3-4 DUT Test Connections Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Section 3 topics
Figure 3-2
Input/Output LO and chassis ground
Chassis
Screw
In/Out LO
(Chan A)
In/Out LOs are not connected
together and are electrically
isolated from chassis ground.
CHANNEL A
LO GLO HI G G G HI
SS
CHANNEL B
LO
GLOHIGGG
HI
SS
KEITHLEY Model 2602/2612 (rear panel)
Low-Noise
Chassis Ground
Banana Jack
In/Out LO
(Chan B)
terminals
Figure 3-3
FVR
Chassis
Series 2600
Signal
Ground
Chassis
Signal Ground is a local signal ground and defined as
the Low-Noise Chassis Ground Banana Jack.
Chassis is defined as the metal chassis of the Series 2600.
1) Frequency Variable Resistor (FVR)  Isolates
the SMUs from high frequencies on the chassis.
For DC to 60Hz, the FVR is a virtual short (zero
ohms).
2) DO NOT use the Chassis Screw terminal to
make signal connections to external circuitry.
High frequency (>1MHz) on the chassis may
result in higher noise at the output.
Chassis Screw terminal is connected to the metal chassis of the
Series 2600.
1
Chassis
Screw
2
Low-Noise
Chassis Ground
Banana Jack
Signal
Ground
Low-Noise Chassis Ground Banana Jack and Chassis Screw