So pretty excited about LH running a Z3801. But what I am seeing is a consitent stall roughly 45-50 minutes in. Using XP com1 a real port not usb. I have tried no control flow and XON/OFF no difference. I almost suspect LH is over running the Z3801 with complex requests. Using HP Satstat I see requests are every 2 seconds or so and that keeps running. Guidance appreciated. Thank you. Paul WB8TSL