Datasheet

Page 9
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Programmable Output Resistance and DC Voltage/Current Output Emulation
Capabilities Solve Real-World Measurement Challenges
The B2961A/B2962A’s programmable output
resistance function provides flexible measurement
capabilities
The Keysight B2961A/B2962A has a programmable output
resistance feature that allows you to control the output behavior
of the power source. It supports two test modes, constant and
V/I emulation, to provide maximum flexibility and versatility.
Constant mode allows you to specify an output resistance value
(either positive or negative) such that the output will respond
exactly as if the specified resistance value were in series (voltage
source mode) or in parallel (current source mode) with the source
output. The constant mode can emulate resistance values over a
wide range, and the negative resistance capability is particularly
useful for cancelling out unwanted external resistances. For
example, you can use the negative resistance feature to eliminate
the resistance of long connection wires without the need to use
a 4-wire (Kelvin) connection scheme. This is especially useful in
situations where a 4-wire measurement is not possible due to
packaged device limitations or to the absence of sense pads for
probing.
DC voltage/current characteristic emulation feature
provides powerful bench-top analysis capabilities
The programmable output resistance’s V/I emulation mode
function allows you to simulate any DC voltage/current output
characteristic. You can specify up to 16 voltage and current
points to create the desired DC electrical characteristic. Since in
this mode the Keysight B2961A/B2962A responds exactly like the
equivalent device or sample, it is useful for simulating electrical
behavior when an actual component is not available as well as
for testing corner cases. In the example shown in Figure 14, the
output of an active device (solar cell) is simulated using the V/I
emulation mode function. This ability to simulate both active and
passive devices provides unprecedented power and flexibility in a
compact bench-top form factor. (Figure 15).
0
I
V
Set up to
16 points
Figure 15. The B2961A/B2962A can emulate the DC voltage/current
output characteristics of many devices and samples
Figure 13. Measurement situations that benefit from Programmable Output
Resistance’s Constant mode feature
Long cable/wire
Wiring inside of package Probe tip 4-wire cannot be
established
Figure 14. In V/I emulation mode you can specify up to 16 voltage/ current
points to synthesize a desired electrical characteristic