To move your screen view using the keyboard shortcuts you can use simple menu macros assigned to given keys - e.g. to the combination of Ctrl+arrow on the numeric keypad.
This is e.g. a macro shifting the view left by 1/3 of the current view size:
'_-pan (trans (list (* -0.33 (getvar "viewsize")) 0) (- 1 (getvar "worlducs")) 1)
If you want to add the keyboard panning to your AutoCAD, load/add (see the command _CUILOAD) the menu file kbdpan.cuix from the section www.cadstudio.cz/download to your AutoCAD environment. Then you can use the combination Ctrl+arrows on your numpad (up, down, left, right) to pan the current view, always by a fixed amount - a third of the view size.