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The units are battery powered
and are mounted on the streamer sections using industry
standard collars. They can also be mounted on tail buoys.
The XSRS units communicate with the XSRS controllers by
means of the inductive coils and communication circuit with
in the streamers
The design of the XSRS
is based around a proprietary application specific integrated
circuit (ASIC). The ASIC enables the decoding of the digital
acoustic signal using digital signal processing (DSP) techniques.
The unit has four receiver channels and one transmit channel.
Each receiver is capable
of receiving 1 of 60 unique digital signals. The use of
digital acoustic signals and digital processing techniques
enable the XSRS to transmit and receive signals in the same
event. In addition, they are able to transmit and receive
SIPS 1 style tone burst for cross wake ranges.
Where a long battery life
is required, the Type 8005 XSRS provides users with the
option of using 'D' size Alkaline or Lithium cells. The
XSRS units have been designed to be very energy efficient,
with over 80% of the power of the batteries being transmitted
into the water.
Technical Specifications
| Feature |
Alkaline |
Lithium |
| Operating Frequency |
EHF (55-110kHz) |
EHF (55-110kHz) |
| Transmit Source Level (Controllable)
|
Max. 190dB re 1µPa @1m |
Max. 190dB re 1µPa @1m |
| Receive
Sensivity (Controllable) |
73dB re 1µPa @1m |
73dB re 1µPa @1m
|
| Acoustic Range Resolution |
5mm@ 1500 ms Vp |
5mm@ 1500 ms Vp |
| System Sync Resolution |
75mm @ 1500 ms Vp |
75mm @ 1500 ms Vp |
Immunity to Multipath
|
System can resolve bottom
bounce/surface bounce greater than 0.3m |
| Number of Digital Acoustic
Signals |
60 |
60 |
| Number of Tone Acoustic
Signals |
6 |
6 |
| Number of Received Channels |
4 |
4 |
| Battery Life (Typical) |
10-12 Weeks |
28-34 Weeks |
| Weight in Air |
10.4kg |
- |
| Weight in Water |
4.8kg |
- |
Each different
code represents one signal (Equivalent to a frequency
group)
Note:Transceivers can transmit and receive in same event
allowing for multiple observations to be collected faster.
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Features
:-
- Long operating life
- Choice of Alkaline or Lithium battery
packs
- Compatible with HGPS transceiver
- Capable of receiving 16 ranges per cycle
- Designed to transmit to an unlimited
number of units
- Flash upgradeable firmware
- Sealed electronics compartment
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