Keithley 7001, Инструкция по эксплуатации

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Front Panel Operation
4-57
Model 7001:
Scan List = 1!1-1!10,
Arm Layer:
Arm Spacing = Immediate*
Arm Trigger Control = Acceptor*
Arm Count = 1*
Scan Layer:
Scan Spacing = TrigLink
Input Line = # 2
Output Line = #1
Scan Trigger Control = Source
Number of Scans = 2
Channel Layer:
Channel Spacing = TrigLink
Trigger Link Mode = Asynchronous
Input Line = #4
Output Line = #3
Channel Trigger Control = Source*
Number of Channels = Use Scanlist Length*
* Indicates that the setting is the RESET (and factory) default
condition.
To run the test, simple press STEP on the Model 7001.
The following explanation on operation is referenced
to the operation model shown in Figure 4-25.
Pressing STEP takes the Model 7001 out of the
idle state and places operation at point A in the flow-
chart. Since the arm layer is programmed for Immedi-
ate Spacing, operation drops down to the scan layer at
point A.
Since Scan Trigger Control is set for Source, the
scan will not wait at point A for a trigger. Instead, it will
bypass “Wait for Trigger Link Trigger” and proceed to
point B. Note that this Bypass is only in effect on the
first pass through the model.
Since Channel Trigger Control is also set for
Source, the scan will not wait at point B for a trigger. In-
stead it will bypass “Wait for Trigger Link Trigger” and
close the first channel (point C). Note that this Bypass is
only in effect on the first pass through the model.
After the relay settles, the Model 7001 will output
a Trigger Link trigger pulse (point D). Since the instru-
ment is programmed to scan 10 channels, operation
will loop back up to point B where it will wait for an in-
put trigger. Note that Bypass is no longer in effect
The trigger pulse from the Model 7001 will trig-
ger the Model 196 to make a measurement of DUT #1.
After the measurement is completed, the DMM will
output a trigger pulse (point E).
The trigger applied to the Model 7001 from the DMM
closes the next channel in the scan which in turn trig-
gers the meter to measure the next DUT. This process
continues until all 10 channels are scanned and mea-
sured.
After the last channel is scanned and measured,
operation proceeds to point F where the Model 7001
outputs a trigger pulse. Since the Model 7001 is pro-
grammed to perform two scans, its operation will loop
back up to point A where it will wait for an input trig-
ger. Note that Bypass is no longer in effect.
The trigger pulse from the Model 7001 triggers
the Model 230 to output the next programmed voltage
level. After the voltage level is set, the Model 230 will
output a trigger pulse (point G).
The trigger pulse applied to the Model 7001 from the
Model 230 places operation at point B. The Bypass is
again in effect because this is the beginning of a new
scan. This allows operation to drop down to point C
where the first channel will again be closed and even-
tually measured. As previously explained all ten chan-
nels are scanned and measured.
After the last channel of the second scan is closed and
measured, the Model 7001 returns to the idle state.
A
B
C
D
E
F
G
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