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Model 6517B Electrometer Reference Manual
Section 14: SCPI command reference
6517B-901-01 Rev. C / August 2015
14-149
:SOURce <name>
This command is used to specify the arm, scan, and measure event control sources.
Usage
:ARM[:SEQuence[1]][:LAYer[1]]:SOURce <name>
:ARM[:SEQuence[1]]:LAYer2:SOURce <name>
:TRIGger[:SEQuence[1]]:SOURce <name>
:SOURce?
<name>
HOLD:
Hold operation in specified layer
IMMediate:
Pass operation through specified layer
RTCLock:
Select real-time clock as event (Arm Layer 1 only)
MANual:
Select manual event
BUS:
Select GPIB trigger as event
TLINk:
Select trigger link as event
EXTernal:
Select external triggering as event
TIMer:
Select timer as event (not available for Arm Layer 1)
Details
These commands are used to select the event control source for the specified layer. With
HOLD
selected, operation stops and waits indefinitely in the specified layer. While in
HOLD
, operation can be
continued by sending the
:IMMediate
command or the
:SIGNal
command. Keep in mind
however, that if the layer count is >1,
HOLD
is again enforced when operation loops back around.
With
IMMediate
selected (do not confuse
:SOURce IMMediate
with
:IMMediate
), operation
immediately passes through the specified layer.
A specific event can be used to control operation through a layer. With BUS selected, operation
continues when a GPIB trigger (
GET
or
*TRG
) is sent. With
TLINk
selected, operation continues
when an input trigger through the trigger link is received.
A real-time clock event is available for the arm layer (Arm Layer 1). With
RTCLock
selected, event
detection is satisfied at the programmed date and time allowing operation to continue on in the trigger
model (see the
IEEE-488 trigger model
(on page 11-16)).
A
TIMer
event is available for the scan and measure layers. With
TIMer
selected for the specified
layer, the event occurs at the beginning of the timer interval, and every time it times out. For example,
if the measure layer timer is programmed for a 30-second interval, the first pass through the measure
layer control source occurs immediately. Subsequent scan events occur every 30 seconds. The
interval for the timer is set using the
:TIMer <n>
(on page 14-150) command.
Also see
:TIMer <n>
(on page 14-150)