Keithley 263

OPERATION
MODEL 263
_--~_-------_----------~~~~~----~.
I
I
I
I
I
GUARD
I
No CONNECTlONS
I
I
I
I
; GUARD
, ENABLED
‘--_____-_--_-_-_-_-_____________1
Figure 3-16. Guarding for High Impedance Load
MODEL 263
,_--___-_____--___--_____I
I
OUTPUT
I
I
I
I
I
I
I
I
I
I
I
.-__--______----____-----
GUARD(VG)
Figure 3-17. Using PREAMP OUT Guard
3-18