Lossless GNSS/GPS signal splitter

Built-in amplifiers overcome the effects of signal loss incurred in the splitting process

The Tallysman TW162 and TW163 are professional-grade full GNSS band signal splitters that connect one antenna to two GPS repeater/receivers.

The Tallysman TW164 and TW165 are professional-grade full GNSS band signal splitters that connect one antenna to four GPS repeater/receivers.

Available with TNC or N-Type connectors.

Frequency range 1100 to 1700MHz, supporting:

  • GPS/QZSS-L1/L2/L5
  • QZSS-L6
  • GLONASS-G1/G2/G3
  • BeiDou-B1/B2/B2a/B3
  • Galileo-E1/E5a/E5b/E6
  • NavIC-L5
  • L-band correction services.
Applications

GNSS signal distribution – connect multiple GPS repeaters or receivers to a single antenna

High-availability applications – all ports can provide antenna bias voltage, splitter has no single point of failure

Network and infrastructure timing – provide accurate GNSS/GPS clock signals to multiple network timing devices


  • A standard GNSS/GPS signal splitter suffers insertion loss — a reduction of RF power, expressed in decibels, between a splitter’s input port and each of its output ports.

    Typical insertion losses are:

    • 1:2 splitter -3dB
    • 1:3 splitter -5dB
    • 1:4 splitter -7dB

    The TW162 compensates for the insertion loss experienced by standard GNSS splitters, providing an overall signal gain/loss of 0dB between the input and two outputs.

    The TW163 compensates for the insertion loss and adds 10dB of signal amplification, providing an overall signal gain/loss of 10dB between the input and two outputs.

    The TW164 compensates for the insertion loss experienced by standard GNSS splitters, providing an overall signal gain/loss of 0dB between the input and four outputs.

    The TW165 compensates for the insertion loss and adds 10dB of signal amplification, providing an overall signal gain/loss of 10dB between the input and four outputs.

  • Example of DC power handling using TW165 1:4 splitter.

    TW165 splitter DC voltage handling

    The TW165 passes DC voltage from attached GNSS repeater/receivers through the coaxial cable to the antenna.

    This voltage provides power to the low noise amplifier (LNA) in the antenna.

    It accepts power from all attached receivers and selects power from one of them to power the LNA, using the following protocol:

    Port #1 is given priority if its voltage is within the specified range (3.3 – 12.5 VDC).

    If port #1’s receiver is disconnected, or its output voltage is outside the acceptable range, the TW165 will switch to the next port in numerical order, as long as its power and voltage are within the specified range.

    If the antenna, or its feeder cable, fails and does not draw current, the TW165 will cause all ports #1-4 to draw < 1 mA, indicating an antenna fault.

    • TW162   1-to-2 port Smart Power GNSS Signal Splitter 0dB gain
    • TW163   1-to-2 port Smart Power GNSS Signal Splitter 10dB gain
    • TW164   1-to-4 port Smart Power GNSS Signal Splitter 0dB gain
    • TW165   1-to-4 port Smart Power GNSS Signal Splitter 10dB gain

    All types available with N-Type or TNC connectors.


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Licensing

Licensing of GPS repeaters in the UK.

Licensing of GPS repeaters in Canada.

Licensing of GPS repeaters in the USA.

Roger-GPS: repeater equipment certifications.

If you have any queries please drop us a line.

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Falmouth Road,
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TR10 8BE, United Kingdom.
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