Figure 13-8. The VAX 3400 server 



digital control system, and software are products of the MTS Systems Corpo- 

 ration, Minneapolis, MN. 



The wave board controller is located in a 25-ft (7.6-m) by 75-ft (22.9-m) 

 elevated control room approximately 200 ft (60 m) from the wave board. The 

 computer floor of the control room is approximately 14 ft (4.3 m) above the 

 pavement around the wave channel. The west wall of the control room is 

 approximately 25 ft (7.6 m) from the center line of the wave channel. The 

 control room includes a 240-ft 2 (22-m 2 ) computer room for the VAX server 

 and optical interface, a 1,000-ft 2 (93-m 2 ) room for wave board control and 

 data acquisition, and a 625-ft 2 (58-m 2 ) room shared by principal investigators. 

 Ethernet connections are provided throughout the control room. The roof of 

 the control room is frequently used for video and photographic observations. 

 Exterior and interior photos of the control room appear in Figure 13-9. 



Digital data acquisition system. Analog signals from the wave profilers, 

 electromagnetic current meters, and pore pressure transducers are conditioned 

 to a 0- to 10-V DC dynamic range. Each signal is low-pass filtered through a 



Chapter 13 Wave Generation and Data Collection Systems 



265 



