We plan to use the AD9172 in our system but for now we are looking for a way to rapidly test the system. It should act as:
- DDS system up to 3 GHz synthesized frequency; the frequency to be synthesized should be changed every ~200ns in a "low speed" way (that means: the input should be the frequency word via some CMOS/LVDS line, not high samples via JESD etc)
- Two output channels (I and Q) with individual phase/amplitude control for I/Q mismatch calibration
- The DDS system should listen to an UPDATE signal (issued every ~200ns) exactly at which the frequency output should change.
Actually, the complete system should act like the AD9958 but with synthesized frequency up to 3 GHz rather than 250 MHz.
The AD9172+FPGA satisfies these conditions but it takes man-years to build that from scratch. I am wondering if the evaluation boards (EVAL-AD9172, ADS7-V2EBZ, AD-HSDACFX3-EBZ) can be easily used to test this kind of setup.
Yes, the EVAL-AD9172 can be hooked up to an FPGA board directly with the FMC connector but again - it takes man-months/years to get it up and running.
For evaluation, I could even think storing test vectors of certain frequencies to be synthesized in some big RAM of ADS7-V2EBZ. However, the crucial part is synchronization with the (external) UPDATE signal.
Any insights are greatly appreciated. Thanks!