User`s manual

Parameters
Parameter Name Parameter Type Range of Values Default Units
<source>
discrete BUS | EXT | HOLD | IMMediate |
TTLTrg0 - TTLTrg7
none
Comments • The TRIGger:SOURce command only selects the trigger source. You must use
the
INITiate command to place the multimeter in the wait-for-trigger state. (The
MEASure command automatically executes an INITiate command.)
•
TRIGger:SOURce EXT
uses the multimeter’s External Trigger BNC connector as
the trigger source. The multimeter triggers on the falling (negative-going) edge of
a TTL input signal.
•
TRIGger:IMMediate
causes a trigger to occur immediately provided the
multimeter is placed in the wait-for-trigger state using
INITiate.
• When TRIGger:SOURce BUS is selected, ABORt returns the multimeter to the
idle state. When a Group Execute Trigger (
GET) bus command or *TRG common
command is executed, the “Trigger ignored” error is generated.
• When TRIGger:SOURce HOLD is selected, ABORt returns the multimeter to the
idle state. All subsequent single triggers sent using
TRIGger:IMMediate are
ignored and the “Trigger ignored” error is generated.
• The CONFigure and MEASure command subsystems automatically set the trigger
source to
TRIG:SOUR IMM.
• The READ? command cannot be used if the trigger source is TRIG:SOUR BUS or
TRIG:SOUR HOLD.
• Related Commands: ABORt, INITiate, TRIGger:IMMediate
•
*RST Condition: TRIG:SOUR IMM
Example Setting the Sample Source
CONF:VOLT:DC (@100:104) !Function: DC voltage;
specify channel list.
TRIG:SOUR EXT !Trigger source is external BNC on
multimeter front panel.
TRIG:COUN 10 !Multimeter will accept 10 external triggers
(5 channels will be scanned with each
trigger).
READ? !Place multimeter in wait-for-trigger state;
make measurements when external trigger is
received; send readings to output buffer.
enter statement !Enter readings into computer.
:SOURce?
TRIGger:SOURce? returns “BUS”, “EXT”, “HOLD”, or “IMM” to show the present
trigger source. The quoted string is sent to the output buffer.
Chapter 5 Command Reference 184