Installation manual

Simrad SD570 / Base version
40
851--160117 / B
Use a weight to keep the hydrophone in a stable vertical position.
Lower the hydrophone and adjust the it to get maximum voltage
on the oscilloscope at a tilt angle of 0°.
Measure the time delay from the negative going TX ENABLE
pulse to the transmitter pulse on the oscilloscope as shown in
figure 14. Enter the result into table 2.
Read the peak-to-peak value of the transmitter pulse U(p-p) and
enter the results of the measurement into table 2.
For the 11° source level measurement, use PINGSECTOR: 11°.
Then use the manual training control to get the maximum
hydrophone voltage.
Remember to enter the bearing angle, tilt angle, depth and water
temperature into general information in table 2.
Measurements/calculations Value Unit Example
Measured time delay (t) msec 5
Distance from
h
y
d
r
o
p
h
o
n
e
t
o
r = 1.5xt meter 7.5
h
y
d
r
o
p
h
o
n
e
t
o
transducer
20 log r dB 17.5
Hydrophone
v
o
l
t
a
g
e
i
n
U(p--p) volt 0.9
v
o
l
t
a
g
e
i
n
OMNI
U(RMS) = U(p--p)/2/Ö2 volt 0.32
O
M
N
I
U Hydr = 20 log
U(RMS)
dB//1V --9.9
Hydrophone
v
o
l
t
a
g
e
U(p--p) volt 1.8
v
o
l
t
a
g
e
i
n
1
1
°
U(RMS) = U(p--p)/2/Ö2 volt 0.64
i
n
1
1
°
U Hydr = 20 log
U(RMS)
dB//1V --3.9
General
i
n
f
o
r
m
a
t
i
o
n
Bearing (° Stb/Port) ° --36
i
n
f
o
r
m
a
t
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o
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Tilt angle ° 0
Depth below keel meter 3
Water temperature °C 18
Table 2 Measurements results