Graham Field GRAFCO 14423-4 Manuale Utente
14423-INS-LAB-RevD11
40
12 APPENDIX C, OVERALL SENSITIVITY
Overall Sensitivity (2 MHz Probe)
Diameter
of
Target
Reflector
(mm)
Distance
(d)
(mm)
Reflection
Loss A
(d)
Two-way Attenuation B=∑B
a
+B
w
∑B
a
(T:mm B
a
:dB)
B
w
(dB)
B
(dB)
1.58
A=45.7dB
@2 MHz
50
45.7
T
20
4.8 4.0 -
0
57.6
Ba 40
9.6 8.0 -
75
45.7
T
20
4.8 3.4 -
0
56.4
Ba 40
9.6 6.8 -
100
45.7
T
20
4.8 3.4 -
0
56.4
Ba 40
9.6 6.8 -
200
45.7
T
20
4.8 -
-
0
49.6
Ba 40
9.6 -
-
2.38
A=43.2dB
@2 MHz
50
43.2
T
20
4.8 3.4 2.2 0
60.8
Ba 40
9.6 6.8 4.4
75
43.2
T
20
4.8 3.4 1
0
58.4
Ba 40
9.6 6.8 2
100
43.2
T
20
4.8 3.4 -
0
56.4
Ba 40
9.6 6.8 -
200
43.2
T
20
4.8 1
-
0
51.6
Ba 40
9.6 2
-
Doppler
Frequency
(Hz)
333