Final tests and measurements
147
851-164336 / D
SL = U Hydr -- M + 20 log r
U Hydrophone
dB//1V
--11.0
OMNI
M total
dB//1V/
µ
Pa
--209.6
20 log r
dB
17.5
SL OMNI
dB//
µ
Pa
216.1
U Hydrophone
dB//1V
--4.9
11
°
M total
dB//1V/
µ
Pa
--209.6
20 log r
dB
17.5
SL 11
°
dB//
µ
Pa
222.2
Table 5 Source level (SL) for Onmi and 11 degrees
16
Fill in the
M total
from the
Test hydrophone data
table into
the
Source Level (SL)
table.
→
The Test Hydrophone Data table is shown as table 3 on
page 144.
17
Perform the SL calculations as detailed in the table, and
compare the result with the specifications for the sonar.
-
SL Omni:
216
±
2 dB//
µ
Pa
-
SL 11 degrees:
222
±
2 dB//
µ
Pa
Measurement termination
The Source Level measurements have now been completed.
Note
DO NOT remove the hydrophone from the position used for the
source level measurements. This known position should also be
used for the receiving voltage response (VR) measurements in the
next chapter.
Summary of Contents for Simrad SP70
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