Manual

June 2004 Isis® Sonar User's Manual, Volume 2 112
Figure F-1. SIU4-2 test setup diagram
Selecting attenuation switch position 9 on any channel of the SIU4-2 generates a ramp
signal. When this signal is sent through the trigger input, the SIU4-2 generates a trigger
pulse on channel 1 output. The Isis system and software needs this signal to do any
recording.
To test all four channels
1. Set all four attenuation switches to 9 (the highest setting).
2. Connect the trigger and trigger cable as shown above in Figure F-1.
3. Connect the four-channel I/O cable to each of the SIU4-2 output channels and to
the DSP board on the Isis chassis. Use either of the inputs on the DSP board
labeled
DSP1 or DSP2.
4. In the Isis software, put the system in Record mode.
Appendix F: Working with Signal Interfaces