The QED 993 is a Xlinix FPGA emulation of a PDP-11. It does not appear to be fully compatible with a J-11 processor. For example, it does not appear to have any FP11 instruction support, which is assumed to be present in a J-11. I haven't been able to get RSTS/E 10.1 or 2.11BSD to run on one I have so for me it is not as interesting as I had hoped.
I tested mine in a BA213 chassis. Should also work fine in a BA23 chassis.
-Glen