G-Link
®
-LXRS
®
Wireless Accelerometer Node
User Manual
System Operational Overview
18
3.6
Sampling Settings
Sampling settings are accessed through the Configure Node menu. There is a tab for each
sampling mode available for the particular node (
Figure 9 - Sample Settings Menu
).The G-
Link
®
-LXRS
®
has four primary sampling modes: Synchronized Sampling, Low Duty Cycle
Sampling, Streaming, and Datalogging. Some modes have user-configurable settings for
sample rate, sample duration, and datalogging. Other settings are automatic, depending on
number of active channels and other variables. For more information on sampling modes
refer to the Node Commander user manual (
).
NOTE
Streaming mode (which enables continuous sampling and transmitting) uses a
large amount of system bandwidth and can significantly reduce node battery
life. Streaming is recommended primarily for diagnostics and is not supported in
SensorCloud™.
In general, when determining which sample mode and rate is most suitable for the
application, consider the following:
l
Increasing the sample rate or duration reduces the available over- the- air
transmission bandwidth and therefore also reduces the number of nodes that can be
reporting simultaneously.
l
Increasing the sample rate or duration increases the power requirement of the node
and therefore reduces the node's battery life.
l
When measuring vibration or other analog signals, it is important to use a sample rate
at least twice the value of the target measurement frequency. This is the minimum
sample rate required to produce an accurate digital representation of the measured
signal. The higher the sample rate, the more accurate the digital representation.
