Tektronix Keithley 4200A-SCS Setup And Maintenance

Model 4200A-SCS Setup and Maintenance User's Manual Section 1: Introduction
4200A-908-01 Rev. A December 2020 1-3
Source-measure unit (SMU)
The fundamental instrument module used by the 4200A-SCS is the source-measure unit (SMU). The
basic function of a SMU is to perform one of the following source-measure operations:
• Source voltage and measure current or voltage
• Source current and measure voltage or current
The source of the SMU can be configured to sweep or step voltages or currents, or to output a
constant bias voltage or current.
There are medium-power and high-power source-measure units available. The 2 W medium-power
SMUs are models 4200-SMU and 4201-SMU. The 20 W high-power SMUs are models 4210-SMU
and 4211-SMU. The following table lists the maximum limits of the SMUs.
Source-measure units
Model
Maximum voltage
Maximum current
Maximum power
4200-SMU
4201-SMU
210 V
105 mA
2.2 W
4210-SMU
4211-SMU
210 V
1.05 A
22 W
Preamplifier
A 4200-PA preamplifier adds five low-current source-measure ranges to a SMU. Without a
preamplifier, the 100 nA range (100 fA resolution) is the lowest current source-measure range for a
SMU. With a preamplifier installed, the 10 nA, 1 nA, 100 pA, 10 pA, and 1 pA source-measure ranges
are added.
If preamplifiers are ordered, the 4200A-SCS is shipped from the factory with the preamplifiers
installed on the rear panel of the mainframe. The preamplifiers can be removed from the rear panel
and mounted remotely to reduce the effects of long cables on measurement quality (long cables can
add noise to low current measurements and can cause oscillation with some devices).
An installed preamplifier is matched to the SMU to which it is connected. Therefore, if you disconnect
the preamplifiers to mount them at a remote location, you must ensure that you reconnect each one
to its matching SMU.
Ground unit (GNDU)
The ground unit on the rear panel of the 4200A-SCS provides a convenient method of making ground
connections. This eliminates the need to use a SMU for this purpose.

Tektronix Keithley 4200A-SCS Specifications

General

Brand	Tektronix
Model	Keithley 4200A-SCS
Category	Measuring Instruments
Language	English