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8.3.5.1.1 Sampling Frequency
The sampling frequency can be adjusted up to 4 kHz. The power consumption while recording is
roughly proportional to the sampling frequency. The Battery scale in the Setup panel indicates how long
the instrument can record for as a function of sampling frequency.
When recording raw signals the amount of memory consumed is proportional to the sampling
frequency. The Memory-Depth indicator in the Setup panel automatically calculates the overall
recording time as a function of the selection.
8.3.5.1.2 High-Pass Filter
The high-pass filter can be selected or deselected by clicking on the checkmark. The field on the left is
used to adjust the cutoff frequency. Thanks to its very high resolution, the high-pass filter can be
adjusted to frequencies that are extremely low relative to the sampling frequency.
8.3.5.1.3 Auto-Rec Settings
These settings adjust the trigger threshold and the inactivity period. Once the instrument is placed in
Auto-Rec mode it switches between two states:
•
Waiting for activity
defined as "signal that transitions through the threshold on at least one axis". The signal must
be below, then above the threshold to trigger the recording. When activity is detected the
instrument creates a new record and starts recording. The threshold is the same on all axes.
•
Waiting for inactivity
defined as "signal that stays below the threshold on all three axes for a time longer than the
inactivity period". When inactivity is detected the instrument stops the ongoing recording.
Therefore the inactivity time defines the minimum amount of time that the instrument will
record, once triggered. The recording will keep going if the signal keeps passing the threshold
while the recoding is ongoing.
WiFi™
8.3.5.1.4 Timer/
This control defines the action to take when the timer is engaged, or if the recoding is started via WiFi™
through the server. The choices are:
•
Record:
date.
•
Auto-Rec:
specified time and date.
8.3.5.1.5 Log Interval
The log interval defines the time between two successive recorded points when the instrument is
recording signal statistics or RMS level statistics. When recording either type of statistics the min, max
and average are reset at the beginning of each log interval. Then the instrument observes the signals
or levels for the duration of the log interval, and updates the min, max and averages accordingly. At the
end of the log interval the selected statistics are written to memory. Then the next log interval is
started... and so on until the recording is stopped or the memory is exhausted.
User's Manual
While in inactive mode the instrument waits for activity. Activity is
While recording, the instrument waits for inactivity. Inactivity is
Operation
The recording will start once the timer has reached the specified time and
The instrument will go to Auto-Rec mode once the timer has reached the
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