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TW164 
1-to-4 Port Smart Power GNSS Signal Splitter
- Accepts power from all attached receivers
- Automatically switches on power failure of one receiver
- Antenna failure detection/indication
- Rugged military-grade aluminum enclosure
- Amplification to compensate for signal-splitting loss
- Very low noise figure
- IP67-compliant
- Allows up to four GNSS receivers to share a single antenna
- Fits in-line with antenna cable
- Robust package
- Ideal for harsh environments
The Calian TW164 is a professional-grade, full GNSS band signal splitter that connects one antenna to four receivers. It supports the following signals:
- 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
Key Considerations
GNSS is crucial for safety, security, timing, and infrastructure applications, all of which demand high availability. Therefore, resilient, fault-tolerant components are essential to prevent service interruptions.
Innovative Features
First-Generation Design Flaw
Early GNSS signal splitters had a single point of failure: only one attached receiver powered the splitter and the antenna. If this receiver failed or was unplugged, all attached receivers would fail.
Current-Generation Enhancements
The TW164 Smart Power GNSS signal splitter introduces two key features:
- Power Acceptance and Selection:
- Accepts power from all attached GNSS receivers.
- Prioritizes power from Port #1 if its voltage is within the specified range (3.3 V – 12.5 V).
- If Port #1 is disconnected or its power is out of range, the TW164 switches to the next port in numerical order, provided its power and voltage are within the expected range. This switching and port selection is deterministic.
- Antenna Fault Detection:
- If the antenna fails and does not draw current, the TW164 provides the receiver powering the antenna with a current draw lower than 2 mA, indicating an antenna fault.
Performance and Build
The TW164 offers best-in-class performance in terms of noise figure, isolation, and linearity. It is housed in a corrosion-protected, military-grade aluminum (6061-T6) casing, which is robust, compact, and lightweight. The splitter has passed the IP67 water ingress test.
Connectivity Options
The TW164 is available with either TNC or type-N connectors and offers standard gain to compensate for signal-splitting loss.
| Description | Part-Number |
|---|---|
| TW164 | 32-0164-xx |