TRIGger Subsystem
The TRIGger subsystem configures the triggering that controls measurement acquisition.
It is recommended that all triggered measurements be made using an appropriate fixed
manual range. That is, turn autorange off ([SENSe:]<function>:RANGe:AUTO OFF) or
set a fixed range using the [SENSe:]<function>:RANGe, CONFigure, or MEASure
command.
Command Summary
TRIGger:COUNt
TRIGger:DELay
TRIGger:DELay:AUTO
TRIGger:SLOPe
TRIGger:SOURce
TRIGger:COUNt {<count>|MIN|MAX|DEF|INFinity}
TRIGger:COUNt? [{MIN|MAX|DEF}]
Selects the number of triggers that will be accepted by the instrument before returning to the "idle" trigger state.
Parameter Typical Return
1 to 1,000,000 or continuous (INFinity). Default 1 +1.00000000E+00
For a continuous trigger (INFinity), the query returns
"9.9E37".
Return ten sets of five DC voltage measurements, using a positive-going external trigger to start each measurement
set:
CONF:VOLT:DC
SAMP:COUN 5
TRIG:COUN 10
TRIG:SOUR EXT;SLOP POS
READ?
Typical Response: +1.00520000E+01, … (50 measurements)
l You can use the specified trigger count in conjunction with a sample count (SAMPle:COUNt), which sets the
number of samples to be made per trigger. In this case, the number of measurements returned will be the sample
count multiplied by the trigger count.
l You can store up to 1,000 measurements in the reading memory of the 34460A or 10,000 measurements on the
34461A. If reading memory overflows, new measurements will overwrite the oldest measurements stored; the
most recent measurements are always preserved. No error is generated, but the Reading Mem Ovfl bit (bit 14) is
set in the Questionable Data Register's condition register (see Status System Introduction).
l A variable trigger count is not available from the front panel. If you set the trigger count and then go to local (front
panel), the instrument ignores the trigger count setting; however, when you return to remote, the trigger count
returns to the previous value you selected.
l This parameter is set to its default value after a Factory Reset (*RST) or Instrument Preset (SYSTem:PRESet).
254 Agilent Truevolt Series DMM Operating and Service Guide
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