Manual

June 2004 Isis® Sonar User's Manual, Volume 2 107
F.2.1 Mechanical Description
The SIU4 output includes up to four analog signal channels with the trigger pulse
superimposed on Channel 1. An adjustable attenuation of 0% to 90% can be applied to
each of the four channels at the SIU4 output.
Table F-1. SIU4 and SIU4-2 specifications
Aspect of the SIU4 Specifications for the Aspect
Mechanical
• Size = 6.0 x 3.6 x 1.7 inches [156 x 91 x 44 mm]
• Weight = 1 pound [454 g]
Connectors
• 4 each Channel Input on isolated BNC
• 1 each Trigger Input on isolated BNC
• 4 each Channel Output on isolated BNC
• 2 each DC Power In/Out on 3.5 mm stereo DIN
Power
• DC plug from Isis chassis supplying
+5 VDC @ 20mA each
Trigger In
• Positive or Negative going
• Duty Cycle < 40%
• Pulse Magnitude > 1.1 V
• 10 milliseconds > Pulse Width > 25
s
• Trigger Holdoff = 10 ms, 25 ms, or 125 ms (jumper
selectable)
• Blinking LED indicates Trigger Detect
Trigger Out
• Embedded in Channel 1
• Positive or Negative (internal jumper) at DC supply voltage
level
• Output Pulse Width = 1.0 ms
• Propagation Delay (Trig In to Ch 1 Out) < 55 ms
Signal In
• Protection against inputs greater than
+6.0 V
Appendix F: Working with Signal Interfaces