FURUNO

GPS Receiver Chips & Modules

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GPS Receiver Modules GT-84A

GPS Receiver Modules GT-84A

GT-84A is the FURUNO's high sensitivity Time-Transfer GPS Receiver Modules that delivers highly accurate GPS timing.

Integrity is further improved because of its SBAS (WAAS) capability in addition to traditional T-RAIM (Time-Receiver Autonomous Integrity Monitor) function. Several new command sets have been added for easier use.

PPS output mode is available. For example, in "always output mode", 1PPS is output without satellite signals using the receiver's internal timing (no UTC synchronization). In "fixed observation point mode", one satellite signal is enough to output UTC synchronized 1PPS. application is infinite.

  • for Timing
High accurate UTC time can be easily obtained worldwide.
High sensitivity ensures excellent reception in the most demanding applications
Small SMT package reducing the mounting area and mounting cost.
One satellite signal is enough to output UTC syncronized 1PPS.
Antenna current detection circuit allows you to ease maintenance work.

Receiving signal

 L1(1575.42MHz)

Tracking Code

 C/A code

Number of Channel

 32ch

Tracking satellites

 12ch　(1 channel will be added while WAAS enabled)

SBAS

 Available

Position update rate

 1 second

Receiving Sensitivity

 Acquisition (Hot start) : -155 dBm

1PPS accuracy

 8us (max)
30nsec(2σ,open sky)

Supply Voltage

 In case internal LDO is used to supply VCORE
VCC : 3.3V ±0.3V

In case VCORE is supplied from external LDO
VCC : 3.3V ±0.3V , VCORE : 1.2V ± 0.6V

Current Consumption

 In case internal LDO is used to supply VCORE
ICC : 73mA (typical, While acquiring satellites)

In case VCORE is supplied from external LDO
ICC : 29mA , ICORE : 43mA (typical, While acquiring satellites)

Back-up

 Voltage : 1.8 V to 3.6V DC
Current : < 20 micro A (VCC=0V)
: < 2 micro A (VCC=3.3V)

Matching Antenna

 Active Antenna only
Impedance : 50 ohms
NF : < 2 dB
Gain : 15 to 30 dB ( including cable loss )
VSWR : < 2

Antenna detection

 Antenna current detection circuit
over-flow protection circuit

Enviromental Specification

 Operation temperature : -30°C to +85°C
Storage temperature : '-40°C to +85°C
Operation humidity : 95%RH (MAX) (Ta=60°C，No condensation)

Dimensions

 22.0 mm (W) x 22.0 mm (D) x 3.0 mm (H)

Mass

 3 gram

Protocol

 NMEA0183

Specifications subject to change without notice.

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