Keithley 2520, Руководство пользователя, Страница: 248 / 329

Model 2520 User’s Manual SCPI Command Reference 14-59
Query
:SOURce? Query programmed control source
Description
This command is used to select the event control source. With IMMedi-
ate selected, operation immediately continues.
A specific event can be used to control operation. With TLINk selected,
operation continues when a trigger pulse is received via the Trigger
Link.
With TIMer selected, the event occurs at the beginning of the timer
interval, and every time it times out. For example, if the timer is pro-
grammed for a 30 second interval, the first pass through the control
source occurs immediately. Subsequent trigger events will then occur
every 30 seconds. The interval for the timer is set using the :TIMer com-
mand.
With MANual selected, the event occurs when the TRIG key is pressed.
With BUS selected, the event occurs when a GET or *TRG command is
sent over the bus.
With NSTest selected, the event occurs when the SOT (start-of-test) low
pulse is received via the Digital I/O port SOT line.
With PSTest selected, the event occurs when SOT (start-of-test) high
pulse is received via the Digital I/O port SOT line.
With BSTest selected, the event occurs when SOT (start-of-test) high or
low pulse is received via the Digital I/O port SOT line.
TIMer <n>
:TRIGger[:SEQuence[1]][:LAYer[1]]:TIMer <n> Set interval for trigger layer timer
Parameters
<n> = 0 to 99999.99 Specify timer interval in seconds
DEFault Sets timer to 0.1
MINimum Sets timer to 0
MAXimum Sets timer to
Query
:TIMer? Queries programmed timer interval
:TIMer? DEFault Queries *RST default interval
:TIMer? MINimum Queries lowest allowable interval
:TIMer? MAXimum Queries largest allowable interval
Description
This command is used to set the interval for the timer. Note that the
timer is in effect only if the timer is the selected control source.