Keithley 4200A-SCS, Reference Manual

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Section 4: Multi-frequency capacitance-voltage unit Model 4200A-SCS Parameter Analyzer Reference Manual
4-36 4200A-901-01 Rev. C / February 2017
cap-iv-cv-matrix connections
The next figure shows the basic test configuration. Details on 4210-CVU connections are provided in
4210-CVU connections (on page 4-5). See Connections and configuration (on page 2-1) for details on
4200-SMU connections. Details on CVU connections to the matrix card are provided in Test
connections for a switch matrix (on page 4-7).
Use only the s
upplied (red) 100 Ω SMA cables for connections from the matrix card (rows E and F) to
the 4210-CVU. Be sure that all used SMA cables are the same length.
Use triaxial cables to connect the matrix cards (columns 1 and 2) to the capacitor or prober card.
Use the supplied triaxial cables to connect the SMUs to the matrix card (rows A and B).
After making or changing connections, be sure to use the Confidence Check diagnostic tool and do
connection compensation tests. Refer to
Confidence Check (on page 4-19) and Connection
compensation (on page 4-10) for details.
Figure 119: Simplified configuration to use a switching matrix for I-V and C-V testing
Formulas and constants
This project uses two formulas with no constants:
•
AVG_CAP: Calculates the average capacitance in farads (F).
AVG_CAP = AVG(CP_AB)
•
STD_DEV: Calculates the standard deviation of the capacitance measurements.
STD_DEV = STDEV(CP_AB)