I developed a system with the PXI-5660 and later upgraded it to use the PXI-5661 (when they discontinued the PXI-5620 digitizer). Today I see that the PXI-5661 last order date is 11/30/21.
I have a customer that wants to buy several systems over the next few years (first probably Jan 2022), so I need to upgrade again. Since we need to go as low as 2 MHz (the PXIe-5663 starts at 10 MHz), the logical choice (minimizing the redevelopment effort) is the PXIe-5665, but it's lifecycle state is "Mature" (meaning a few years from obsolete) and it's about $18K more expensive than the PXI-5661. Is there another option with a longer future lifecycle and/or closer to the cost point of the PXI-5661?