2.1 COMPUTER : The computer is the primary component of the APAS. It contains the central processing unit (CPU), the math co-processor, the computer memory and data storage, the graphics processor, the video image processor and the necessary expansion boards required for frame grabbing and data collection. It is the heart of the APAS.
2.2 MONOCHROME MONITOR : The monochrome monitor is the primary screen used with the two monitor APAS desktop configuration. Menus, instructions and information are displayed on this monitor by the computer. This monitor is currently required for the GRABBING Module, however, all other APAS modules can be operated without the monochrome monitor. The advantage of using the two monitor configuration is that the graphic display has greater resolution when the menus are placed on the monochrome monitor.
2.3 COLOR GRAPHIC MONITOR : The color graphic monitor is used by the APAS to display results of analysis such as stick figures, graphs, data smoothing curves and digitized video images. Images from the monitor may be printed on the color graphic printer or copied to a file for subsequent processing and enhancement using the graphics processor module. The one monitor and notebook configurations use the color monitor for a single display. The monochrome and color displays can be toggled by pressing the INSERT key on the keyboard.
2.4 PRINTERS : Two different types of printers are supported by the APAS; the monochrome graphics printer and the color graphics printer. Selected printers can serve both functions.
2.4.1 Monochrome Graphics Printer : The monochrome graphics printer is used for all normal text printing operations, such as, tables and charts. It may also be used to print black and white copies of the color graphic displays from the color monitor.
2.4.2 Color Graphics Printer : The color graphics printer is primarily used to generate hard copies of the color graphic displays. Items copied appear in the same colors as displayed on the monitor. The color printer is usually slower than the monochrome printer and is used when image quality is more important than speed.
2.5 MOUSE : The mouse is used to control the location of both the color graphic cursor, on the color monitor and the pointer, on the monochrome monitor. It is used to make selections from the menus as they appear on the monochrome screen. The mouse is used to locate body joints during the video digitizing process. During subsequent analysis, the mouse is used to enter position information on the graphic display when required by the system. In essence it is the pointer of the APAS.
The mouse has either two or three buttons, in the upper portion of the mouse, that control the three most commonly used options (ENTER, END, AND F10). The mouse configurations are shown below where L is the left mouse button, M is the middle button and R is the right button.
Two Button Mouse Three Button Mouse L = Enter L = Enter R = F10 R = F10 L + R = END M = END L+R = ESC L+M = ? (Help Screen) APAS Only M+R = Ctrl-Print Scrn L+M+R = Insert Template2.6 VIDEO PLAYBACK UNIT : The video unit is used for playback of videotape recordings of performances. Most standard VHS or S-VHS videotape cassettes, recorded from any video source, may be used. It allows high precision freeze-frame video imaging with accurate single frame advance and reverse, as well as, a variable speed search capability.
2.7 VIDEO CAMERAS : The video cameras are commercial or industrial quality portable units that include recorders and rechargeable batteries. They are used to record motion sequences for subsequent analysis. A minimum of two video cameras are required for full three-dimensional analysis.
2.8 CONNECTIONS : A typical APAS system is shown in Figure 2-1. Configuration of particular boards may differ depending on the computer type, however, the connections from the boards to external components should be as described below.
[APAS Connection Diagram] The expansion slots are designated 1 through 6 starting at the right side of the computer (while looking at the back panel). The number of slots varies between 4 and 6 depending on the computer type and thus varies the placement of the boards. The following description is based on the drawing in Figure 2-1 shown above. Connections to the expansion boards remain the same regardless of which slot the board occupies.
The Analog board is shown in Slot 1 and has two identical 15 pin connectors. These external connections are not used with the APAS.
The optional internal modem is shown in Slot 2. There are usually two connections on the modem board. The connector labeled "LINE" or "JACK" should be connected to the phone socket on the wall of the lab. The upper connector is usually labeled "PHONE" and can be used for connecting a handset. Connecting a handset is not required to use the modem.
Slot 3 is left blank in the illustration above.
The monochrome board is shown in Slot 4. This board is required when operating the APAS in the two monitor mode. There are two connectors on this board. The upper (9 pin) connector is used for the monochrome monitor. The lower (25 pin) connector is an extra parallel port (LPT1) and is used to connect the monochrome printer.
Slot 5 is left blank in the illustration above.
The Frame-Grabber board is always in the left-most slot. This happens to be Slot 6 in Figure 2-1. The frame grabber has two connectors that are used. The upper connector (15 pin) connects to a "Y" cable. One side of the "Y" connects to the Color Monitor. The second side of the "Y" connects to the "MONITOR" or "VGA" connector on the back of the computer. The lower connector is used for the 9 pin connector with 3 cables exiting the connector. Only the S-Video cable is used. The other two (BNC and RCA) connections are not used. The S-Video cable from the 9 pin connector mates with the S-Video cable from the VCR. This in turn connects to the S-Video OUT connector on the back panel of the VCR.
Serial port 1 (COM1) is used to connect the mouse.
Parallel port 2 (LPT2) is used for the APAS color graphics printer.
Included in the VCR box, you will find a VCR control cable. One end connects to the "REMOTE" connector on the back panel of the VCR. The other end (25 pin) connects to the P5 connector located in the upper left corner of the back panel on the computer.
The P2 connector on the externally mounted board is used for the first 16 channels of Analog Input. One end of the cable connects to P2 while the other end connects to the 16 channel input box. The P3 connector is used for the 32 channel expansion option. A second 16 channel box is connected to total 32 channels. Be certain that the "keys" are used to plug the cables in correctly. Proper cable connection is indicated by the LED's on the 16 channel box. The LED's should be lit when the computer is powered.