11
G-Link-200-OEM
USER MANUAL
4. Wireless Sensor Configuration
4.1 Hardware Configuration
Node settings are stored to non-volatile memory and may be configured using
SensorConnect. This chapter describes the user-configurable settings.
Figure 11. Node Configuration Menu
Input Range
- Set the accelerometer range to fit the application. Available ranges are
±2.048 g, ±4.096 g, and ±8.192 g for the 8g node or ±10.24 g, ±20.48 g, and ±40.96 g for the
40g node
Low Pass Filter and Group Delay
- The accelerometer provides two filter stages for limiting
bandwidth and maintaining excellent noise performance. The first stage is an analog, fixed
frequency, anti-aliasing filter with -3 dB attenuation at 800 Hz, and 6.18 dB attenuation at 1500
Hz. The second is a user adjustable digital decimation filter. The decimation filter allows low-
pass filtering between 26 Hz to 800 Hz on each channel independently. To minimize aliasing,
it is recommended to set the low pass filter to a frequency ¼ that of the sample rate or less.
Group Delay
- The time delay of the signal amplitude imparted by the low pass filter. See
Talbe 4 for group delay values corresponding to the low pass filter configuration.
Low Pass Filter (Hz) at -3 dB
Group Delay (ms)
800
0.88
418
1.51
209
2.75
104
5.27
52
10.31
26
20.38
Table 4. Group Delay
