SA25 - GPS Receiver Interface Adapter

Configuration example 08SA25-00 with front panel

The SA25 provides a GPS receiver interface which supports L1 frequency, C/A code and SPS. An external active or passive antenna can be connected to a rugged SMA connector at the front panel. The received GPS signals are sent to the host via a 5V TTL COM port with a data transfer rate of 4800 baud (configurable).

SA-Adapters are small universal boards providing the line drivers for legacy serial I/O, fieldbus interfaces and other small I/O functions. One serial line is provided per adapter, which can be plugged directly to the CPU board as a mezzanine. Alternatively, the adapter can be connected to the front panel via ribbon cable. The SA concept allows to add additional I/O interfaces to many of duagon's CPU boards, enhancing flexibility with regard to the line transceivers and isolation requirements. Whether a specific SA-Adapter (or a mix of different SA-Adapters) fits on a specific CPU board is determined by a combination of mechanical, performance, FPGA and operating system criteria and needs to be verified for every board configuration requested.

48-channel GPS receiver
GPS according to NMEA 0183
L1 frequency, C/A code, SPS
Rugged SMA connector
Optical isolation
-40 °C to +85 °C

GPS Interface

48-channel GPS (Global Positioning System) receiver based on SiRF IV
GPS Band/Code: L1 frequency, C/A code, SPS
Integrated TCXO, RTC
Accuracy (unaided):
- Position: 2.5 m (CEP50)
- Velocity: 0.01 m/s (50%)
- Time: 1 µs (typ.)
Time To First Fix (TTFF):
- Cold start: 35 s typ.
- Warm start: 35 s typ.
- Hot start: 1 s typ.
Sensitivity:
- Acquisition (cold): -147 dBm
- Re-Acquisition: -162 dBm
- Tracking: -163 dBm
Protocol: NMEA 0183 (configurable to SiRF binary OSP)
One SMA antenna connector at front panel
- For the use of an external active or passive antenna
- Rugged screw connection
- Outside thread
- Inner conductor female

Host Interface

5 V TTL COM port

Data transfer rate configurable (default: 4800 baud 8N1)
Time Mark (TM) output signal provides pulse-per-second (PPS) output pulse signal for timing purposes

Installation

As a piggy-back board directly on a carrier board
Via ribbon cable

Electrical Specifications

Isolation voltage:
- Optical isolation: 2.5 kVAC between isolated side and digital side
Supply voltage/power consumption:
- +5 V (-3%/+5%), 120 mA without antenna, 190 mA with antenna (depends on used antenna)
- Max. supported power consumption for active antenna: +5 V / 70 mA
- Impedance: 50 Ohm

Mechanical Specifications

Dimensions: 32 mm x 42 mm
Weight: 20 g

Environmental Specifications

Temperature range (operation):
- -40..+85°C
- Airflow: min. 1 m/s
Temperature range (storage): -40..+85°C
Relative humidity (operation): max. 95% non-condensing
Relative humidity (storage): max. 95% non-condensing
Altitude: -300 m to +3000 m
Shock: 15 g, 11 ms
Bump: 10 g, 16 ms
Vibration (sinusoidal): 1 g, 10..150 Hz

MTBF

826 041 h @ 40°C according to IEC/TR 62380 (RDF 2000)

Safety

PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers

EMC Conformity

EN 50121-3-2 (table 4, 5, 6) (EMC in rolling stock)
EN 55011 (radio disturbance)
EN 61000-4-2 (ESD)
EN 61000-4-3 (electromagnetic field immunity)
EN 61000-4-4 (burst)
EN 61000-4-5 (surge)
EN 61000-4-6 (immunity to conducted disturbances)

SA25 - GPS Receiver Interface Adapter (Product Discontinued)

Features

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Accessories - SA Adapters

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