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XTAL-AEL-301-SERIES Datasheet(PDF) 7 Page - Analog Devices |
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XTAL-AEL-301-SERIES Datasheet(HTML) 7 Page - Analog Devices |
7 / 12 page Evaluation Board User Guide UG-272 Rev. A | Page 7 of 12 RESET AND SWEEP The reset software command is set using the button shown in Figure 11. To set up a DDS sweep, click Sweep. Figure 11. Software Reset and Sweep Select The sweep function allows users to load a start frequency, stop frequency, increment size, number of loops, and delay between each frequency increment. These commands are then loaded to the part automatically from the EVAL-SDP-CB1Z board. Figure 12. Sweep Functionality EXAMPLE OF OPERATION An example of configuring the AD9833 to output 10 kHz follows: 1. Plug the EVAL-SDP-CB1Z board into the EVAL- AD9833SDZ board and connect to the USB port. 2. Start up the software located at Start/All Programs/ Analog Devices/AD9833/AD9833 Eval Board. You should see the SDP board communicating with the PC. 3. Select connectorA or connectorB; this must match what the AD9837 test chip is connected to. 4. Define MCLK; the default is an on-board 25 MHz oscillator. 5. Ensure that all links are in the correct locations (see Table 1). 6. Select the FREQ 1 register. 7. Load a 10 kHz excitation frequency and click Enter. The output should appear on the IOUT and IOUTB outputs on the evaluation board. For the FREQ 0 register, • Select the FREQ 0 register. • Load the FREQ 0 register with 20 kHz and click Enter. For the FREQ 1 register, • Select the FREQ 1 register to load the 10 kHz associated with this register. CH1 100mV M20µs A CH1 182mV 1 T 0s CH1 FREQ 10kHz CH1 p-p 596mV Figure 13. 10 kHz Output Signals on an IOUT Test Point |
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