Analog Devices AD9643 User Manual page 10

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6. If using the noise shaping requantizer (NSR) feature of
the AD6643, the settings in the ADC A and/or ADC B
pages must be changed (see Figure 14). The NSR Enable
checkbox must be selected under the NOISE SHAPED
REQUANTIZER 1(3C) section. This enables the circuitry
in the AD6643. To select the bandwidth mode, select 0 for
22% and 1 for 33% under the NSR Mode drop-down box
in the NOISE SHAPED REQUANTIZER 1(3C) section.
Upon selecting the bandwidth mode, select the desired
tuning word in the NSR Tuning drop-down box under the
NOISE SHAPED REQUANTIZER TUNING(3E) section.
Figure 13. SPI Controller, AD6649 ADC A Tab—95 MHz FIR Filter and Fixed-Frequency NCO Mode
Figure 14. SPI Controller, Example ADC A Tab—NSR Settings for the
AD9643/AD9613/AD6649/AD6643 User Guide
7. Click the Run button in the VisualAnalog toolbar (see
Figure 15).
Figure 15. Run Button (Encircled in Red) in VisualAnalog Toolbar,
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AD6643
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