CHCNAV X12 GNSS Receiver User Manual

1. Introduction

The CHCNAV X12 GNSS Receiver is a high-precision surveying and mapping instrument designed for various applications including land survey, construction, marine, and UAV operations. This manual provides essential information for the setup, operation, maintenance, and troubleshooting of your X12 GNSS Receiver.

CHCNAV X12 GNSS Receiver front view with display — Figure 1: Front view of the CHCNAV X12 GNSS Receiver, showing the OLED display and control buttons.

2. Specifications

The CHCNAV X12 GNSS Receiver boasts robust specifications for accurate and reliable performance in demanding environments.

Category	Feature	Detail
GNSS Performance	Channels	624 channels
	GPS	LI C/A, L2C, L2P, L5
	GLONASS	L1 L2
	BeiDou	B1, B2, B3
	SBAS	L1
	QZSS	L1, L2, L5
GNSS Accuracies	Real-time kinematics (RTK)	Horizontal: 8 mm + 1 ppm RMS, Vertical: 15 mm + 1 ppm RMS Initialization time: < 10s, Initialization reliability: > 99.9%
	Post-processing kinematics (PPK)	Horizontal: 2.5 mm + 1 ppm RMS, Vertical: 5 mm + 1 ppm RMS
	Post-processing static	Horizontal: 2.5 mm + 0.5 ppm RMS, Vertical: 5 mm + 0.5 ppm RMS
	Code differential	Horizontal: 0.25 m RMS
	Autonomous	Horizontal: 1.5 m RMS, Vertical: 3 m RMS
	Positioning rate	Up to 10 Hz
	Time to first fix	Cold start: < 45 s, Hot start: < 10 s, Signal re-acquisition: < 1 s
	RTK tilt-compensated	Additional horizontal pole-tilt uncertainty typically less than 10 mm + 0.7 mm/* tilt
Hardware	Size (L x W x H)	159 mm x 150 mm x 110 mm (6.3 in x 5.9 in x 4.3 in)
	Weight	1.26 kg (2.77 lb)
	Environment	Operating: -40 °C to +65 °C (-40 °F to +149 °F) Storage: -40 °C to +85 °C (-40 °F to +185 °F)
	Humidity	100%
	Ingress protection	IP67 waterproof and dustproof, protected from temporary immersion to depth of 1 m
	Shock	Survive a 2-meter pole drop
	Tilt sensor	Calibration-free IMU for pole-tilt compensation. Immune to magnetic disturbances. EBubble leveling
	Front panel	4 LED indicators, 1.46" OLED Display
Certifications	FCC part 15 (class B device), FCC part 22, 24, 90, CE mark. NGS Antenna calibration.
Communication	Network modem	Integrated 4G modem LTE (FDD): B1, B2, B3, B4, B5, B7, B8, B20 DC-HSPA+/HSPA+/HSPA/UMTS: B1, B2, B5, B8 EDGE/GPRS/GSM: 850/900/1800/1900 MHz
	Wi-Fi	802.11 b/g/n, access point mode
	Bluetooth	v4.1
	Ports	1 x 7-pin LEMO port (external power, RS-232) 1 x USB Type-C port (data download, firmware update) 1 x UHF antenna port (TNC female)
	UHF radio	Standard Internal Rx/Tx: 410 MHz to 470 MHz Transmit Power: 0.5 W to 2 W Protocol: CHC, Transparent, 9600 bps to 19200 bps Range: Typical 3 km to 5 km
	Data formats	RTCM 2.x, RTCM 3.x, CMR input and output HCN, HRC, RINEX 2.11, 3.02 NMEA 0183 output, NTRIP Client, NTRIP Caster
	Data storage	32GB internal memory
Electrical	Power consumption	5 W (depending on user settings)
	Li-ion battery capacity	2 x 3400 mAh, 7.4 V
	Operating time on internal battery	UHF receive/transmit (0.5 W): 6 h to 9 h Cellular receive only: up to 9 h Static: up to 10 h
	External Power input	9 V DC to 28 V DC

3. Setup

This section outlines the basic steps for setting up your CHCNAV X12 GNSS Receiver for operation.

3.1 Unpacking and Inspection

Upon receiving your X12 GNSS Receiver, carefully unpack all components and inspect them for any signs of damage. Refer to the packing list to ensure all items are present.

Open carrying case displaying the CHCNAV X12 GNSS Receiver and accessories — Figure 2: The CHCNAV X12 GNSS Receiver and its accessories neatly organized in the carrying case.

3.2 Battery Installation and Charging

The X12 receiver uses two 3400 mAh, 7.4 V Li-ion batteries. Ensure batteries are fully charged before use. The battery compartments are located on the side of the receiver.

Side view of the CHCNAV X12 GNSS Receiver showing battery compartments — Figure 3: Side view of the receiver, illustrating the battery compartment access.

3.3 Mounting the Receiver

Mount the X12 receiver securely onto a survey pole or tripod. Ensure the mounting is stable to achieve optimal accuracy.

CHCNAV X12 GNSS Receiver mounted on a pole with a handheld controller — Figure 4: The CHCNAV X12 GNSS Receiver set up on a survey pole with a connected handheld controller.

