Keithley 6514, Инструкция по эксплуатации

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10-6 Limit Tests
Component handler interface
Model 6514 is interfaced to a component handler via the Digital I/O port as shown in Figure
10-6. The I/O port has four lines for output signals and one line for input signals. The input line
is used to start the test and the output lines are used to send the test pass/fail signal(s) to the com-
ponent handler to perform the binning operation.
The digital I/O lines are available at the DB-9 connector on the rear panel of Model 6514. A
custom cable using a standard female DB-9 connector is required for connection to Model 6514.
Start of test
The SOT (start of test) line of the Digital I/O is used to control the start of the testing process.
When /STest is the selected arm-in event for the arm layer of the trigger model, the testing pro-
cess will start when the SOT line is pulled low. When test is the selected arm-in event, the test
will start when the SOT line is pulled high. Section 9 provides details on trigger model config-
uration.
NOTE If you do not wish to use the SOT line to start the test, you can use the immediate
arm-in event. The testing process will start as soon as the LIMIT key is pressed
(assuming one or both limit tests are enabled).
The component handler will either maintain the SOT line high or low. This is its “not ready”
condition. When the component handler is ready (DUT properly position in the handler), it will
either pull the SOT line low or high to start the test.
6514
Out 1
Out 2
Out 3
Out 4
Gnd
Dig I/O
1
6
5
9
Input (SOT)
Handler
Line 1
Line 2
Line 3
Line 4 (or EOT)
SOT Strobe Line
Relay Clamp Voltage
V External
Figure 10-6
Handler inter-
face connections