Hardware Products - GEOLINK

Geolink - Global Positioning SystemGEOLINK is a 12 channel portable Differential Global Positioning System suitable for land, sea and airborne applications. GEOLINK uses V.H.F. / U.H.F. / MF Beacon and Cellular Radio Telemetry.

Major features of GEOLINK include:

  • Differential GPS Telemetry
  • Hydrographic and Seismic Real Time
  • Kinematic Land survey applications
  • Real Time Dynamic Differential
  • Positioning 12 Channel Differential Mil Spec.
  • DGPS Receiver Sensors Fully Portable

Differential GPS Data Telemetry System Description

HYDL100S Shore DGPS Reference Transceiver

  • Heavy duty ruggedized molded watertight Yellow ABS enclosure with external ON/OFF switch, BNC Antenna
  • 12 VDC power cord and CANON DB9, 9-pin serial RS232
  • Data terminal connector
  • 144-172 420-470 MHz VHF/UHF FM and Cellular radio transceiver
  • Packet protocol radio modem MDLC
  • 0 dB Short/medium range flexible ruggedized antenna
  • 3.75 dB high gain optional antenna
  • 12 Channel DGPS Receiver

HYDL100M Portable DGPS Receiver

  • Rugged yellow ABS enclosures, BNC, UHF, or 'N' Antenna connector
  • 12-32 VDC power cable and connector with ON/OFF switch
  • CANNON DB9, 9-pin RS232C serial data port connector
  • 144-172 Mhz 430-470 MHz VHF/UHF FM and Cellular radio transceiver
  • Packet protocol radio modem MDLC
  • 10-32 VDC power supply, reverse polarity protected
  • 0 dB Ruggedized Rubber Antenna
  • 12 Channel DGPS Receiver Sensor

Specifications

Radio Transceivers  
Frequency range VHF 144-172 MHz UHF 430-470 MHz
Supply voltage 13.8 VDC + 10%, neg. ground
Supply current 2A @ 1W
Receive 500 ma; Stab 300mA
Operating temp. range -20 to +60 Deg C
Frequency Accuracy +10 ppm (-20 to +60 deg C)
Sensitivity better than 0.25uV (for 12 dB SINAD)
Image ratio better than 65 dB
Selectivity(-6/60dB) 12/30 kHz
Audio output at least 1.5 W into 8 ohms (for 5% THD)
RF output power (50.ohms) 1 watt, options to 45 watts
Spurious emissions at least 60 dB below carrier

 

 

 

 

 

 




MDLC  
Modulator/Demodulator AMD 7910 'World Chip' modem
Data format Serial, Asynchronous
Modem tones Bell 103 and Bell 202
Modulation method Binary Phase-coherent NRZI FSK
Frequency accuracy Bell 202 (mark) + 1Hz
all others (mark) + 0.4 Hz
Harmonics 45 dB below fundamental, single tone
Demodulation method Differential FM detection
Output level 5 to 100 mv RMS
adjustable by internal control
CPU ZILOG Z-80 microprocessor
RAM 32 K
ROM 48 K program ROM
Hardware HDLC Zilog 8530 SCC
Terminal Interface Standard RS232C 25 pin DB25 connector
Input/output lines RS232C (CCITT V.24/V.28) with full handshake (hardware and software)
Terminal data rates Audo baud selection of: 300,1200,2400,4800,9600 BPS TBAUD adds: 45,50,57,75,100,110,150,200,600,19200
Radio Baud Rates Includes: 300,1200-9600 BPS

 

 

 

 

 

 

 

 

 

 

 

*specifications subject to change without notice