Keithley 6482, Справочное руководство

Страница: 119 / 350

8-16 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 8: Triggering Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Arm layer
Arm detector event bypass: As shown in Figure 8-9 , there is a bypass for the Arm Event
Detector (ARM:DIRection). This bypass can only be used if TLINk, PSTest, NSTest, or BSTest is
the selected arm-in event. The bypass serves to continue operation. With the bypass set to
SOURce, operation will loop around the Arm Event Detector when an INITiate command is sent
(assuming the output is turned ON).
The programmable arm-in events for the arm layer are described as follows:
IMMediate : Event detection occurs immediately, allowing operation to continue.
BUS : Event detection occurs when a bus trigger (GET or *TRG) is received.
TIMer : Event detection occurs immediately on the initial pass through the trigger model. Each
subsequent detection is satisfied when the programmed timer interval elapses. The timer resets to
its initial state when the instrument goes into an idle state.
MANual : Event detection occurs when the TRIG key is pressed. The Model 6482 must be in
LOCAL mode for it to respond to the TRIG key. Press the LOCAL key or send GTL over the bus to
take the Model 6482 out of remote operation.
TLINk : Event detection occurs when an input trigger using the trigger link input line is received
(see “Trigger link” for more information). With TLINk selected, you can loop around the Arm Event
Detector by setting the event detector bypass (ARM:DIRection) to SOURce.
NSTest : Event detection occurs when the start of test (SOT) line of the OUTPUT ENABLE
connector is pulsed low.
PSTest : Event detection occurs when the SOT line of the OUTPUT ENABLE connector is pulsed
high.
BSTest : Event detection occurs when the SOT line of the OUTPUT ENABLE connector is pulsed
either high or low.
NOTE NSTest, PSTest, and BSTest can be used only at the beginning of a sweep and should
not be used to trigger each point in a sweep.
See “Input (SOT) line” on page 11-2 for
more information.
Trigger layer
The trigger layer uses three event detectors; one for each action (source, delay, and measure).
Source event detector bypass : As shown in Figure 8-9 , there is a bypass (TRIGger:DIRection)
for the source event detector. This bypass is in effect only if TLINk is the selected trigger-in source.
With this event detector bypass set to SOURce, operation will proceed around the source event
detector.
The programmable trigger-in sources for the trigger layer are described as follows:
IMMediate: With immediate selected, event detection for the three detectors is satisfied
immediately. Operation proceeds through the trigger layer to perform the source, delay, and
measure actions.
TLINk : With TLINk selected, event detection at each enabled detector occurs when an input
trigger using the trigger link input line is received. A detector is enabled by including its parameter
name with the TRIGger:INPut command.
For example, to enable the delay event detector and measure event detector, the following
command must be sent:
TRIGger:INPut DELay, SENSe