Network Equipment : Related Network Equipment Products : Imagine Communications - Videotek® GPS-3903-2

GPS Antenna + Receiver for Time/Date Applications

Model: Videotek® GPS-3903-2

Compatible with the VSG-4CSD clock system driver and VSG4-TCG time code generator
Separate antenna and receiver for mounting flexibility
Used for remotely locking multiple reference systems

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The Videotek® GPS-3903-2 standalone GPS antenna and receiver allows the VSG-4CSD clock system driver and VSG4-TCG time code generator to provide outputs with great accuracy, 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 VSG4-CSD and VSG4-TCG totally independent from telephone or radio receiver standards.

Compatible with the VSG-4CSD clock system driver and VSG4-TCG time code generator
Separate antenna and receiver for mounting flexibility
Used for remotely locking multiple reference systems

Depth: 3.05 in
Height: 2.61 in
Product Weight: 0.38 lbs
Operating Temperature (Maximum): 185 F
Operating Temperature (Minimum): -40 F
Physical Characteristics:
- Enclosure: Off-white plastic
- Connector: TNC
- Mounting: 1”-14 thread or 3/4” pipe thread
Technical Specifications:
- Prime Power: +9 to +32 VDC input
- Power Consumption (nominal): 25 mA, 30 mW, at 12V, +25° C, with antenna
- Back-Up Power: +3.0 to +12 VDC (20 Micro amps @ +3.3V, +25° C)
- Serial Ports (2): RS-232
- I/O Protocol Options
  - TSIP (Trimble Standard Interface Protocol) @ 9600 baud, 8-Odd-1
  - TAIP (Trimble ASCII Interface Protocol) @ 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 nonvolatile memory
Environmental Specifications:
- Storage Temperature: -55° to +100° C
- Vibration
  - 0.008 g2/Hz 5 Hz to 20 Hz
  - 0.05 g2/Hz 20 Hz to 100 Hz
  - 3 bD/octave 100 Hz to 900 Hz
- Operating Humidity: 5% to 95% R.H., non-condensing, @ +60° C
- Altitude: -400 m to +18,000 m
Performance Specifications:
- 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 nanoseconds
- DGPD Accuracy
- Position: 2 m CEP (50%)
- Velocity: 0.05 m/sec (1 sigma)
- Time: ±500 nanoseconds (nominal)
Acquisition
- 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.
Acquisition After Signal Loss: <2 seconds (90%)
Dynamics: Acceleration 4 g (39.2 m/sec2)
Motional Jerk: 20 m/sec2
Operational Limits: Altitude <18,000 m or velocity <515 m/sec, Either limit may be executed but not both

GPS Antenna<:

Environmental Specifications
Storage Temperature: -40° to +100° C
Vibration
- 10–200 Hz Log sweep
- 3 g (Sweep time 30 minutes)
- 3 axes
Shock: 50 g vertical, 30 g all axes
Humidity: Mil-STD-810E
Corrosion: 5% Salt spray
Waterproof: Immersion to 1 meter

Technical//Performance Specifications:

Prime Power: 3.3 Vdc (±10%)
Power Consumption: <20 mA
Output Impedance: 50 ohms
Frequency: 1575.42 MHz ±1.023 MHz
Polarization: Right-hand circular polarization (RHCP)
VSWR: 2.0 maximum
Axial Tatio: 90°: 4.0 dB maximum; 10°: 6 dB maximum
Gain: 30 dBi @ 25° C
Noise: 3.3 dB maximum (25° C ±5°C)
Pass-Band Width: 50 MHz
Out of Band Rejection
- fo=1575.42 MHz
- fo ±20 MHz: 7 dB min
- fo ±30 MHz: 12 dB min
- fo ±50 MHz: 20 dB min
- fo ±100 MHz: 30 dB min
Azimuth Coverage: 360° (omni-directional)
Elevation Coverage: 0° to 90° elevation (hemispherical)
Connection: TNC
Recommended Cable: RG-6 with TNC to TNC connectors, 75 ft maximum length