Front Panel Operation
2-49
DELAY
This delay is used to hold up operation in the scan layer.
After the scan event occurs, the instrument waits until the
delay period times out (0 to 999999.999sec) before proceed-
ing to the measure layer.
COUNT
This menu item defines the number of times operation
returns to the scan layer.
INFINITE: Use this selection to continuously return opera-
tion to the scan layer.
ENTER-SCAN-COUNT: With this selection, the user
determines the number of times operation returns to the scan
layer. You can program the Model 2002 to scan up to 99999
times.
CONTROL
Use this menu item to enable or disable the source bypass.
The source bypass is used to bypass the scan event on the
first pass through the scan layer.
SOURCE: With this selection, the source bypass is enabled.
The scan event will be bypassed on the first pass through the
scan layer. This allows operation to proceed into the measure
layer without having to wait for the programmed event.
ACCEPTOR: With this selection, the source bypass is
disabled.
2.7.4 Configuring the arm layer
The arm layer is used for the following operations:
• To select the arming event (SOURCE) for the instru-
ment.
• To designate the number of times the instrument is to be
armed (COUNT).
• To enable or disable the Source Bypass.
The arm layer is configured from the ARM item of the CON-
FIGURE TRIGGER menu, which is displayed by pressing
the CONFIG key and then the TRIG key. General rules for
navigating through the menu structure is contained in para-
graph 2.3.4.
SOURCE
This menu item selects the event that controls the arm
source.
IMMEDIATE: With this selection, operation passes imme-
diately into the scan layer.
EXTERNAL: With this selection, external triggers are used
to control the arm source. A trigger stimulus applied to the
Model 2002 passes operation into the scan layer. The exter-
nal trigger is applied to the rear panel “EXTERNAL TRIG-
GER” BNC connector. See paragraph 2.7.6 for detailed
information on external triggering.
NOTE
The front panel TRIG key (see MAN-
UAL) is active with external triggering
selected. Pressing the TRIG key passes
operation into the scan layer.
MANUAL: With this selection, the front panel TRIG key
controls the arm source. Operation passes into the scan layer
when the TRIG key is pressed.
NOTE
The front panel TRIG key is active when
EXTERNAL, GPIB, or TRIGLINK is
selected.
GPIB: With this selection, bus triggers control the arm
source. Operation passes immediately into the scan layer
when a bus trigger (GET or *TRG) is received by the Model
2002. See Section 3 for detailed information on bus triggers.
NOTE
The front panel TRIG key (see MAN-
UAL) is active with bus triggering
selected. Pressing the TRIG key passes
operation into the scan layer.
TRIGLINK: With this selection, the arm source is con-
trolled by the Trigger Link of the Model 2002. Trigger Link
is an enhanced trigger system that uses up to six lines to
direct trigger pulses to and from other instruments. Opera-
tion passes into the scan layer when the Model 2002 receives
a trigger over the Trigger Link. See paragraph 2.7.7 for
details on using the Trigger Link.
NOTE
The front panel TRIG key (see MAN-
UAL) is active with the Trigger Link
selected. Pressing the TRIG key passes
operation into the scan layer.
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