User manual

6-24 Source-Measure Concepts 2400 Series SourceMeter

User’s Manual

Figure 6-14

Source I

Source V

When configured to source voltage (V-Source) as shown in Figure 6-15, the

SourceMeter functions as a low-impedance voltage source with current limit capa-

bility and can measure current (I-Meter) or voltage (V-Meter).

Sense circuitry is used to continuously monitor the output voltage and make

adjustments to the V-Source as needed. The V-Meter senses the voltage at the

Input/Output terminals (2-wire local sense) or at the DUT (4-wire remote sense

using the sense terminals) and compares it to the programmed voltage level. If the

sensed level and the programmed value are not the same, the V-Source is

adjusted accordingly. Remote sense eliminates the effect of voltage drops in the

test leads ensuring that the exact programmed voltage appears at the DUT.

NOTE The voltage error feedback to the V-Source is an analog function. The

source error amplifier is used to compensate for IR drop in the test leads.

Remote

SENSE HI

IN/OUT HI

Remote

IN/OUT LO

I-Source

V-Meter

SENSE LO

Local

GUARD SENSE

GUARD

–

I-Meter