Harris Corporation :: Broadcast Communications / GPS-3903

GPS-3903
GPS Receiver and Antenna Systems
The NEO® GPS-3903 and standalone GPS receiver/antenna allow the CSD-3902 master
clock driver, the VSG-410 signal generator and MTG-3901 master timing generator to
provide outputs with great accuracy by using the most accurate source of time used in the
public domain — a system of 24 satellites that provides complete coverage in any part of
the world with information on time and position. This makes the CSD-3901/2 and
MTG-3901 totally independent from telephone or radio receiver standards.
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FEATURES
▪ Compatible with NEO CSD-3902 clock system driver and MTG-3901 master timing generator
modules
▪ Separate antenna and receiver for mounting flexibility
▪ Used to remotely locking multiple reference systems
GPS-3903
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IMAGES/DIAGRAMS
Block Diagram
SPECIFICATIONS
Specifications and designs are subject to change without notice.
GPS RECEIVER
Environmental
Operating Temperature
-40° to 185° F (-40° to 85° C)
Storage Temperature
-67° to 212° F (-55° to 100° C)
Vibration
0.008 g2/Hz, 5 to 20 Hz
0.05 g2/Hz, 20 to 100 Hz
3 bD/octave, 100 to 900 Hz
Operating Humidity
5% to 95% R.H., non-condensing, @ 140° F (60° C)
Altitude
-1,312 to 59,005 ft (-400 to 18,000 m)
Technical Prime Power
9 to 32 VDC input
Power Consumption (nominal)
25 mA, 30 mW, at 12 V, 77° F (25° C), with antenna
Back-up Power
3 to 12 VDC (20 µa @ 3.3 V, 77° F (25° C))
Serial Ports
2 RS-232
I/O Protocol Options
Trimble standard interface protocol (TSIP) @ 9600 baud, 8-Odd-1
Trimble ASCII interface protocol (TAIP)) @ 4800 baud, 8-None-1
NMEA 0183 v3.0 @ 4800 baud, 8-None-1
RTCM SC-104 @ 4800 baud, 8-None-1
NMEA Messages
Standard: GGA and VTG
Optional: User-selectable combination of; GGA, GLL, VTG, ZDA, GSV, GSA and
RMC; user can store configuration in non-volatile memory
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Performance
General
L1 frequency, C/A code (SPS), 12-channel continuous tracking receiver
Update Rate
1 Hz (TSIP, NMEA, or TAIP)
Accuracy
Position - Horizontal: <5 m (50%), <8 m (90%)
Position - Altitude: <10 m (50%), <16 m (90%)
Velocity: 0.06 m/sec
1 PPS (static)
±50 ns
DGPD Accuracy
Position: 2 m CEP (50%)
Velocity: 0.05 m/sec (1 sigma)
Time: ±500 ns (nominal)
Acquistion Cold Start
<50 sec (50%) <84 sec 90%
Warm Start
<38 sec (50%) <42 sec 90%
Hot Start
<10 sec (50%) <13 sec 90%
Cold start requires no initialization. Warm start implies last position, time and almanac are saved by back-up power. Hot
start implies ephemeris also saved.
Re-acquistion after signal loss
<2 sec (90%)
Dynamics
Acceleration
4g (39.2 m/sec2)
Motional Jerk
20 m/sec2
Operational Limits
Altitude <59,005 ft (18,000 m) or velocity <515 m/sec Either limit may be executed but not both
Physical Characteristics
Dimensions:
Metal Enclosure ( H X W X D)
1.1 x 4.97 x 4.03 in. (28 x 127 x 102 mm)
Mounting Flange (H X W X D)
1.1 x 6.81 x 4.03 in. (28 x 173 x 102 mm)
Weight
0.57 lbs (0.26 kg) (board + enclosure + flange)
Connectors
Antenna
MCX
Serial Data
2 DB-9
Power
3-pin Conxall
GPS ANTENNA
Environmental
Operating Temperature
-40° to 185° F (-40° to 85° C)
Storage Temperature
-40° to 212° F (-40° to 100° C)
Vibration
10 to 200 Hz log sweep
3 g (sweep time 30 minutes), 3 axes
GPS-3903
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Shock
50 g vertical, 30 g all axes
Humidity
Mil-STD-810E
Corrosion
5% salt spray
Waterproof
Immersion to 3 ft (1 m)
Physical Characteristics
Dimensions (D X H)
3.05 x 2.61 in. (77.5 x 66.2 mm)
Weight
6.0 oz (170 g)
Enclosure
Off-white plastic
Connector
F-type or TNC
Mounting
1 in. -14 thread or 3/4 in. pipe thread
Technical Performance
Prime Power
5 VDC (±10%)
Power Consumption
30 mA maximum
Output Impedance
50 ohms
Frequency
1575.42 MHz ±1.023 MHz
Polarization
Right-hand circular polarization (RHCP)
VSWR
2, maximum
Axial Ratio
90°: 4.0 dB, maximum; 10°: 6 dB, maximum
Gain
35 dB ±3 dB
Noise
3.3 dB, maximum (77° F (25° C) ±41° F (5° C))
Pass-Band Width
50 MHz
Out of Band Rejection
fo = 1575.42 MHz
fo ±20 MHz: 7 dB minimum
fo ±30 MHz: 12 dB minimum
fo ±50 MHz: 20 dB minimum
fo ±100 MHz: 30 dB minimum
Azimuth Coverage
360° (omni-directional)
Elevation Coverage
0° to 90° elevation (hemispherical)
ORDERING INFORMATION
GPS-3903
GPS receiver and antenna, 110 to 240 VAC operation,
includes GPS receiver, antenna, AC power supply, RG-59
antenna cable 75 ft (23 m) and RS-232 adapter cable
OPTIONS
GPS-3902-RM
Rackmount kit, holds up to 2 GPS-3902, GPS-3903
receivers
CAB-CSD-GPS3901
Replacement GPS3902 or GPS-3903 adapter cable for
CSD-3901/2 (included with GPS-3902/3)
PWRSUPPLY-KIT
GPS-3903
Standalone 100 to 240 VAC replacement DC power
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adaptor for GPS-3903, GPS-3902, GPS-3901 (included
with GPS-3901/2/3)
GPS-3903
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