3.4 Connecting to Controller and Software

Connect the receiver to your handheld controller via Bluetooth or other available ports. The recommended software for operation is Landstar 7. Ensure the software is installed and configured correctly on your controller.

CHCNAV X12 GNSS Receiver with controller and tripods in a full setup — Figure 5: A complete surveying setup including the CHCNAV X12 receiver, controller, and tripods.

4. Operation

This section covers the general operation of the CHCNAV X12 GNSS Receiver.

4.1 Powering On/Off

Press and hold the power button on the front panel to turn the device on or off. The 1.46" OLED display will show status information, and four LED indicators provide quick visual feedback.

Close-up of the CHCNAV X12 GNSS Receiver's OLED display — Figure 6: Close-up view of the X12's OLED display, showing operational status icons.

4.2 GNSS Signal Acquisition

Once powered on, the receiver will automatically begin acquiring GNSS signals (GPS, GLONASS, BeiDou, SBAS, QZSS). A cold start typically takes less than 45 seconds, while a hot start takes less than 10 seconds. Signal re-acquisition is nearly instantaneous, under 1 second.

4.3 RTK and Tilt Compensation

The X12 supports Real-Time Kinematics (RTK) for high-precision measurements. It features a calibration-free IMU (Inertial Measurement Unit) for pole-tilt compensation, allowing for accurate measurements even when the pole is not perfectly vertical. This tilt compensation is immune to magnetic disturbances and supports up to a 60-degree tilt.

Diagram illustrating the 60-degree tilt compensation of the CHC IMU I90 — Figure 7: Diagram showing the 60-degree tilt compensation capability of the integrated IMU.

4.4 Data Logging and Communication

The receiver has 32GB of internal memory for data storage. Data can be downloaded via the USB Type-C port. Communication options include integrated 4G modem, Wi-Fi (802.11 b/g/n), and Bluetooth v4.1. The internal UHF radio allows for RTK corrections over a range of 3-5 km.

5. Maintenance

Proper maintenance ensures the longevity and optimal performance of your CHCNAV X12 GNSS Receiver.

5.1 Cleaning

Regularly clean the exterior of the receiver with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could damage the casing or display. Ensure all ports are free from dust and debris.

5.2 Storage

When not in use, store the receiver in its protective carrying case in a dry, temperate environment. Ensure batteries are partially charged (around 50%) for long-term storage to preserve battery health.

5.3 Battery Care

Always use the specified Li-ion batteries and charger.
Avoid fully discharging the batteries frequently.
Do not expose batteries to extreme temperatures.

5.4 Environmental Protection

The X12 receiver is IP67 rated, meaning it is waterproof and dustproof, protected from temporary immersion to a depth of 1 meter. While robust, avoid unnecessary exposure to extreme conditions or prolonged submersion.

6. Troubleshooting

This section provides solutions to common issues you might encounter with your CHCNAV X12 GNSS Receiver.

6.1 No Power

Ensure batteries are correctly installed and fully charged.
Check external power connection if using an external source (9 V DC to 28 V DC).

6.2 No GNSS Signal Acquisition

Ensure the receiver has a clear view of the sky, free from obstructions.
Verify that the receiver's antenna is not obstructed or damaged.
Check the OLED display for any error messages or status indicators.

6.3 Communication Issues (Bluetooth/Wi-Fi/UHF)

For Bluetooth, ensure the controller is within range and paired correctly.
For Wi-Fi, verify network settings and ensure the receiver is in access point mode if needed.
For UHF radio, check frequency settings, protocol (CHC, Transparent), and ensure the antenna is properly connected.

6.4 Inaccurate Measurements

Ensure the receiver is properly initialized (RTK initialization time < 10s).
Verify that the tilt compensation is active and functioning correctly, especially if working on uneven terrain.
Check for any local interference that might affect GNSS signals.

7. User Tips

While specific user feedback is not available, here are some general tips for optimizing your experience with the CHCNAV X12 GNSS Receiver:

Always keep the Landstar 7 software updated to the latest version for best performance and new features.
Utilize the 32GB internal memory for extensive data logging, and regularly back up your data.
Familiarize yourself with the OLED display indicators for quick status checks during fieldwork.

8. Warranty and Support

8.1 Warranty Information

A 12-month warranty is offered for the CHCNAV X12 GNSS Receiver, effective from the date of receipt. For survey accessories, a 6-month warranty is provided.

8.2 Repair Services

In-Warranty Repair: We are responsible for supplying new parts for repair. Round-trip freight costs will be covered by us. If necessary, the product may be required to be sent back to our service center for repair, with freight costs covered by us. For special cases, an engineer may repair on-site.
Out-of-Warranty Repair: Related parts will be offered at commercial cost. Freight costs will be shared.

8.3 Training and Calibration

Our engineers are qualified to provide on-site training and calibration for GNSS and Total Station equipment. This service is available for bulk orders upon customer request.

8.4 Technical Support

Technical support is available 24 hours a day, 7 days a week (24/365).

9. Contact Information

For any questions or technical assistance, please contact us:

WhatsApp: +86 13786139874

CHCNAV X12 GNSS RTK