Front Panel Operation
4-53
For this example, the Model 7001 and the meter are
configured as follows:
Model 7001:
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 = TrigLink
Trigger Link Mode = Asynchronous
Input Line = #2
Output Line = #1
Channel Trigger Control = Source*
Number of Channels = Use Scanlist Length*
* Indicates that the setting is the RESET (and factory) default
condition.
Meter:
Arm Layer:
Arm Source = Immediate
Arm Count = 1
Arm Trigger Control = Acceptor
Scan Layer:
Scan Source = Immediate
Scan Count = 1
Scan Trigger Control = Acceptor
Measure Layer:
Measure Source = TrigLink
Trigger Link Mode = Asynchronous
Input Line = #1
Output Line = #2
Measure Trigger Control = Acceptor
Measure Count = 10
Notice that Channel Trigger Control of the Model 7001
is set for Source. With this selection, scan operation will
initially bypass the need for a Trigger Link trigger to
close the first channel. Since arm spacing and scan
spacing are set for Immediate, the scan will start imme-
diately as soon as the scanner is taken out of the idle
state by pressing the STEP key (assuming the meter is
also out of the idle state).
To run the test simply press TRIG on the meter to take
it out of the idle state and then press STEP on the Mod-
el 7001. The following explanation on operation is ref-
erenced to the operation model shown in Figure 4-21.
Pressing TRIG takes the meter out of the idle
state and places meter operation at point A in the flow-
chart where it is waiting for a Trigger Link trigger. Note
that since both the arm layer and scan layer are pro-
grammed for Immediate Source, operation immedi-
ately drops down to the measure layer at point A.
Pressing STEP takes the Model 7001 out of the
idle state and places operation at point B in the flow-
chart. Since both the arm and scanner layers are pro-
grammed for Immediate Spacing, operation drops
down to the channel layer at point B.
Since Channel Trigger Control is set for Source,
the scan will not wait at point B for a trigger. Instead it
will bypass “Wait for Trigger Link Trigger” and close
the first channel (point C). Note that the 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.
& Remember that meter operation is at point
A waiting for a trigger. The output trigger from the
Model 7001 triggers the meter to measure DUT #1
(point E). After the measurement is completed, the
meter will output a trigger pulse (point F) and then
loop back to point A where it will wait for another in-
put trigger.
The trigger applied to the Model 7001 from the
meter closes the next channel in the scan which in
turn triggers the meter to measure the next DUT.
This process continues until all 10 channels are
scanned and measured.
A
B
C
D
E F
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