Nexus 2 Lite, 2696
Easytrak Nexus 2 Lite is an advanced USBL positioning and tracking system that determines the position of dynamic subsea targets through the transmission and reception of acoustic signals between the submerged transceiver and a target beacon.
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Key Features
- Accurate and stable
- Easy and intuitive to operate
- Software options include geo-referenced graphical overlay
- High performance, cost-effective
Applications
- Underwater survey and inspection
- Subsea construction sites
- Cable and pipeline route surveys
- Hydro-graphical and geotechnical surveys
- Nearshore construction and salvage
Technical Specification
EASYTRAK NEXUS 2 LITE CONSOLE, MODEL EZT-2696
Provides DC power, high speed digital communications to the transceiver with a USB interface to user PC running Easytrak Nexus 2 Lite software.
Dimensions
1U, 254 x 54 x 260mm
Weight
1.0kg
Power requirements
48Vdc / Vac Adapter Input: 90Vac – 230Vac 47-63Hz typically 3A
Connection to Transceiver
Rear panel connector for EZT-2686N Transceiver
Temperature
Operating: -10° to +40°C
Storage: -20° to +50°C
Front panel indicators
LED indicators for power and serial status.
Serial communications
4 x Console RS-232 Data Ports. System utilises PC ports if available
Data Output
aae format V1 and V2, TP-II2EC, TP-EC W/PR, Simrad 300P, Simrad 309,
Simrad $PSIMSSB, Pseudo $GPRMC, NMEA $GPGGA, NMEA $GPVTG, NMEA
$GPTLL, Pseudo $GPGGA, KLEIN 3000 (Quick set) Multiple outputs available
Compass Input
SGB-HTDS, SGB-HTDt, NMEA HDT,HDM, HDG
VRU Input
TCM-2.X, $HCXDR , TSS1
Calibration
Optional EasyCal 2 USBL Calibration tool
GPS / DGPS Input
NMEA; GLL, GGA, RMC
Optional Geo Referenced Graphical Overlay. GeoTiff, DXF
Target Heading Input
NMEA HDM, HDT, HDG, PNI TCM2
Target Depth Input
NMEA DBT, DBK, DBS, DPT, AAE
Time in
GPS Time synch
Responder Output
Positive 12V pulse 5ms long
Audio
Audible activity indicator
EASYTRAK TRANSCEIVER, TYPE EZT-2686N
Factory calibrated multi-element transceiver head complete with integral AHRS, depth sensor and
temperature sensor.
EZT-2686N
Material
316 Stainless Steel
Weight in air/water
16kg/11kg
Dimensions
152mm x 432mm (Ø x L)
Temperature
Operating: -10° to +40°C
Storage: -20° to +50°C
Depth rating
30m
Electrical supply
48Vdc
Temperature sensor
1° resolution between -10° and +40° C
Cable
30m standard (20-150m options) with connectors. 12.8mm Ø
Accuracy / performance
Accuracy is based on the correct speed of sound being entered, no ray bending and an acceptable S/N ratio
Position accuracy
0.45% of slant range with external sensors, 1.49% of slant range with internal AHRS
Acoustic accuracy excluding heading correction errors
Range resolution
Calculated to 0.1m resolution
Frequency band (MF)
18 – 32 kHz
Tracking beam pattern
Hemispherical, 180°
Transmitter
Variable, typical max 192dB re 1μPa at 1m
Integrated AHRS:
Bearing resolution: 0.1° displayed. Internally calculated to 0.01°
Heading sensor accuracy: 0.5° rms standard; +/- 0.1° resolution/repeatability
Pitch/Roll sensor accuracy: +/- 0.20° rms +/- 0.1° resolution/repeatability
Beacon types
aae Sigma 1, Sigma 2 Digital Spread Spectrum and aae Tone channels. aae V-NAV channels. HPR 400 channels. 1100, 1000, 1200A, 1300A Series beacons, Digital Depth Transponders, aae Release and Telemetry beacons
Interrogation rate
>2Hz refresh rate. Internally set or external key
System
Externally assessed for immunity and emissions; conforms to
89/336/EEC. RoHS compliant
aae technologies
