Keithley 7001, Instruction Manual, Page: 90 / 353

Front Panel Operation
4-41
ceived by the Model 7001. See Section 5 for detailed in-
formation on bus triggers.
Note: The front panel STEP key (see MANUAL) is ac-
tive with bus triggering selected. Pressing the STEP
key will pass operation into the scan layer.
To select bus triggering from the SELECT ARM SPAC-
ING menu, place the cursor on GPIB and press ENTER.
The display will return to the SETUP ARM CONTROL
menu.
External

With this selection, external triggers are
used to control arm spacing. A trigger stimulus applied
to the Model 7001 will pass operation into the scan lay-
er. The external trigger is applied to the rear panel “EX-
TERNAL TRIGGER” BNC connector. See paragraph
4.10 for detailed information on external triggering.
Note: The front panel STEP key (see MANUAL) is ac-
tive with external triggering selected. Pressing the
STEP key will pass operation into the scan layer.
To select external triggering from the SELECT ARM
SPACING menu, place the cursor on EXTERNAL and
press ENTER. The instrument will return to the SETUP
ARM CONTROL menu.
Triglink

With this selection, arm spacing is controlled
by the Trigger Link of the Model 7001. Trigger Link is
an enhanced trigger system that uses up to six lines to
direct trigger pulses to and from other instruments.
Operation passes into the scan layer when the Model
7001 receives a trigger over the Trigger Link. See para-
graph 4.11 for details on using the Trigger Link.
Note: The front panel STEP key (see MANUAL) is ac-
tive with the Trigger Link selected. Pressing the STEP
key will pass operation into the scan layer.
To select the Trigger Link from the SELECT ARM
SPACING menu, place the cursor on TRIGLINK and
press ENTER. The following menu will be displayed:
SELECT INPUT LINE
#1
#2 #3 #4 #5 #6
The position of the cursor indicates the currently se-
lected input line.
To select a trigger input line for the Model 7001, place
the cursor on the desired line number and press EN-
TER. The following message will be displayed:
SELECT OUTPUT LINE
#1
#2 #3 #4 #5 #6
The position of the cursor indicates the currently se-
lected output line.
To select a trigger output line for the Model 7001, place
the cursor on a different line number and press EN-
TER. Note that you cannot use the same trigger line for
both input and output.
Hold

When HOLD is selected, arm spacing is sup-
pressed. As a result, operation will not pass into the
scan layer until HOLD is cancelled by selecting one of
the other arm spacing selections. Select HOLD from the
SELECT ARM SPACING menu by placing the cursor
on HOLD and pressing ENTER. The instrument will
return to the SETUP ARM CONTROL menu.
ARM-COUNT

This menu item is used to define the
number of times operation will return to the arm layer.
With the SETUP ARM CONTROL menu displayed, se-
lect this menu item by placing the cursor on ARM-
COUNT and press ENTER. The following menu will
be displayed:
ARM COUNT
INFINITE ENTER-ARM-COUNT
Infinite

Use this selection to continuously return op-
eration to the arm layer. Select continuous arming from
the ARM COUNT menu by placing the cursor on INFI-
NITE and pressing ENTER. The display will return to
the SETUP ARM CONTROL menu.
Enter-Arm-Count

With this selection, the user deter-
mines the number of times operation returns to the arm
layer. You can program the Model 7001 to arm up to
9999 times. Perform the following steps to enter the
arm count:
1. With the ARM COUNT menu displayed, place the
cursor on ENTER-ARM-COUNT and press EN-
TER. A message indicating the current arm count
will be displayed.
ARM COUNT = 0001
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