Keithley 6517A, Руководство пользователя

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Front Panel Operation
2-83
Model 6517A:
Idle State:
Bench reset =:INIT:CONT ON*
Arm layer:
Arm source = Immediate*
Arm count = 1*
Arm trigger control = Acceptor*
Scan layer:
Scan source = Immediate*
Scan count = Infinite*
Scan trigger control = Acceptor*
Measure layer:
Measure source = External
Measure count = Infinite*
Measure trigger control = Acceptor*
* Indicates that the setting is the BENCH RESET (and factory) default con-
dition.
Model 7001 or 7002:
Idle State:
Reset =:INIT:CONT OFF*
Scan List = 1!1-1!10,
Arm layer:
Arm spacing = Immediate*
Arm count = 1*
Arm trigger control = Acceptor*
Scan layer:
Scan spacing = Immediate*
Number of scans = 1
Scan trigger control = Acceptor*
Channel Layer:
Channel spacing = External
Number of channels = Use Scanlist length*
Channel trigger control = Source*
* Indicates that the setting is the RESET (and factory) default condition.
Notice that the Model 6517A is reset to BENCH defaults.
With this selection, the electrometer stays armed. Since the
arm source and scan source are set to Immediate, the Model
6517A waits in the measure layer for a trigger.
With the Channel Trigger Control of the switch system set
for Source, scan operation initially bypasses the need for an
external trigger to close the first channel. Since arm spacing
and scan spacing are set to Immediate, the scan starts as soon
as the scanner is taken out of the idle state by pressing the
STEP key. When the front panel STEP key is pressed:
• The scanner arms and closes the first channel.
• After Channel 1!1 settles, a trigger is sent from Channel
Ready of the Model 7001/7002 to External Trigger Input
of the Model 6517A to trigger a measurement of DUT #1.
• After the Model 6517A completes the measurement, it
outputs a trigger from Meter Complete Output to Exter-
nal Trigger of the Model 7001/7002, which closes the
next channel.
• After Channel 1!2 settles, a trigger is sent to the Model
6517A to trigger a measurement of DUT #2.
This process continues until all ten channels are scanned and
measured.
The data store capability of the Model 6517A could be used
to store the measurements as they occur. Just press the
STORE key to set the number of readings to store, then press
ENTER. The Model 6517A waits (with the asterisk annunci-
ator lit) for an external trigger from the Model 7001/7002 be-
fore taking a reading, storing it, and sending a trigger pulse.
External triggering example #2
External triggering can also be used in a test system consist-
ing of a Model 6517A Electrometer and a Model 706 Scan-
ner with an appropriate scanner card.
The external trigger connections are the same as those shown
in Figure 2-62 for the Models 6517A and 7001/7002. Chan-
nel Ready Output of the Model 706 is connected to External
Trigger Input of the Model 6517A. External Trigger Input of
the Model 706 is connected to Meter Complete Output of the
Model 6517A.
The trigger configuration of the Model 6517A does not
change from the previous example. The Model 706 is config-
ured for external triggering.
2.15.5 Trigger Link
The Model 6517A has enhanced external triggering capabil-
ities using the Trigger Link. The Trigger Link has six lines
allowing up to six instruments to be controlled over this trig-
ger bus. The pin layout of the 8-pin micro-DIN sockets used
for the Trigger Link is shown in Figure 2-63.
In general, Trigger Link input triggers to the Model 6517A
are used to control the measure operation. For the Model
6517A to respond to Trigger Link compatible triggers, the