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3-4 Return to Section Topics 2600S-901-01 Rev. C / January 2008

Section 3: DUT Test Connections Series 2600 System SourceMeter® Instruments Reference Manual

As shown, there is a low-noise chassis ground banana jack that can be used as a common signal

ground point for Input/Output LOs. This low-noise signal ground banana jack is connected to the

chassis through a Frequency Variable Resistor (FVR).

The FVR (see Figure 3-4) is used to isolate the SMUs from high frequencies that may be present

on the chassis of the Series 2600. As frequencies on the chassis increase, the resistance of the

FVR increases to dampen its effects.

NOTE Keep in mind that the chassis should never be used as a ground

point for signal connections. High frequencies present on the chassis

of the Series 2600 may result in higher noise. The chassis should

only be used as a safety shield. Use the chassis screw for

connections to the chassis of the Series 2600.

For Model 2636, connect to ground on the ground module not to the

chassis screw.

Figure 3-3

Model 2602/2612 input/output LO and chassis ground

Model 2636 input/output and chassis ground

CHANNEL B

GGGG S

HI LO

CHANNEL A

GGG

Channel B Channel A

HI = Input/Output HI

S HI = Sense HI

G = Guard

S LO = Sense LO

LO = Input/Output LO

Captive screw (2 per terminal block)

Each terminal block uses two captive

screws to secure it to the rear panel.

terminals

Keithley 2635 Reference Manual

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