Introduction

The Trimble® Bullet™ GB timing antennas is designed to receive both GPS and BeiDou signals. It is suitable for markets where BeiDou will be the primary source of GNSS reference. GNSS timing application will benefit from increased signal availability and multi-constellation redundancy. The increased number of visible satellites will significantly improve the performance of the GNSS receiver.

PUT IT ANYWHERE

The antenna is housed in weatherproof packaging designed to withstand exposure to shock, excessive vibration, extreme temperatures, rain, snow and sunlight. The dome is all plastic and the threaded socket in the base of the antenna. The socket accepts either a 1"-14" straight threat (typical marine antenna mount) or a 3/4" pipe thread. The F-type or TNC antenna connector is located inside the threaded socket, which allows the antenna cable to be routed inside a mounting pole and protects the cable connection for added reliability.

STRONG PERFORMANCE

The Bullet GB antenna is an active GPS L1 and BeiDou B1 bands antenna with 26dB gain. The Bullet GB filtering improves impunity to other RF signals for reliable performance in hostile RF jamming environments.

PROVEN RELIABILITY

For over 20 years, Trimble has sold GPS antennas renowned for their survivability in tough environments. The Bullet GB antenna is the fifth generation of the proven Bullet antenna family and offers all the reliability and performance benefits that are required for GNSS installations. In unforgiving environments, an antenna failure could be disastrous. Don't risk it. select a proven GNSS antenna – the Trimble Bullet GB antenna 

RECOMMENDED CABLE & 50/75 OHM ISSUE

Trimble recommends the use of an RG59, 75-ohm cable as a low cost and readily available coaxial cable for the Bullet antenna. Extensive testing by Trimble has shown a minimal attenuation factor of less than 0.5dB (1/2dB) loss using the 75 Ohm cable with a 50 Ohm connector and antenna. The GPS frequency of 1575.42 MHz has negligible attenuation effects between the differences of equipment impedance.

Trimble recommends that the utmost consideration be given to the coaxial cable distance from the Bullet III antenna to the GPS module, including the GPS input receive level, using either 50 or 75-ohm coaxial cable. Using Trimble embedded products, allow for a minimum of 18 dB of gain at the R/F connector input of the GPS and 20 dB of gain at the R/F connector for the ThunderBolt Disciplined Clock. While the Bullet antenna will effectively perform for other vendor-supplied GPS products, the correct input sensitivity level is required for optimum functionality.

MOUNTING

The Bullet GB has a 1”-14 thread and comes with either a TNC or F-TYPE connector.