TW8889 TALLYSMAN | Alldatasheet

Document overview

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Technical content

Features

  • Very low Noise Preamp, 2.5dB
  • Axial ratio: <2dB typ.
  • Tight Phase Center Variation
  • LNA Gain 26 dB typ.
  • Low current: 12 mA typ.
  • ESD circuit protection: 15 KV
  • Invariant performance from: +2.5 to 16VDC Benefits
  • Lightweight (52g excluding cable and connector)
  • Ideal for L1/L2 RTK surveying systems
  • Great multipath rejection
  • Increased system accuracy
  • Excellent signal to noise ratio
  • IP67, REACH, and RoHS compliant The TW8889 employs Tallysman’s unique Accutenna technology providing dual band GPS L1/L2, GLONASS G 1/G2/G3, Galileo E1/E5b, and BeiDou B1/B2 coverage and is especially designed for precision dual frequency positioning where light weight is important. The TW8889 features a precision tuned, circular dual feed, stacked patch elem ent. The signals from the two ortho gonal 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 TW8889 offers excellent axial ratio and a tightly grouped phase center variation. The TW8889 covers GPS L2 (1227 .6 MHz, centre ), GLONASS G2 (1248 MHz, centre), GLONASS G3 (1201.5 MHz, centre), GPS L1/WAAS/EGNOS/MSAS (1575.42 MHz), GLONASS G1 (1602 MHz, centre), Galileo E1 (1575.42 MHz centre), Galileo E5b (1201.5 MHz, ce ntre), BeiDou B1 (1575.42 MHz, centre), and BeiDou B2 (1207.14 MHz, centre). The TW8889 has a pre -filter which increase s the antenna’s immunity to high amplitude interfering signals, such as LTE and other cellular signals. TW8889 GPS L1/L2 + GLONASS G1/G2/G3 + BeiDou B1/B2 + Galileo E1/E5b (all dimensions in mm)

TW8889 GPS L1/L2 + GLONASS G1/G2/G3 + BeiDou B1/B2 + Galileo E1/E5b Specifications (Measured a Vcc = 3V, and Temperature = 25°C) Antenna Patch Architecture Circular, Dual Feed, Dual Stacked Patch L2 Peak Gain (100mm ground plane), 1215-1240 MHz 4.0 dBic peak gain at Zenith G2 Peak Gain (100mm ground plane), 1237-1246 MHz 3.0 dBic peak gain at Zenith E5b/G3 Peak Gain (100mm ground plane), 1189-1214 MHz 1.0 dBic peak gain at Zenith L1 Peak Gain (100mm ground plane), 1575.42MH-1606MHz 4.0 dBic peak gain at Zenith Axial Ratio, over full bandwidth, both L1 & L2 ≤ 2dB typ., 1 dB max. at Zenith Polarization RHCP Electrical Bandwidth L2: 1170MHz-1278MHz (Filter bandwidth) L1: 1557 MHz-1606MHz (Filter bandwidth) Overall LNA Gain 27dB typ, 26 dB min, each of L1 and L2 Bands Gain Variation with Temperature. 3dB max over operational temperature range LNA Noise Figure 2.5dB typ @25°C VSWR (at LNA output) <1.5:1 typ. 1.8:1 max. Supply Voltage Range +2.5 to 16VDC nominal, up to 50mV p-p ripple EMI Immunity 50V/Meter, excepting L1+/-100MHz and L2 +/- 100MHz Supply Current 12 mA typ. at 25°C. ESD Circuit protection 15 KV air discharge. Out-of-Band Rejection L1 L2 <1450 MHz >47 dB <1000 MHz >70 dB <1520 MHz >35 dB <1100 MHz >36 dB >1650 MHz >30 dB >1130 MHz >30 dB >1800 MHz >49dB >1340 MHz >51dB Mechanicals & Environmental Mechanical Size, Ground Plane 100mm ground plane recommended Cable 2.6mm OD (RG174) Operating Temperature Range -40°C to +85°C Weight 52 g Environmental RoHS and REACH compliant Shock Vertical axis: 50 G, other axes: 30 G Vibration 3-axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G

Ordering Information

TW8889 - GPS L1/L2 + GLONASS G1/G2/G3 + BeiDou B1 + Galileo E1/E5a 33-8889-xx-yyyy Where xx = connector type, yyyy = cable length in mm (all 4 digits required) 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. Tallysman Wireless Inc

36 Steacie Drive

Tel +1 613 591 3131 Fax 613 591 3121 sales@tallysman.com The informatio n provided herein is inten ded as a guide only and is subject to change without notice. This document is not to be regarded as a guaran tee of performance. Tallysman Wireless Inc. hereby disclaims any or al l warranties and liabilities of any kind. © 2019 Tallysman Wireless Inc. All rights reserved. Rev 1.0