Specifications

Chapter 2 Command System RIGOL
M300 Programming Guide 2-229
TRIGger:SOURce
Syntax TRIGger:SOURce <source>
TRIGger:SOURce?
Description
Set the trigger mode to auto, manual, external, absolute time or alarm.
Parameters
Name
Type
Range
Default
<source> Discrete
{IMMediate|TIMer|BUS|EXTernal|ALARm1|
ALARm2|ALARm3|ALARm4|ABSolute}
IMMediate
Explanation  IMMediate: auto (continuous)
TIMer: auto (scan interval)
BUS: manual
EXTernal: external
ABSolute: absolute time
ALARm1|ALARm2|ALARm3|ALARm4: alarm
 In the IMMediate trigger mode, the trigger condition is always satisfied. Once the
instrument is in the "wait-for-trigger" state, the trigger is issued immediately.
 In the TIMer mode, the instrument waits for the specified interval (send the
TRIGger:TIMer command) and then performs the next scan after the current scan is
finished.
 In the BUS trigger mode and when the instrument is in the "wait-for-trigger" state
(send the
INITiate or READ?command), the instrument generates a trigger (measure a
channel in the scan list and then wait for the next trigger) each time the
*TRG
command is received. You cannot read the readings using the READ?
command or any
other query command (it is called the “Trigger Dead Area”).
 To use the external trigger mode, convert the [RS-232/Alarms/Ext Trig] interface
at the rear panel to two 9-pin interfaces using the mixed-interface separator line
(MIX-SEPARATOR accessory). Wherein, the 9-pin male interface is a standard RS232
interface and the 9-pin female interface is used for alarm output, external trigger
signal input (pin 6, as shown in the figure below) and so on. In the external trigger
mode, the instrument initiates a trigger when a TTL pulse (the edge is set by the
TRIGger:EDGE command, the pulse width is greater than 2μs and the pulse period
must be greater than 100μs) is received at the external trigger signal input terminal.
Alarm/Ext Trig interface
 In the absolute tiem trigger mode, the instrument triggers when the instrument
system time (determined by the
SYSTem:DATE and SYSTem:TIME commands) reaches
the specified time (determined by the
TRIGger:ABSolute command).
 In the
alarm trigger mode, the instrument triggers when alarm occur on the specified
alarm channel.
 To trigger when the trigger condition is met, the instrument must be in the
"wait-for-trigger" state (send the
INITiate or READ? command).
 The
CONFigure Command Subsystem and MEASure Command Subsystem commands
automatically set the trigger mode to IMMediate.
Pin 6: Ext Trig Input/Channel
Advance Input