User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Coda Basics I - 1
CX1 USER GUIDE - COMPLETE.doc 26/04/04 40/162
Real-time Data Display
There are a number of real-time data display Views. They are opened from the CODA
menu. All Real-time displays are updated at 20Hz.
Real-time Marker Positions (CODA: Display Marker Positions)
This is a text display of marker position (x,y,z) coordinate values. Markers are labelled
by their hardware ID number. The display is updated at 20Hz; coordinates are
displayed only for markers which are in-view.
The maximum number of markers displayed is determined by the current Acquisition
Sampling rate (CODA: Acquisition Setup...). To ensure that all (56) markers are
displayed, set the Sampling rate to 100Hz or less.
If two Codas are connected and configured (Codasys.cfg configuration file and CODA:
Configuration... menu command), the coordinates measured from each unit are
displayed.
Real-time Stick-figure View (CODA: Display Stick-figure)
This is a graphical display of markers joined together according to the current Stick-
figure joining diagram defined in the Setup (Setup: Stick-figure Joining Diagram...).
The viewing direction (axis) and view area are set in the Views: Stick-figure Viewing
options... dialogue. The viewing area coordinates are with respect to the current Origin
(CODA: Define Marker Origin...).
The display is updated at 20Hz.
The maximum number of markers displayed is determined by the current Acquisition
Sampling rate (CODA: Acquisition Setup...). To ensure that all (56) markers are
displayed, set the Sampling rate to 100Hz or less. Only one Real-time Stick-figure may
be displayed.
Real-time Force-plate Data (CODA: Display Force-plate)
This is a text display of the 6 / 8 analogue data channels from a Force plate (not the
calculated Force vector data.)
The values displayed have been offset and scaled by the values stored in the Force-
plate calibration file (specified in the Codasys.cfg configuration file). Thus they should
read close to zero when no force is applied to the Force plate.
Real-time EMG Data (CODA: Display EMG)
This is a text display of up to 32 analogue data channels from an EMG system. The
values displayed have been offset and scaled by the values stored in the EMG
calibration file (specified in the Codasys.cfg configuration file – if applicable).
Valid data is displayed only if EMG Acquisition has been selected in the Acquisition
Setup (CODA: Acquisition Setup...).