Installation manual

Simrad SP90
152
851-164510 / Rev.E
Figure 42 Source Level (SL) measurements
TX enable
(CD5873)
TX
enable
External trigger
Vertical input
Oscilloscope
t (ms)
5 to 10 meters
Transducer
Hydrophone
0.5 ms
Up-p
46 49
Transceiver Unit
E201
Test procedure
Observe the following procedure to make the source level
measurements.
1 Connect the hydrophone and TX Enable pulse to the
oscilloscope as shown in the test schematics.
2 Ensure that the distance between the transducer and the
hydrophone is between 5 and 10 meters.
3 Use a weight to keep the hydrophone in a stable vertical
position.
4 Lower the hydrophone and adjust the tilt on the sonar to
get maximum voltage on the oscilloscope at a tilt angle of
0 degrees.
5 Measure the time delay from the negative going TX
Enable pulse to the transmitter pulse on the oscilloscope.