Evaluation board for 2.7 ghz dds-based agilerf synthesizer (12 pages)
Summary of Contents for Analog Devices AD9695
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External Pulse Generator (Such as Stanford Research Systems DS345) ADC Evaluation Board AD9695 Evaluation Board, or others in family (Such as AD9689 or AD9 208) External Power Supply and Three 10-pin Ribbon Cables External Input Clock (Such as Rohde&Schwarz SMA100A) External Reference Clock (Such as Stanford Research Systems SG384) External Signal Input (Any signal generator, such as Rohde&Schwarz SMA100A)
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(Note: Though AD9695 is mentioned in this document, this procedure also applies to the AD9689 and AD9208) Setup the AD9695 evaluation board as described in the AD9695 User Guide. Verify that the evaluation board is converting and processing data normally as specified in the User Guide.
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AD9695 External Trigger Quick Start Guide Figure 3: Time Capture of Trigger Pulse Setup an external signal generator or other appropriate hardware, using the Ready signal if desired, to provide a 0 →1.5V+ rising edge on SMA1 J5 to trigger a capture. Note that the external pin must be driven for external trigger mode – if it is left floating, the FPGA will function as though it is not i n external trigger mode, regardless of the mode it is put into.
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AD9695 External Trigger Quick Start Guide Clicking the Settings button above will bring up a window with three tabs. In the Capture Board tab, enter a number like 10000 into the Fill Delay (ms) field. This is the amount of time the FPGA will poll the FIFO for a data capture before timing out.
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AD9695 External Trigger Quick Start Guide Apply the rising edge on J5. This edge needs to be applied before the end of the Fill Delay interval specified in Step 4. If 10000 was entered in Step 6, you will have 10000 milliseconds from when the Run button was pushed, to apply the edge.
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AD9695 External Trigger Quick Start Guide 3. I’m getting the following error message: Figure 10: FIFO Not Ready This is a similar error to Error 2 that may result from the Ready status and Trigger Input signals being mistimed, or it may just be a program error.
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