiplier = 12, CIC = 3, HB3 On, 2 × Data START 0Hz 4MHz/ STOP 40MHz 0 –8 REF LVL –30dBm 1AP –16 –24 –32 –40 –48 –56 –64 –72 –80 RBW 10kHz RF ATT 10dB VBW 1kHz SWT 10s UNIT dBm Figure 2. 64-QAM at 28 MHz and 6 MS/s; 36 MHz External Clock with REFCLK Multiplier = 4, CIC = 2, HB3 Off, 3 × Data START 0Hz 8MHz/ STOP 80MHz 0 –8 REF LVL –25dBm 1AP –16 –24 –32 –40 –48 –56 –64 –72 –80 RBW 10kHz RF ATT 10dB VBW 1kHz SWT 20s Unit dBm Figure 3. 16-QAM at 65 MHz and 2.56 MS/s; 10.24 MHz External Clock with REFCLK Multiplier = 18, CIC = 9, HB3 Off, 2 × Data START 0Hz 5MHz/ STOP 50MHz 0 –8 REF LVL –30dBm 1AP –16 –24 –32 –40 –48 –56 –64 –72 –80 RBW 10kHz RF ATT 10dB VBW 1kHz SWT 12.5s UNIT dBm Figure 4. 256-QAM at 38 MHz and 6 MS/s; 48 MHz External Clock with REFCLK Multiplier = 4, CIC = 2, HB3 Off, 4 × Data |
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