WSDA
®
-Base-104
®
USB Base Station
User Manual
Gateway Communication and Settings
37
Figure 30 - Synchronized Sampling Beacon
4.9.1
System Bandwidth in Synchronized Sampling
When using synchronized sampling all nodes in the wireless network are queried and given
time slots of various lengths based on their configuration (# of channels, sample rate, etc.).
Nodes will only transmit data during these time slots, therefore eliminating over-the-air data
collisions. The total time available for node transmissions is defined by the system
bandwidth. Because the system bandwidth is finite, only a fixed number of nodes can be
supported when using synchronized sampling. The number of nodes is largely dependent
on node configuration, as each consumes part of the bandwidth. Use the online network
bandwidth calculator to determine the bandwidth capacity for a particular system
configuration:
http://www.microstrain.com/configure-your-system
4.9.2
Synchronized Sampling with Multiple Gateways
If synchronization is desired between gateways, it is recommended that a WSDA
®
-1500 -
LXRS
®
gateway be used because they can be configured to reference external time
sources and therefore get periodic same time updates. WSDA
®
- Base - 10
x
-LXRS
®
gateways do not have this feature and instead rely on the internal clock (which can vary
between gateways). For more information refer to the WSDA
®
-1500 - LXRS
®
User
Manual.
4.10
Node Configuration and Other Settings
Node configuration is completed exclusively in Node Commander
®
. For an overview of sensor
configuration and menus
see Connect to Nodes on page 14
.
For additional node configuration and gateway settings not discussed in this manual, refer to
the Node Commander
®
user manual (
see Reference Information on page 57
).
