User`s guide

Functions and Features 2
34450A User’s Guide 61
Software (Bus) Triggering
The bus trigger mode is available from the remote interface
only.
The bus trigger mode is initiated by sending a bus trigger
command, after selecting BUS as the trigger source.
• The TRIGger:SOURce BUS command selects the bus
trigger source.
• The MEASure? command overwrites the BUS trigger and
triggers the DMM and returns a measurement.
• The READ? command does not overwrite the BUS trigger,
and if selected, generates an error. It will only trigger the
instrument and return a measurement when the
IMMEdiate trigger is selected.
• The INITiate command only initiates the measurement
and needs a trigger (BUS or EXTernal or IMMEdiate) to
make the actual measurement.
Refer to the Keysight 34450A Programmer’s Reference
Helpfile for the complete description and syntax for these
commands.