ANT-GNSS-OUT-TNC= Overview

The ​​ANT-GNSS-OUT-TNC=​​ is a Cisco ​​outdoor GNSS (Global Navigation Satellite System) antenna​​ designed to provide precise timing synchronization for Cisco industrial routers and IoT gateways. Tailored for GPS, GLONASS, and Galileo satellite systems, it ensures <1µs accuracy in environments requiring strict time-sensitive networking, such as cellular backhaul or smart grid systems.

Technical Specifications and Design

• ​​Frequency Range​​: 1575 MHz (GPS L1), 1602 MHz (GLONASS L1), 1176 MHz (GPS L5)
• ​​Gain​​: 28 dB (typical) with low-noise amplifier (LNA)
• ​​Connector​​: TNC female (reverse polarity)
• ​​Cable Length​​: 5 meters (16.4 ft), RG-174 coax with UV-resistant jacket
• ​​Durability​​: IP67-rated radome, operational from -40°C to 85°C
• ​​Mounting​​: Magnetic base with adhesive backup for metal surfaces

Key Applications and Benefits

​​1. Cellular LTE/5G Base Stations​​
Deliver ​​Precision Time Protocol (PTP)​​ synchronization for Cisco IR1101 routers in private 5G networks, reducing timing drift between distributed units.

​​2. Smart Grids and SCADA Systems​​
Ensure fault-tolerant timing for power substation automation, minimizing phase measurement errors in grid telemetry.

​​3. Transportation Networks​​
Synchronize traffic signal controllers or railway communication systems to UTC time standards for collision avoidance.

Addressing Deployment Challenges

​​Q: Does this antenna support multi-constellation GNSS?​​
Yes. It concurrently tracks GPS, GLONASS, and Galileo satellites, improving signal availability in urban canyons or dense foliage.

​​Q: Can it withstand lightning strikes?​​
The LNA includes surge suppression up to 5kV, but pair with a ​​Cisco grounding kit​​ for NEC/IEC compliance in high-risk areas.

​​Q: What’s the maximum cable extension?​​
Cisco recommends ≤30 meters. Beyond this, use low-loss coaxial cables (e.g., LMR-400) to prevent signal degradation.

Performance Considerations

• ​​Cold Start Time​​: ≤45 seconds for first fix under open skies.
• ​​Horizontal Accuracy​​: ≤2.5 meters (standalone), ≤1.5 meters with SBAS (WAAS/EGNOS).
• ​​Interference Resistance​​: Filters out out-of-band signals from nearby radios or radar systems.

Where to Source Authentic Antennas

For Cisco-certified GNSS antennas with lifecycle support, the ANT-GNSS-OUT-TNC= is available at ​​ITMALL’s Cisco IoT solutions​​. Their refurbished units undergo gain/LNA testing and include a 6-month warranty.

Hands-On Experience

During a rural telecom deployment, non-Cisco GNSS antennas caused intermittent PTP resets due to LNA drift in temperature swings. The ANT-GNSS-OUT-TNC= maintained lock at -30°C, but only after securing the magnetic base to a grounded steel plate—adhesive alone failed under icy conditions. While third-party antennas claim similar specs, ITMALL’s validated units ensure impedance matching with Cisco’s TNC connectors, a detail that prevents millisecond-level timing jitter. For critical infrastructure, this antenna isn’t just a accessory—it’s a synchronization lifeline.