I haven't owned the P-5xe, but looking at the manual I would feel certain that:
1)For a 100 ohm load you would set the "100" DIP switch down and the "1000" DIP switch up.
2)For a 1000 ohm load you would set the "100" DIP switch up and the "1000" DIP switch down.
As an FYI, if you were to set them both down you would most likely get 90.9 ohms (the parallel combination of 100 and 1000 ohms). Both up is 47K, of course, as you indicated.
Enjoy! Regards,
-- Al
1)For a 100 ohm load you would set the "100" DIP switch down and the "1000" DIP switch up.
2)For a 1000 ohm load you would set the "100" DIP switch up and the "1000" DIP switch down.
As an FYI, if you were to set them both down you would most likely get 90.9 ohms (the parallel combination of 100 and 1000 ohms). Both up is 47K, of course, as you indicated.
Enjoy! Regards,
-- Al