Section 5: Pulse measure and pulse generator units
Model 4200A-SCS Parameter Analyzer Reference Manual
5-10
4200A-901-01 Rev. C / February 2017
There are two optional prober cable kits that are available from Keithley Instruments to provide
connections to a DUT:
•
4210-MMPC-S: Use this cable kit with the Suss Micro Tec PA200/300 series prober.
•
4210-MMPC-C: Use this cable kit with the Cascade Microtech 12000 series prober (manipulator
type DCM-200 series).
For details on using these prober cable kits, refer to Keithley document number PA-1000 for the
Suss prober cable kit and PA-1001 for the Cascade prober cable kit.
PMU common connections
Common LO for the PMU is the outer shells of the two SMA connectors. With an SMA cable
connected (see next figure), common LO is the outside shield of the cable.
Figure 149: PMU common low terminals
Because pulsing requires high frequency signal propagation, reduce cable inductance by minimizing
the loop area of the connection to the device under test (DUT). See the next figure and the following
figure for a graphic definition of the loop area for the coaxial cabling.
Because it would create a large loop area, do not use the GNDU as common low for the PMU. When
using the GNDU, an inductive loop area is created when the HI and LO leads are separated. Fast rise
times (dt), high current (di), and large inductances (L) can cause voltage overshoots, oscillations, and
ringing in the high speed measurement circuit. This is based on Lenz’s law: V = L di/dt.
