Section 7: Measuring I-V characteristics of FETs
Model 2450 Interactive SourceMeter® Instrument User's Manual
7-4
2450-900-01 Rev. A / June 2013
Figure 30: Connections for the TSP command set
For GPIB communication from the computer to the Model 2450 instruments, only one cable is
necessary from the GPIB interface to one of the Model 2450 IEEE-488 interfaces (Model 2450 #1 in
the figure above).
Set the TSP-Link node of Model 2450 #1 to node 1 and the TSP-Link node of Model 2450 #2 to
node 2.
To change the Model 2450 TSP-Link nodes from the front panel:
1. Press the communication status indicator on the upper left corner of the home screen, and then
select
Change Settings
. The SYSTEM COMMUNICATION window opens.
2. On the
TSP-Link
tab, select the button next to Node and enter the node number you want.
3. Select
Initialize.
4. Press the
MENU
key to return to the home screen.
Repeat this instruction for all Model 2450 instruments in your TSP-Link network.
Device connections
To perform a drain family of curves, configure both Model 2450 instruments to source voltage and
measure current.
In this circuit, the Force HI terminal of Model 2450 #2 is connected to the gate of the MOSFET, and
the Force HI terminal of Model 2450 #1 is connected to the drain.
The source terminal of the MOSFET is connected to the Force LO terminals of both Model 2450
instruments. A third Model 2450 is required if you want to source and measure from all three
terminals.
An I-V test configuration for a MOSFET using two Model 2450 instruments is shown in the following
figure.
