© Valeport Limited 2003
MIDAS Surveyor Operating Manual
Page 6
0420805d.doc
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2.3.2
16 CHANNEL GPS
Type
Ashtech DG16 DGPS receiver module.
Differential
SBAS & IALA Marine Beacon
Accuracy
±1.8m (CEP), ±3.8m (95%) with SBAS correction
±0.9m (CEP), ±1.6m (95%) with IALA Beacon correction
(system selects better differential correction value automatically)
Update Rate
1Hz
Antenna
Combined GPS / SBAS / Beacon helical antenna (IP67), 5m cable
2.3.3
OPTIONAL IALA MARINE BEACON RECEIVER
If fitted with the standard 12 Channel GPS receiver, the MIDAS Surveyor may also be optionally supplied with an
external combined IALA Marine Beacon Antenna and Receiver:
Type
CSI SBA-1 IALA Beacon Receiver
Frequency
283.5 – 325kHz
Control
Manual or Automatic (set through MIDAS Surveyor)
2.4
CONNECTORS
11
9
7
5
3
1
2
4
6
8
10
12
1
GPS antenna
2
LF Echosounder transducer
3
HF Echosounder transducer
4
External DC input (Red = Charging, Green = Full)
5
Heave Sensor data Input (RS232)
6
RS232 data output
7
Tide Gauge data input (RS232)
8
External Echosounder data input
9
Sound Velocity data input (RS232)
10
External GPS or external Differential input (RS232)
11
Auxiliary / Gyrocompass data Input (RS232)
12
Remote Fix Marker
The instrument display panel is fitted with 12 LED’s that correspond to the above connectors.
The LED’s will light when valid data (or power) is received / output on the relevant channel.
Note that External GPS/Diff LED (number 10) will also light when SBAS correction is acquired in
the internal GPS receiver.
Note: Dual frequency transducers with a single cable may use either port
11
9
7
5
3
1
2
4
6
8
10
12
