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The
SEACAL data acquisition system is a deep water, acoustic
data collection system designed primarily for bottom-moored,
subsurface applications. The system digitizes and records
up to 32 hours of acoustic data from as many as 26 externally
located hydrophones, storing the data in digital form
on standard VHS cassette recorders. The system consists
of an electronic chassis, battery pack, mounting frame,
flotation package, and pressure proof housing designed
for 20,000 ft. submergence. The on-board microprocessor
control unit permits continuous or sampled data recording,
and also records digital Date/Time and depth data along
with the acoustic data. Data tapes recorded by the SEACAL
system are played back on a companion playback system.
Additional
Features:
- Individual
programmable gains (0-98 dB)
- 14
bit resolution
- Wide
Dynamic Range (72dB in 1 Hz band)
- 5-1000
Hz bandwidth (26 channels)
- Bandwidths
as high as 4000 Hz possible (8 channels)
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SEACAL
Specification Summary
| Number
of Channels: |
26 |
| Frequency
Response: |
5
Hz to 1 kHz |
| Channel
Gain: |
0-48
dB, 50-98 dB, (6 dB Steps) |
| Chan.-To-Chan.
Gain Match: |
1
dB |
| Chan.-To-Chan.
Phase Match: |
5
Deg |
| Distortion: |
<-60
dB |
| Dynamic
Range (1 Hz band): |
>
72 dB |
| Crosstalk: |
<-50
dB |
| Aliasing
Rejection: |
>
42 dB |
| Digital
bit error rate: |
1
in 10,000,000 |
| Total
Record Time: |
32
Hrs. (T160/SLP) 10.6 Hrs. (T160/SP) |
| Delayed
Start: |
Preset
Day/Hr/Min |
| ON/OFF
Sequencing: |
ON:
1 to 1920 Minutes OFF: 1 to 99,999 Minutes |
| Digital
Time Code: |
DAYS:HR:MIN:SEC
(BCD) embedded With Acoustic Data |
| Depth
Interface: |
4-20
mA Current Loop, Recorded Digitally |
| Power
Supply: |
4,
65 A-hr. "Gel-Cell" Batteries |
| Operating
Temp: |
0
to 40 Deg. C |
| Pressure
Rating: |
10,000
psi |
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Data
Acquisition & Telemetry Systems |
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475 Bridge Street, Suite 100, Groton, CT 06340
• Tel:
860-448-3253 x101• Fax: 860-448-3075
• email:
ccorrado@aphysci.com
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