| Moored Autonomous Hydrophones: System Diagram and Model Comparisons |
 |
||
| This diagram shows the current configuration of the Model 3 autonomous hydrophone. A comparison and listing of the components of the three hydrophone models can be found below. | ||
|
System
Parameter
|
Model
1
|
Model
2
|
Model
3
|
|
|
Data
Logger
|
Supply
Current 1kHz sampling rate @15V
|
18
mA
|
18
ma
|
6.8
ma
|
|
.
|
250 Hz sampling rate @15V
|
-
|
-
|
4.2
ma
|
|
.
|
100 Hz sampling rate @15V
|
6.5
ma
|
6.5
ma
|
3.5
ma
|
|
.
|
Maximum
Sampling Rate
|
2
kHz
|
2
kHz
|
5
kHz
|
|
.
|
Hard
Disk
|
2.5"
1GB
|
2.5"
1GB
|
2.5"
8GB
|
|
.
|
Number
of Hard Disks
|
4
|
4
|
4
|
|
.
|
Maximum
Data Storage
|
4
GB
|
4
GB
|
32
GB
|
|
.
|
Resolution
|
8
or 12-bit
|
8
or 12-bit
|
8
or 12-bit
|
|
.
|
Bytes
per Data
|
1or
2 bytes
|
1
or 2 bytes
|
1
or 2 bytes
|
|
.
|
File
Size
|
2
MB
|
2
MB
|
20
MB
|
|
.
|
File
Format
|
Raw
Data File
|
Raw
Data File
|
DOS
FAT16 compliant
|
|
.
|
Data
Gap between files
|
~25
seconds
|
~25
seconds
|
None
|
|
.
|
Main
Processor
|
Onset
Model 7
|
Onset
Model 7
|
CF1
from Peripheral Issues
|
|
.
|
.
|
.
|
.
|
.
|
|
Clock
|
Supply
current @15 V
|
2.1
ma
|
2.1
ma
|
2.1
ma
|
|
.
|
Stability
(-55 to +85 deg C)
|
3
x 10 E-08
|
3
x 10 E-08
|
3
x 10 E-08
|
|
.
|
Clock
Synchronization
|
GPS
|
GPs
|
GPs
|
|
.
|
Output
|
1
PPS and 100 PPS
|
1
PPS and 100 PPS
|
1
PPS and 100 PPS
|
|
.
|
.
|
.
|
.
|
.
|
|
Pre-Amp
|
Supply
Current
|
2.3
ma @+12V
|
2.3
ma @+12V
|
4
ma @12V
|
|
.
|
Frequency
Range
|
1
to 42 Hz
|
1
to 50 Hz
|
2
to 440 Hz
|
|
.
|
Low-Pass
Cut-off
|
42
Hz
|
50
Hz
|
Programmable
|
|
.
|
Gain
(see gain figure)
|
4
settings
|
4
settings
|
Programmable
|
|
.
|
Pre-whitening
filter
|
4
settings
|
4
settings
|
4
settings
|
|
.
|
Signal
Input
|
Single
|
Single
|
Differential
|
|
.
|
Signal
Output
|
0
to 5V
|
0
to 5V
|
0
to 4V
|