TELECOM SOLUTIONS GPS Active Splitters INTRODUCTION Symmetricom Active Splitters have a minimum of 40 dB isolation at Symmetricom’s Active Splitters allow KEY FEATURES common GPS LO frequencies between multiple GPS receivers to share a every combination of output ports. 58535A & 58536A Active Splitters single antenna. Designed for both Extensive field testing by GPS and • Multiple Ports manufacturing and position/timing cellular base station manufacturers redundancy applications, GPS L1 Active • High Isolation has demonstrated suitability for use Splitters provide dependable signals for • Waterproof and the long-term dependability of two, four or eight GPS receivers. Symmetricom GPS L1 Active Splitters. • Base Station Applications For large manufacturing facilities, CONVENIENT DC POWER SIMPLIFIES 58517A Active Splitter Symmetricom Active Splitters can YOUR INSTALLATION • High Isolation provide as many GPS-L1 (1575.42 MHz) signals as your manufacturing floor Power is conveniently obtained from • Three Ports requires. With built-in amplification the GPS receiver(s) connected to the • Manufacturing Applications to overcome splitter losses, the Active amplifier. This eliminates the need for Splitters can be conveniently cascaded a separate dc power supply and wiring. 090-58537-01 Active SmartSplitter without adding separate amplifiers and DC power applied to the splitter is also • Proven Design bias-tees between splitters. passed on for use by an active antenna, • Micro-controlled further simplifying your installation. The HIGH ISOLATION ELIMINATES • Meets E911 Requirements 58535A (2 outputs), 58536A (4 outputs), RECEIVER INTERACTIONS and 090-58537-01 (4 outputs) obtain • Senses BIAS Voltage on Each Output power from a GPS receiver connected Port Symmetricom GPS Active Splitters have to any port. The 58517A (8 outputs) the essential port-to-port isolation receives power from the GPS receiver required to eliminate interaction connected to port 1, and has an optional between multiple GPS receivers. external DC connection if needed. Without such isolation, local oscillator (LO) leakage from one GPS receiver can prevent other receivers from acquiring time and position signals and maintaining lock. In wireless base station applications, poor isolation can disable cell sites. In GPS manufacturing tests, poor isolation causes repeatability problems which can reduce yields and cause false rework. 58535A and 58536A GPS Active Splitters 1:4 Active SmartSplitter 1:4 ACTIVE SMARTSPLITTER The 1:4 Active SmartSplitter is based on Symmetricom’s proven design of our 58536A 1:4 Active Splitter. This new splitter has been designed to meet the requirements of implementation of wireless enhanced 911 (E911) emergency location services in new and existing wireless base stations. Its input port is located on one side of the unit and its 4 output ports are located on the opposite side of the unit. This arrangement makes cable installation and hook-up simple and easy. 1:4 ACTIVE SMARTSPLITTER’S MICROCONTROLLER The purpose of the micro-controller is to sense the bias voltage present on each of the output ports, and it always selects the lowest numbered port (1, 2, 3 or 4) to supply power to the splitter and to the GPS antenna. Each of the FIG 1. The 0 +1dB Pass Band Gain Performance of the four ports three remaining ports is configured by the micro-controller of a typical splitter at L1 (1575.42MHz) +10 MHz. to sink a “standby” current of 25mA @5V. The 1:4 Active SmartSplitter can be used with the new 093- 58536-10 Universal Mounting Bracket. Both the splitter and mounting bracket can be ordered together as a kit (990- 58537-01). • Damage threshold GPS Active Splitters Specifications Additional 1:4 Active SmartSplitter 58535A, 58536A, and 090-58537-01: Specifications NUMBER OF OUTPUT PORTS 18 V dc either polarity • 58535A: 2 58517A: 30 V dc either polarity PHYSICAL SPECIFICATIONS • Operating current • 58536A: 4 • Weight: 1.5 Lbs /0.68 kg 58535A and 58536A: 23 to 48 mA depending on voltage • 58517A: 8 58517A: 10 mA ENVIRONMENTAL SPECIFICATIONS • 090-58537-01: 4 090-58537-01: 13 mA typical • Operating temperature: -35°C to +75°C, Meets EN 300 • Passthrough current: 450 mA, all models 019-2-4 test per IEC 60068-2-1, 2, 14 ELECTRICAL SPECIFICATIONS • Group delay: 40 ns typical, all models • Waterproof: Meets MIL-STD-810E, Method 512.3, • Input/output impedance: 50Ω Procedure 1 • VSWR (typical) Input Output PHYSICAL SPECIFICATIONS • Corrosion protected: Meets Telcordia GR-487-CORE, 58535A: 1.2 1.6 • RF connectors: Female N-type, all models Salt Fog R3-203 58536A: 1.2 1.6 58517A: 1.5 1.5 • DC power connector: Female SMC (optional only on • Vibration: Meets IEC 60721-3-4 Class 4M5 58517A) 090-58537-01: 2.1 2.1 • Bandwidth (–3 dB): L1 (1575.42 MHz) ±20 MHz • Dimensions (including RF connectors) UNIVERSAL MOUNTING BRACKET - 58535A and 58535B: The 093-58536-10 Universal Mounting Bracket allows • Gain (antenna input to any output at L1) 58535A: 3dB ±3dB 95 mm W x 130 mm L x 35 mm H the flexibility of mounting the 090-58537-01 1:4 Active (3.75 in. x 5.12 in. x 1.38 in.) SmartSplitter on a pole, flat rack, or to a roof surface. 58536A: 0dB ±3dB 58517A: 0dB ±4dB It is easily disassembled and reassembled into the - 58517A: 100 mm W x 160 mm L x 31 mm H configuration needed at the time of installation. 090-58537-01: 0dB ±3dB (4 in. x 6.3 in. x 1.25 in.) • Noise figure: 5dB typical, all models Includes optional external dc power connector PRODUCT SPECIFICATIONS - 090-58537-01: 185 mm W x 101.6 mm L x 44.4 mm • Port-to-port isolation L1 +/-40 MHz • Corrosion protected: Zinc plated 58535A: 54dB typical to 76.2 mm H 58536A: 50dB typical (7.3 in. x 4.0 in. x 1.75 to 3.0 in.) SMARTSPLITTER KIT 58517A: 40dB typical • Weight 090-58537-01: 50dBc typical The 990-58537-01 1:4 SmartSplitter Kit enables one - 58535A and 58536A: 0.5 kg to order both the splitter and the universal mounting • AC input level - 58517A: 0.75 kg bracket in one combined package. • Maximum input level: –25dBm, all models • RF connectors: N-Type • Damage threshold 58535A, 58536A, and • Dimensions: 185 mm W x 64 mm L x 34.5 mm H|(7.3 090-58537-01: +17dBm in. x 2.5 in. x 1.4 in.) 58517A: +13dBm • Operating temperature • DC power (Operating voltage) - 58535A and 58536A: –35°C to +75°C 58535A, 58536A, and 090-58537-01: +4.5 to +13 V* dc 58517A: 4.5 to +30 V dc - 58517A: 0°C to 55°C *Caution: Operating voltage is passed through to the antenna.The 58532A Antenna operates on +5 Vdc nominal. Applying more than +5 Vdc may damage the 58532A. © Copyright 2010 Symmetricom, Inc. All rights reserved. Symmetricom and the Symmetricom logo are registered trademarks of Symmetricom, Inc. All other trademarks are the property of their respective companies. All specifications subject to change without notice. 03-25-10 www.symmetricom.com Phone: +1 408 428 7907; toll-free: +1 888 FOR SYMM | Fax: 408-516-9597 | E-mail: support@symmetricom.com