Keithley 237

+
Source Measure Unit
#1
Source Measure Unit #2
Output
LO
Ground
VUnk
Ground
Link~~
Output
LO
....
,.-~---~--
....
,'
Typical
ground
loop
~
\ causes current
flow
1
~
in
output
LO
lead.
1
'--~---~-/
Figure
2-80.
Multiple
Ground
Points
Create
Ground
Loop
Source Measure Unit
#1
Ground
'
_.....__
Earth
Ground
Source Measure Unit #2
OutputLO
I/
link
C~HI'--<~:------------:'~'>---1-0~
Output
LO
Figure
2-81.
Eliminating
Ground
Loop
+
,
-==-
Earth
Ground
SECTION2
Operation
2-115