Frequently Asked Questions

The mosaic-X5 platform targets professional survey, infrastructure, and high-reliability applications. It includes Septentrio’s OSNMA anti-spoofing verification, SLAS (Sub-meter Level Augmentation Service), and AIM+ interference mitigation — making it ideal for environments with RF interference risk.

The UM980/UM982 platform is designed for volume RTK applications such as agricultural machinery, UAV base stations, and smart city infrastructure. It delivers centimetre-level RTK accuracy at a lower cost per unit with dual-antenna heading support on the UM982.

All Eview multi-band receivers track signals from GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC (model dependent). Frequency bands include L1, L2, and L5 on GPS; B1, B2, B3 on BeiDou; E1, E5a, E5b on Galileo; and L1/L2 on GLONASS. Tracking all constellations and bands simultaneously maximises satellite availability and improves accuracy, especially in urban canyons, forests, and open-sky environments.

Yes. All Eview receivers output standard NMEA 0183 messages including GGA, RMC, GSA, GSV, VTG, HDT, and others. NMEA output rate, message selection, and port configuration are all user-adjustable via command or configuration software. Most receivers also support RTCM 3.x input and output for RTK corrections and raw data logging.

Yes. Most Eview RTK receivers support both base and rover modes. In base mode, the unit transmits RTCM correction data via serial, USB, or (where fitted) an internal radio or network module. In rover mode, it receives corrections and computes a centimetre-level RTK position. Mode switching is done via command or configuration software.

Contact us at tina.ng@gnss-solutions.com with the product model, quantity, and your shipping address. We will provide a formal quotation with lead time and payment terms. For volume OEM orders or system integrator pricing, please mention your application and estimated annual volumes.

Standard stocked items typically ship within 3–5 business days. Custom configurations or larger volume orders may require 2–4 weeks lead time. We will confirm the lead time on your quotation. For time-critical projects, contact us early and we will advise on availability.

Yes, Eview GNSS Technology Ltd ships worldwide. We use DHL, FedEx, and UPS for international shipments and provide full export documentation including commercial invoice, packing list, and certificate of origin where required. All products comply with applicable export control regulations — please note that Eview products are for civilian commercial use only.

Eview GNSS products are classified as commercial dual-use technology and may be subject to export control regulations in certain jurisdictions. We comply with all applicable regulations and may request end-user information before shipment to restricted destinations. All products are intended for civilian commercial applications only. See our Export Control Policy for details.

We accept bank transfer (T/T), PayPal, and credit card for smaller orders. For established accounts, 30-day net payment terms may be available. All invoices are issued in USD. Contact us for payment details after receiving your quotation.

Eview receivers appear as a USB-to-Serial COM port on Windows. Most use a CP210x USB-UART chip (Silicon Labs driver) or an FTDI chip. Open Device Manager and look under Ports (COM & LPT). If a yellow warning icon appears, download the CP210x driver from Silicon Labs. macOS and Linux detect these automatically. See our Getting Started guide for step-by-step instructions.

For mosaic-X5 / mosaic-H based receivers: use Septentrio RxTools, which provides a full GUI for signal monitoring, configuration, and data logging. For UM980 / UM982 based receivers: use UNICORE Message Analyst (UMA). Any serial terminal (PuTTY, CoolTerm, TeraTerm) also works at 115200 baud for command-line configuration.

The default baud rate for all Eview receivers is 115200 bps, 8 data bits, no parity, 1 stop bit (8N1). No hardware flow control is required. You can change the baud rate via configuration command if needed for your application.

Septentrio mosaic-based receivers include a built-in web interface accessible at 192.168.3.1 when connected via USB (the receiver appears as a USB Ethernet adapter). This provides real-time signal displays, configuration pages, and a data download interface without installing any software. UM980/UM982 receivers do not have a built-in web interface and require UMA or a serial terminal.

Firmware updates are provided as part of your warranty. For mosaic-based receivers, firmware can be uploaded via the web interface or RxTools. For UM980/UM982 receivers, firmware is updated using the Unicore upgrade tool via serial connection. Contact tina.ng@gnss-solutions.com to request the latest firmware file for your model.

Real-Time Kinematic (RTK) is a technique that uses carrier-phase GNSS measurements and real-time correction data to achieve centimetre-level positioning accuracy. A base station at a known location sends RTCM correction data to your rover receiver. The rover applies these corrections to resolve integer carrier-phase ambiguities, yielding an “RTK Fixed” position with typical accuracy of 1–2 cm horizontal. See our RTK Positioning page for a detailed explanation.

