Keithley 707B, Руководство пользователя

Страница: 53 / 80

Section 5: Working with the Series 2600A Models 707B and 708B 199BSwitching Matrix User's Manual
5-10 707B-900-01 Rev. B / June 2013
Example 3: Configure using TSP-Link and interactive triggers
This example uses a TSP script to configure and run the test. The script includes two separate
functions for configuring the Model 707B or 708B and System SourceMeter Instrument and a third
function for running the test. Configuration for both instruments is similar to examples 1 and 2 except
that TSP-Link trigger lines are used to coordinate the actions between the two instruments.
When the test is run, the instruments assert trigger signals after completing their respective actions.
After connecting the diode, the Model 707B or 708B sends a trigger signal to the System
SourceMeter instrument. The SMU then performs a single I-V sweep on the diode and sends a trigger
signal back to the Models 707B and 708B to indicate that the test is completed. Hardware
handshaking continues in this fashion until all six diodes have been tested. Data from the SMU is
returned to the controlling computer at the end of all the tests.
A TSP script is a sequence of instrument commands and programming statements. The Model 707B
or 708B can store the TSP script for later use. Using scripts allows the Model 707B or 708B to
perform simple and complex tasks with less interaction with the remote interface controller (the
controlling computer). For more information on using scripts, please see "Instrument Programming"
in the Models 707B and 708B Reference Manual.
Set up communication
In this example, in addition to the TSP-Link interface serving as a communication bus, it will also
serve as triggering bus to enable hardware handshaking between the System SourceMeter
instrument and Model 707B or 708B.
The communication setup is identical to the setup in Example 2; see Set up communication (on page
5-7).
There are three digital lines in the TSP-Link cable that may be used for triggering. This example uses
trigger lines 1 and 2. The Model 707B or 708B outputs a trigger signal on TSP-Link line 1 and waits
for a trigger signal on TSP-Link line 2 before proceeding with the next set of crosspoint closures. The
System SourceMeter instrument outputs a trigger signal on TSP-Link line 2 after completing its test
and waits for a trigger signal on TSP-Link line #1 before testing. The triggering setup is illustrated in
the figure below.
Figure 32: TSP-Link interface