Hi DiSlord and All
I already used the standard load= 50.83 Ohm ( DC measur by a good Multimeter's) instead of 50.00 Ohm for the Nano calibration, and a Z0= 78.9 Ohm to optimise my nominal 75 Ohm coax for the SWR and graphic smith and all seems working smoothly as it's expected for S11, measurements , but still no deep try's for S21 except Thru tests with my H4+1.2.40.
Very satisfayed right now with some precautions, very handy options and allow very accurates measurements. it's a great options , indeed an accurate professional 50 Ohm Load is expensive .
Thanks .
73's Nizar
