Installation manual

Introduction
41
851--160117 / B
Make the requisite calculations in table 2, and enter the results of
the 20 logr and the UHydr. into table 3. Alsofill in theM total from
table 1 into table 3.
SL = U Hydr -- M + 20 log r
O
M
N
I
U Hydrophone dB//1V --9.9
OMNI
M total
dB//1V/mPa
--209.6
20 log r dB 17.5
SL OMNI
dB//mPa
217.2
1
1
°
U Hydrophone dB//1V --3.9
11°
M total
dB//1V/mPa
--209.6
20 log r dB 17.5
SL 11°
dB//mPa
223.2
Table 3 Source Level (SL) for OMNI and 11°
Make the SL calculations, and compare the result with the
specifications for the sonar:
SL OMNI: 217 ? 1 dB//mPa
SL 11°: 223 ? 1 dB//mPa
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.
When finished with the measurements, remember to move the
wires in cable pair no. 6 in the Transceiver Unit back to the
following positions:
- Red wire on E201-49 should be moved back to E201-31.
- Blue wire on E201-46 should be moved back to E201-33.
- Cable screen should be connected to E201-35.