PNI TCM - Manual (Page 30)

PNI Sensor Corporation DOC#1014688 r06
TCM User Manual – July 2013 Page 25
6.3.4 Output
The TCM module can output heading, pitch, and roll in either degrees or mils. Click
either the or button. The default is . (There are 6400 mils
in a circle, such that 1 degree = 17.7778 mils and 1 mil = 0.05625 degree.)
6.3.5 Enable 3D Model
TCM Studio’s Test tab includes a live-action 3-D rendering of a helicopter. Some
computer systems may not have the graphics capability to render the 3D Model, for this
reason it may be necessary to turn off this feature.
6.3.6 Filter Setting (Taps)
The TCM incorporates a finite impulse response (FIR) filter to effectively provide a more
stable heading reading. The number of taps (or samples) represents the amount of
filtering to be performed. The user should select either 0, 4, 8, 16, or 32 taps, with zero
taps representing no filtering. Note that selecting a larger number of taps can
significantly slow the time for the initial sample reading and, if “Flush Filters” is
selected, the rate at which data is output. The default setting is 32.
6.3.7 Acquisition Settings
Mode
When operating in Continuous Acquisition Mode, the TCM continuously outputs data
to the host system. The rate is set by the Sample Delay. When operating in Poll
Mode, TCM Studio simulates a host system and polls the TCM for a single
measurement; but TCM Studio makes this request at a fixed rate which is set by the
Poll Delay. In both cases data is continuously output, but in Continuous Mode the
TCM controls the data rate while in Poll Mode the TCM Studio program controls the
data rate. Poll Mode is the default.
Poll Delay
The Poll Delay is relevant when Poll Mode is selected. It represents the time delay,
in seconds, between the completion of TCM Studio receiving one set of sampled data
and requesting the next sample set. If the delay is set to 0, then TCM Studio requests
new data as soon as the previous request is fulfilled. Note that the inverse of the Poll
Delay is greater than the sample rate, since the Poll Delay does not include the actual
measurement acquisition time. The default is 0.