Chapter 6 Command Reference 207
NRDGS
Designates the number of readings per trigger event. The valid range for this
parameter is 1 to 16777215. (The count parameter also corresponds to the record
parameter in the RMEM command. Refer to the RMEM command for details.)
Power-on count = 1.
Default count = 1.
event
Designates the event that initiates each reading (sample event). The event
parameter choices are:
* The TIMER or LINE event cannot be used for sampled AC or AC+DC voltage
measurements (SETACV RNDM or SYNC) or for frequency or period measurements.
** The LEVEL sample event can be used only for DC voltage and direct-sampled
measurements.
Power-on event = AUTO.
Default event = AUTO.
Remarks • Since the TIMER event designates an interval between readings, it only applies
when count is greater than one. The first reading occurs without the TIMER
interval. However, you can insert a time interval before the first reading with
the DELAY command. (The TIMER event suspends autoranging.)
• You can use the SWEEP command to replace the two commands: NRDGS
n,TIMER and TIMER n. The SWEEP command specifies the number of
readings and the interval between readings. These commands are
interchangeable; the multimeter uses whichever command was executed last in
the programming. Executing the SWEEP command automatically sets the
sample event to TIMER. In the power-on, RESET, and PRESET states, the
multimeter uses the NRDGS command.
• When SYN is used for more than one of the trigger arm, trigger, or sample
event
Parameter
Numeric
Query
Equiv. Description
AUTO 1 Initiates reading whenever the multimeter is not busy
EXTSYN 2 Initiates reading on negative edge transition on the
multimeter's external trigger input connector
SYN 5 Initiates reading when the multimeter's output buffer is
empty, reading memory is off or empty, and the
controller requests data.
TIMER* 6 Similar to AUTO with a time interval between successive
readings (specify interval with the TIMER command)
LEVEL** 7 Initiates reading when the input signal reaches the
voltage specified by the LEVEL command on the slope
specified by the SLOPE command.
LINE* 8 Initiates reading on a zero crossing of the AC line voltage
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