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Model 6517B Electrometer Reference Manual
SOURCE
This menu item selects the event that controls the arm source.
IMMEDIATE: With this selection, operation passes immediately into the scan layer.
EXTERNAL: With this selection, external triggers are used to control the arm source. A trigger
stimulus applied to the Model 6517B passes operation into the scan layer. The external trigger is
applied to the rear panel trigger link connector. The front panel TRIG key (see MANUAL, below) 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. 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 6517B. See
model
(on page 11-16) for detailed information on bus triggers. The front panel TRIG key (see
MANUAL, above) is active with bus triggering selected. Pressing the TRIG key passes operation into
the scan layer.
TRIGLINK: With this selection, the arm source is controlled by the trigger link of the Model 6517B.
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 6517B receives a trigger
over the trigger link. The front panel TRIG key (see MANUAL, above) is active with the trigger link
selected. Pressing the TRIG key passes operation into the scan layer. After selecting TRIGLINK, you
are prompted to select an input line and then an output line. Note that you cannot use the same
trigger line for both input and output.
RT-Clock: With this selection, the arm source is controlled by the real-time clock. When the
programmed time and data occurs, the Model 6517B passes operation into the scan layer.
SET-TIME: Use this selection to set the time (hour, minute and second) for the arm event. Set the
time using the 12-hour format if "AM" or "PM" is displayed. Otherwise, set the time using the 24-
hour format.
SET-DATE: Use this selection to set the date (month, day, and year) for the arm event.
HOLD: When HOLD is selected, the arm source is suppressed. As a result, operation does not pass
into the scan layer until HOLD is cancelled by selecting one of the other arm source selections. Select
HOLD from the SELECT ARM SOURCE menu by placing the cursor on HOLD and pressing ENTER.
The instrument returns to the SETUP arm layer menu.
COUNT
This menu item defines the number of times operation returns to the arm layer.
INFINITE: Use this selection to continuously return operation to the arm layer.
ENTER-ARM-COUNT: With this selection, the user determines the number of times operation returns
to the arm layer. You can program the Model 6517B to arm up to 99999 times.
6517B-901-01 Rev. C / August 2015
Section 7: Triggering
IEEE-488 trigger
7-15
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