Not necessarily. You can receive corrections via NTRIP (Networked Transport of RTCM via Internet Protocol) from a public or commercial correction network — many countries have free CORS (Continuously Operating Reference Station) networks. Alternatively, you can set up your own base station using a second Eview receiver at a known survey point. For the best accuracy, keep the baseline distance between base and rover under 30 km.

In good conditions (open sky, strong corrections signal, short baseline), RTK initialisation typically takes 10–60 seconds. Multi-frequency receivers initialise faster than single-frequency units because L2/L5 signals help resolve ambiguities more quickly. If your receiver stays in “RTK Float” for more than a few minutes, check your corrections data stream, sky view, and baseline distance.

This depends on your country. In Australia, Geoscience Australia’s CORS provides free corrections. In Europe, national geodetic agencies (such as OS Net in the UK, SAPOS in Germany) offer NTRIP services. Commercial networks like Trimble RTX, Leica SmartNet, or Hexagon provide global coverage. Contact us and we can advise on the best correction source for your region.

• Single-point (no corrections): 1–3 m horizontal
• SBAS (WAAS/EGNOS): 0.5–1 m horizontal
• DGPS / RTCM corrections: 0.3–0.5 m horizontal
• RTK Float: 0.1–0.5 m horizontal
• RTK Fixed: 1–2 cm horizontal, 2–3 cm vertical

Actual accuracy depends on sky view, multipath conditions, baseline length, and correction quality.

Eview GNSS receivers and OEM boards carry a 2-year hardware warranty from the date of purchase. Antennas and cables are covered for 1 year. Firmware updates are free for the lifetime of the hardware. See our Warranty & RMA page for full terms and what is and isn’t covered.

Email tina.ng@gnss-solutions.com with your order number, unit serial number, and a description of the fault. We will review your request within 1–2 business days and issue an RMA number with return instructions. Do not ship any unit without a confirmed RMA number — unidentified returns cannot be accepted.

For warranty claims, the customer is responsible for outbound shipping to Eview. Eview covers return shipping for units confirmed as faulty under warranty. For out-of-warranty repairs, the customer covers shipping in both directions. We recommend using a trackable courier service (DHL, FedEx, UPS) and declaring the shipment as “Defective goods returned for warranty repair.”

Yes. We offer paid out-of-warranty repair services for most products. Follow the same RMA process — once we evaluate the unit we will provide a written quote before any work begins. You are under no obligation to proceed. See our out-of-warranty section for details.

Depending on the model, Eview receivers support a combination of: USB (appears as virtual COM port), RS-232 serial (DB9 or bare wire), TTL UART (3.3 V on OEM boards), Ethernet (on mosaic-based box units), and Bluetooth/Wi-Fi (on selected models with radio modules). Check the datasheet for your specific model.

Box receivers typically accept 7–36 V DC via a power connector and can also be powered via USB (5 V). OEM boards operate at 3.3 V or 5 V depending on the module. Always check the datasheet for your specific model and never exceed the maximum rated voltage. Reverse polarity protection is fitted on most box units but not on bare OEM boards.

Yes. All Eview receivers provide a 1 Pulse Per Second (1PPS) signal output, synchronised to GNSS time. The 1PPS signal is available on a dedicated pin (TTL level, configurable pulse width). Timing accuracy is typically better than 20 nanoseconds RMS relative to UTC. This is used for network time synchronisation (PTP/IEEE 1588), telecom base station timing, and industrial control applications.

GNSS receivers require line-of-sight to satellites and will not work in fully enclosed indoor environments. In areas with partial sky view (under a roof edge, near a window), performance is degraded. For indoor positioning or tunnel applications, Eview can discuss inertial integration or GNSS/INS hybrid solutions that maintain position during GNSS outages. Contact us to discuss your specific application.

IP rating varies by model. Survey-grade enclosures are typically rated IP67 (dust-tight, waterproof to 1 m). Industrial enclosures may be IP65 or IP66. OEM boards have no inherent IP rating and must be mounted in a suitable housing. Always refer to the product datasheet for the exact rating. If you need a specific IP rating for your application, contact us and we can advise on the appropriate model or enclosure option.