33-3870-01-11

A Tallysman Accutenna® TW3870 / TW3872 GPS L1/L2 + GLONASS G1/G2 + BeiDou B1 + Galileo E1 The TW3870/ TW3872 employ Tallysman’s unique Accutenna technology providing dual band GPS L1/L2, GLONASS G1/G2 + BeiDou B1 + Galileo E1 coverage and is especially designed for precision dual frequency positioning. The TW3870/TW3872 features a precision tuned, circular dual feed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wide-band LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output. The TW3870/TW3872 offers excellent axial ratio and a tightly grouped phase center variation. The TW3870/TW3872 covers GPS L2 (1227.6MHz), GLONASS G2 (1248MHz centre), GPS L1/WAAS/EGNOS/MSAS (1575.42MHz), GLONASS G1 (1602MHz, centre), BeiDou B1 and Galileo E1. (1561 and 1589 MHz). TW3870 Dimensions (mm) The TW3872 has a pre-filter which increases the antenna’s immunity to high amplitude interfering signals, such as LTE and other cellular signals. The TW3870/TW3872 is housed in a through-hole mount, weather-proof enclosure for permanent installations. L Bracket or Pipe Mount (part numbers 23-0040-0, 23-0065-0 respectively) are available for non-rooftop installation. A 100mm ground plane is recommended for non-roof-top installations. This product is also available in an OEM formats (TW3865, TW3870E, TW3872E, and TW3868) Applications • • • • • Precision GPS position Dual Frequency RTK receivers Mission Critical GPS Timing Military & Security Network Timing and Synchronization Features Benefits • • • • • • • • • • • • Very low Noise Preamp, < 2dB Axial ratio L1: ≤1 dB typ. 1.5 dB max. Tight Phase Center Variation LNA Gain 35 dB typ. Low current: 24 mA typ. ESD circuit protection: 15 KV Invariant performance from: +2.5 to 16VDC Ideal for L1/L2 RTK surveying systems Great multipath rejection Increased system accuracy Great signal to noise ratio IP67, REACH, and RoHS compliant TW3870 / TW3872 GPS L1/L2 + GLONASS G1/G2 + BeiDou B1 + Galileo E1 Specifications (Measured a Vcc = 3V, and Temperature=25°C) Antenna Patch Architecture L2 Gain (100mm ground plane), 1227.6-1246MHz L1 Gain (100mm ground plane), 1575.42MH-1606MHz Axial Ratio, L1/G1/E1/B1, L2/G2 1dB Bandwidth, Polarization Electrical Bandwidth Overall LNA Gain Gain Variation with Temperature. LNA Noise Figure VSWR (at LNA output) Supply Voltage Range EMI Immunity Supply Current ESD Circuit protection Out-of-Band Rejection L1 30 dB 30 dB >35 dB >1284 MHz >32 dB Mechanicals & Environmental Mechanical Size, Ground Plane Operating Temperature Range Enclosure Weight Attachment Method Environmental Shock Vibration Salt fog / spray 66mm x 21mm (see drawing on other page), 100mm ground plane recommended -40°C to +85°C Radome: EXL9330, Base: Zamak White Metal 185 g Permanent ¾” (19mm) through hole mount IP67, RoHS, REACH, and RED compliant Vertical axis: 50 G, other axes: 30 G 3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G MIL-STD-810F Section 509.4 Ordering Information TW3870 – GPS L1/L2 + GLONASS G1/G2 + BeiDou B1 + Galileo E1 33-3870-xx-yy-zzzz TW3872 - GPS L1/L2 + GLONASS G1/G2 + BeiDou B1 + Galileo E1 33-3872-xx-yy-zzzz Where xx = connector type, yy = shape and colour of radome and zzzz = cable length in mm (where applicable) Please refer to the Ordering Guide ( http://www.tallysman.com/wp-content/uploads/Current-Ordering-Guide.pdf) for the current and complete list of available radomes and connectors. Tel +1 613 591 3131 36 Steacie Drive, Ottawa ON K2K 2A9 Canada Fax 613 591 3121 sales@tallysman.com The information provided herein is intended as a guide only and is subject to change without notice. This document is not to be regarded as a guarantee of performance. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. © 2010 Tallysman Wireless Inc. All rights reserved. Rev 4.4