Analog Devices Comprehensive Guide for AD9273 Evaluation Board Configuration and Setup

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Evaluation Board User Guide	UG-001

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Figure 18. SPI Controller, MODES(8) Box

7.In the ADC x tab of the SPI Controller, where x is the channel to which an analog input is applied, find the CROSSPOINT SWITCH(2D) box. From the Crosspoint Switch Modes drop-down box, select the cwd2p/n option (see Figure 19).

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Figure 19. SPI Controller, CROSSPOINT SWITCH(2D) Box

8.Examine the spectrum analyzer for the CW Doppler output (see Figure 20 for an example).

	0
	–10
	–20			FREQUENCY = 2.3MHz
	–20			CWD1±, DIFFERENTIAL OUTPUT
				CWD1±, DIFFERENTIAL OUTPUT
(dBm)	–30
(dBm)	–40
AMPLITUDE	–50
	–50
	–60
	–70
	–80					-07782004
	–90					-07782004
	–90
	–100	5	10	15	20	25
	0	5	10	15	20	25

FREQUENCY (MHz)

Figure 20. Typical Spectrum Analyzer Display of CWD Output

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Contents Documents Needed FeaturesTypical Measurement Setup Equipment NeededTable of Contents Output Signals Power SuppliesInput Signals Evaluation Board Connection Default Operation Jumper Selection Settings DOUTx+, DOUTx− Setting Up the ADC Data Capture Block Evaluation Board Software Quick Start ProceduresConfiguring the Board Using the Software for Testing VisualAnalog, Main Window Setting Up the SPI ControllerClick the Run button in the VisualAnalog toolbar Adjusting the Amplitude of the Input Signal Using the Integrated Crosspoint Switch CW Doppler ModeSPI Controller, MODES8 Box Evaluation Board Schematic, DUT Analog Input Circuits Evaluation Board Schematics and ArtworkRev Page 13 Evaluation Board Schematic, DUT, VREF, and Decoupling Evaluation Board Schematic, Clock, SPI, and Gain Circuits Rev Page 16 Evaluation Board User Guide Evaluation Board Layout, Ground Plane Layer Evaluation Board Layout, Power Plane Layer Rev Page 20 Rev Page 21 Evaluation Board Layout, Bottom Side Bill of Materials Ordering InformationERJ-2RKF1240X ESD Caution