Guralp Systems CMG-DCM build <10,000 User Manual
Page 105
![background image](/files/788437/content/doc105.png)
Acquisition Modules and Platinum Firmware
Digitiser Configuration
Stream ID
Data content
SCO
Windowed minimum for component
S2O
Windowed minimum for horizontal resultant
S3O
Windowed minimum for 3-dimensional resultant
SCP
Windowed PGA for component
S2P
Windowed PGA for horizontal resultant
S3P
Windowed PGA for 3-dimensional resultant
SCQ
Windowed maximum for component
S2Q
Windowed maximum for horizontal resultant
S3Q
Windowed maximum for 3-dimensional resultant
SCR
Windowed RMS for component
S2R
Windowed RMS for horizontal resultant
S3R
Windowed RMS for 3-dimensional resultant
SCS
Windowed SI for component
S2S
Windowed SI for horizontal resultant
S3S
Windowed SI for 3-dimensional resultant
SCT
Windowed average for component
S2T
Windowed average for horizontal resultant
S3T
Windowed average for 3-dimensional resultant
8.1.1.5 Causal filtering
The normal decimation chain on a CMG-DM24 uses acausal finite impulse
response (FIR) filters. Acausal FIR filters have significantly higher latency
than causal FIR filters. The last filter in a decimation chain has the biggest
effect on the overall latency of the chain. The CMG-DM24 offers a single
causal FIR filter which can be connected at any point in the decimation chain
to provide a lower-latency output.
To enable the causal FIR filter, ensure that the CMG-DM24 is in normal
operation mode (not strong motion mode) and then click
.
Scroll to the bottom of the page and click
.
105
Issue E - February 2014