Installation and specification information for Wharton 488HS3 series satellite time signal receivers
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Glonass receiver for accurate time synconisation
Installation

The connection between the 488HS3-GPS or 488HS3-GLONASS synchronisation system and the 5200 series network time server is by a four core screened twisted pair cable up to 200m long. This cable also provides power to the 488HS3 receiver/decoder module.

The gain pattern of the antenna is designed for full upper hemispherical coverage with the gain diminishing at low elevations. This cross-section is consistent through 360 degrees and so the 3-dimensional gain pattern is a symmetrical spheroid surface.

The 488HS3-GLONASS GLONASS receiver system should be horizontally mounted with a clear view of 75% of the sky. If the sky view is reduced, the interval between ‘switch-on’ and system time synchronisation will be considerably increased.

A post mounting clamp is supplied to enable the antenna to be fixed to a suitable horizontal or vertical post of up to 32mm diameter. The antenna may be mounted on the roof of a building or under a suitable skylight.

The 488HS3 receiver system should be horizontally mounted with a clear view of 75% of the sky. If the sky view is reduced, the interval between ‘switch-on’ and system time synchronisation will be considerably increased.

The receiver system should be horizontally mounted with a clear view of 75% of the sky. If the sky view is reduced, the interval between ‘switch-on’ and system time synchronisation will be considerably increased.

To ensure ease of operation and to remove the possibility of operator error the 488HS3-GLONASS system is designed to self initialise without the necessity of operator data input. On power-up the receiver will automatically begin to search the sky for all available satellites. After three satellites have been acquired a precise date and time will be calculated from the satellite data transmissions.

To ensure ease of operation and to remove the possibility of operator error the system is designed to self initialise without the necessity of operator data input. On power-up the receiver will automatically begin to search the sky for all available satellites. After three satellites have been acquired a precise date and time will be calculated from the satellite data transmissions.

The receiver unit should be horizontally mounted with a clear view of 75% of the sky. If the sky view is reduced, the interval between ‘switch-on’ and system time synchronisation will be considerably increased.

When the 5200 series network time server is synchronised with the GPS or GLONASS receiver/decoder module all transmitted signals are accurate to within +/- 50uS.

Dimensions
488HS satellite time signal receiver dimensions
Environment
  • Operating temperature: -25°C to +45°C (ambient)
  • Relative Humidity: 0% to 95% (non-condensing.)
  • Altitude: 0 to 3,000m
  • MTBF > 50,000 hours
Receiver Architecture
  • 20 channel - capable of simultaneous tracking.
  • Time to first fix - typically less than 1 minute from cold start.
  • Output of verified high accuracy time data - within 10 minutes.
Timing accuracy
  • When fully synchronised the 5000 series NTP Ethernet network time server outputs are within ± 50uS
Electromagnetic Compatibility, Safety and RoHS2 Directives

The Wharton 488HS-GLONASS and 488HS-GLONASS synchronisation receiver systems, when used in accordance with our recommendations, comply with the European Community Electromagnetic Compatibility Directive 2004/108/EC, Low Voltage Directive 2006/95/EC and RoHS2 Directive 2011/65/EU and conform to the following standards:

  • EN 50121-4-2006
  • EN 61000-6-2:2005
  • EN 61000-6-4:2007+A1:2011
  • EN 55022:2010
  • EN 55024:2010
  • EN 60950-1:2006