User manual

Front Panel Operation
2001-900-01 Rev. K/ August 2010 3-73
multimeter to measure the next DUT. The process continues
until all ten channels are scanned and measured.
External Triggering and Trigger Link
As previously mentioned, the trigger pulses for the
asynchronous Trigger Link are identical to the trigger pulses
used for External Triggering. The only thing that prevents
them from being used together in a test system is connection
incompatibility. Trigger Link uses 8-pin micro-DIN
connectors while External Triggering uses BNC connectors.
This connection problem can be solved by using the Model
8502 Trigger Link Adapter. The adapter has two 8-pin
micro-DIN connectors and six BNC connectors. The micro-
DIN connectors mate directly to the Trigger Link connector
on the Model 2001 using a trigger link cable. The BNC
connectors mate directly to the External Triggering BNC
connectors on other instruments using standard male BNC to
BNC cables.
Figure 3-32 shows how a Keithley Model 706 Scanner can
be connected to the Trigger Link of the Model 2001 using the
adapter. With this adapter, a Model 706 could be substituted
for the Model 7001 in the previous example (Asynchronous
Trigger Link example #1). With the Model 706 set for
External Triggering, the test would start when the single scan
mode is selected and initiated.
Asynchronous Trigger Link example #2
In this example, the test system (Figure 3-33) includes a
Model 2001 to measure each DUT at two different bias
levels that are provided by a Model 230 voltage source. With
the source set to the first voltage level, the ten channels are
scanned and measured. The source is then set to the second
voltage level and the ten channels are again scanned and
measured.
Since this example uses an instrument that does not have
Trigger Link (Model 230), the Model 8502 Trigger Link
Adapter is required. Connections are shown in Figure 3-34.
cáÖìêÉ=PJPO
Connections using Trigger Link adapter
Trigger
Link
2001 Multimeter
Trigger
Link Cable
(8501)
706 Scanner
IN
OUT
External
Trigger
Channel
Ready
BNC to BNC
Cables (2)
(7501)
1
2
8502
Trigger
Link
Adapter