Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 2: General operation
DMM7510-901-01 Rev. B / May 2015
2-127
Digitize functions
The Model DMM7510 digitize functions make fast, predictably spaced measurements. The speed,
sensitivity, and bandwidth of the digitize functions allows you to make accurate voltage and current
readings of fast signals, such as those associated with sensors, audio, medical devices, power line
issues, and industrial processes. The digitize functions can provide 1,000,000 readings per second at
4½ digits. Digitize voltage and digitize current have separate internal signal paths that are optimized
for fast response to signal changes.
The sample rate determines how often the readings are output by the digitize function. You can set it
from 1000 to 1,000,000 readings per second.
The aperture determines the reading conversion time. This is when data is gathered to create the
reading. You set the aperture time in 1 µs intervals. If the aperture is more than 1 µs, the consecutive
1 µs readings are averaged to produce the reading.
The sample rate affects the available aperture settings. The maximum aperture is determined by
1/sample rate (rounded down to the nearest integer). The instrument will automatically adjust the
aperture setting if the sample rate is changed to a rate that does not support the existing aperture
setting. When this occurs, a warning message is generated that reports the new aperture setting.
The count is the number of times to make readings with the selected sample rate and aperture after a
trigger is detected. In continuous mode, the instrument generates automatic triggers. In manual
mode, a trigger is defined by pushing the TRIGGER key on the front panel. You can also set up other
types of triggers. For more information on triggers, refer to
(on page 3-63).
If you are using the TSP command language, the commands use a different syntax for measure and
digitize commands. For example, command to change the measure function range is:
dmm.measure.range = 100
The command to change the digitize range is:
dmm.digitize.range = 100
Digitize voltage and digitize current support the same ranges as DC voltage (100 mV to 1000 V) and
DC current (10 µA to 3 A with front panel connections; 10 µA to 10 A with rear panel connections).
Digitize function do not support autorange, autozero, or auto delay.
Digitize voltage measurements
The digitize voltage function makes accurate, predictably spaced voltage measurements.
Do not apply more than 1000 V
peak
between INPUT HI and LO. Failure to observe this caution may
result in instrument damage.
