Texas Instruments CBL Manual Book page 31

CH11: SONIC
Operation
This parameter lets you select the kind of data to collect on the
ultrasonic motion detector channel. (Default:
0 Clears the channel (refer to last note on page 33)
1
AutoIDENT
defaults to meters.)
2 Meters
3 Feet
Note: The CBL uses 343 meters/second, the speed of sound at a pressure
of 760 millimeters of mercury at 20ºC, for ultrasonic motion
computations.
Post-Processing
This parameter lets you select the type of processing that is performed
after the data has been collected. (Default:
0 None (no processing to be done)
1 d/dt (first derivative, only d/dt indicator is lit on the display
panel)
2 d/dt and d
lit on the display panel)
3 Statistics (mean, standard deviation, minimum, maximum)
Derivatives and statistics are computed on values after the conversion
equation has been applied. When derivatives are requested, Relative
Record Time (
The Statistics option creates four lists: mean, standard deviation,
minimum, and maximum. The original data is not displayed and is
discarded after the statistic summary is computed. (Refer to the example
on page 34.) This option is valid only for lists and matrices. This option is
not valid if period or frequency is selected and will produce an E.13 error
message (page 56).
Note: Post-processing will not operate if the Number of Samples
parameter in Sample and Trigger Setup (
display of collected data). Additionally, only one channel can be active
when Statistics post-processing is selected, or it will produce an E.07
error message (page 56).
(Note: If
AutoIDENT
2 2
/dt (first and second derivative, only d
CMD3 ) is automatically turned on.
1 )
is not active, the operation
0 )
) is L1 (for real-time
CMD3
CBLé System Guidebook
2 2
dt indicator is
31