I am currently facing a synchronization problem between the DDS AD9914 (https://www.analog.com/en/products/ad9914.html) and an ADC card AD9656 (https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-ad9656.html).
I generate a chirp with the DDS. First, I would like to know on which pin of the DDS card, I can get the status of the ramp to make it a trig signal for the ADC card.
So as far as the ADC card is concerned, what kind of signal is needed to trig it, can I shape the pulse of the ramp status with to make it a square signal? What are the conditions for this card AD9656 to trigger correctly?
I tried several times to trigger with this card it never works. I tried all the tutorial of trigger issues but i still can't trig.
Is there any "experimental" explanation of the trigger issue of this ADC board with a waveform generator like the DDS AD9914?
Thank you for taking interest in our product. For your DDS card, you can get the status of the ramp which is exposed at pin 65. This also known as the DROVR pin.
I'm also copying a figure from the datasheet where it illustrates the behavior of DROVER.
For the ADC9656, Please give me a moment to consult it.
i tried to capture the DROVR signal with the AD9914 and i got this pulse with multiple steps, is it normal? why the pulse has several stages ? How to correct to have a real pulse train?
I'd like to know the peripherals that are connected on this pin. A schematic would work.