GPS TIME TRACKING RECEIVER

MODEL 7651 series (7651A/B) GPS time tracking receiver utilizes artificial satellites with GPS, and outputs a time signal or standard frequency synchronous with the highly accurate atomic clock onboard the satellite, allowing for high speed data transmission, long distance observation control, and synchronization of time and frequency between different locations involved in VLBI etc. In addition it is possible to use the time comparison function to observe hydrogen maser, cesium, rubidium atomic standard clocks etc. Also includes 2 BCD time output systems which when connected with a PC or workstation etc, allow the user to match times.
Application Examples
  • Computer network system time control
  • Timing control for high speed data transmission
  • Power transmission, ocean floor cable trouble observation
  • Standard time at broadcasting stations
  • Frequency standardization for measuring equipment
  • VLBI, Landform observation network time synchronization
  • Standard frequency source for synchronous broadcasting
  • Standard clock time observation

    *Time signals received by GPS are accurately synchronous with UTC (USNO).
Specifications

    "Antenna"
    Receiving Frequency GPS L1 wave 1575.42MHz
    Cable Length 30m (5D-2W) (standard)
    Gain approx. 35dB
    Usage continuousSupplied from
    receiver unit
    Power Supply
    Operating Environment Operating Temperature -25 ~ 70°C
    Storage Temperature -30 ~ 85°C
    Humidity <100%

    "Receiver Unit"
    Synchronous
    Output    		 Standard
    Frequency
    Output    		 10MHz 1Vrms/50Ω BNC
    Synchronous
    Frequency
    Stability    		 ±1x10^-9 7651A
    instantaneous
    ±1x10^-12/Day average
    1 second
    signal output    		 50 pulse TTL Level BNC
    Accuracy within 100rms of GPS time
    SA OFF condition
    (excluding measurement error)
    Location Precision Latitude and
    Longitude    		 within ±30m
    (with SA OFF)
    I/O RS-232C
    9600bps    		 BCD Output
    (Y,M,D,H,M,S)
    Display LCD: 40Character x 2Columns
    Usage Continuous
    Power Supply AC
    100/120/220/240V
    50/60Hz    		 approx. 90VA
    Operating
    Environment    		 Operating
    Temperature    		 0 ~ 40°C
    Storage
    Temperature    		 -20 ~ 60°C
    Humidity <90%
    no condensation
    Dimensions 480(W) x 99(H)x 410(D)mm
    Weight approx. 10kg

    *The 7651Bmodel includes a rubidium oscillator to improve short term stability

    Synchronous Frequency Stability within ±5x10^-11 (7651B instantaneous value)

    *note* GPS systems are controlled and administered by the US Department of Defense.

    Variations in accuracy etc may occur.

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