The GPS4000 is a high accuracy GPS time receiver system incorporating anti-jam technology. System PPS accuracy of 50nsec combined with cable delay compensation provides highly accurate system timing precision.
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The GPS4000 is a two-part GPS time receiver system, designed to provide high precision timing to an MC1000 ntp time server. The antenna is designed for external installation on the roof or side of a building. The separate decoder module should be mounted internally and connected to the antenna via the supplied pre-terminated coaxial cable.
In electrically noisy or hostile RF environments, GPS signals can be masked (or jammed) causing degraded timing accuracy, and in some cases, completely preventing system lock. The GPS4000 incorporates advanced anti-jam technology, reducing the effects of interference and providing increased system reliability.
The GPS4000 Time Receiver System provides timing data accurate to within 50nsec of UTC. To ensure the highest possible timing accuracy at the connected master clock, the user programmable cable delay compensation reduces the effects of cable propagation delays.
The system is supplied with a two pair screened cable for connection to the MC Series master clock. The table below lists the available models and standard output cable lengths. If required, this connection may be extended up to a maximum of 150m as detailed in the user manual.
|GPS4000-05:||GPS4000 Time Receiver System supplied with 8m antenna cable and 5m output cable|
|GPS4000-15:||GPS4000 Time Receiver System supplied with 8m antenna cable and 15m output cable|
|GPS4000-50:||GPS4000 Time Receiver System supplied with 8m antenna cable and 50m output cable|
|Typical Performance Specifications:|
|PPS accuracy:||50 nsec RMS|
|GPS Antenna Specifications:|
|Gain:||30 dB @ 25 ºC|
|Noise:||3.3 dB max (25 ºC +/-5 ºC)|
|GPS Module Specifications:|
|GPS engine:||50 channel GPS L1 C/A|
|RF Reception Sensitivity:||-160 dBm (tracking)|
-160 dBm (reacquisition)
-147 dBm (cold start)
-156 dBm (hot start)
|I/O connection:||Single 1000 Series communication port for connection to a MC Series master clock|
|Mechanical & Electrical Specifications:|
|Antenna dimensions:||77.5 x 66.2 mm (3.05” x 2.61”)|
|Decoder module dimensions:||202 x 80 x 55 mm (7.95” x 3.15” x 2.17”) (including removable wall brackets, excluding cable grommet and TNC)|
|Decoder module enclosure:||Light grey polycarbonate body with clear cover.|
|System weight:||1.5 kg (excluding output cable)|
|Antenna cable:||8m (25ft) RG58CU TNC to TNC|
|Output cable:||Two pair plus drain 7x32 (24 AWG) stranded cable with 100% foil shield and semi-rigid, sunlight resistant, Polyvinyl Chloride (PVC) jacket.|
|Operating temperature:||-30 to +50 ºC|
|Relative humidity:||0% - 95%, noncondensing|
|Electrical Safety:||BS EN 60950-1:2006|
|Radio Disturbance:||BS EN 55022:2006|
|Immunity Characteristics:||BS EN 55024:2003|
Listed below are the most up to date documents and files for the GPS4000. Older archived versions are available in the Download section.
(pdf - 328KB)
(pdf - 959KB)
The GPS4000 is designed to provide time synchronisation to compatible timing systems. Listed below are the available products compatible with the GPS4000.
The MC2000 dual lan ntp server provides secure synchronised timing for two independent networks. When synchronised from a GPS or Radio Time Code antenna system, the MC2000 is a twin Stratum 1 NTP primary time server.
The following accessories are available for the GPS4000.
GPS4000-TNC1 - 1m (3ft) RG58CU coaxial TNC to TNC antenna connection cable (in place of standard 8m connection cable).
GPS4000-TNC15 - 15m (50ft) RG58CU coaxial TNC to TNC antenna connection cable (in place of standard 8m connection cable).
GPS4000-TNC25 - 25m (80ft) RG58CU coaxial TNC to TNC antenna connection cable (in place of standard 8m connection cable).
GPS4000-WALL - Stainless steel wall mount bracket (in place of standard surface mount bracket).
GPS4000-SPD - Surge protection device for installations where the antenna is to be installed in a location susceptible to a direct lightning strike.