Agilent Technologies 3458A User Manual page 207

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:
event
Parameter
AUTO
EXTSYN
SYN
TIMER*
LEVEL**
LINE*
* 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
Numeric
Query
Equiv. Description
1 Initiates reading whenever the multimeter is not busy
2 Initiates reading on negative edge transition on the
multimeter's external trigger input connector
5 Initiates reading when the multimeter's output buffer is
empty, reading memory is off or empty, and the
controller requests data.
6 Similar to AUTO with a time interval between successive
readings (specify interval with the TIMER command)
7 Initiates reading when the input signal reaches the
voltage specified by the LEVEL command on the slope
specified by the SLOPE command.
8 Initiates reading on a zero crossing of the AC line voltage
Chapter 6 Command Reference
NRDGS
207