User Manual FS31R-15C VHF RRU 162 – 175 MHz Fiber-Fed Remote Repeater Unit (RRU) 4 Watts Linear Output Power Version 3 5/1/2012 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
1. Limitation of Liability Copyright 2011 Fiber-Span. All rights reserved. No part of this publication, or any software included with it may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, including photocopying, electronic, mechanical, recording or otherwise, without the prior written permission of the copyright holder.
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2. Introduction The FS31R-15C Very High Frequency (VHF) Fiber Optic Remote Repeater Unit (FO-RRU) is a linear 4 Watts (36 dBm) RF power amplifier covering the frequency range from 162 to 175 MHz. The unit offers fiber input / output interface for long haul operation through a single mode fiber medium. Device improves in-building wireless coverage enhancement to eliminate dropped calls and poor reception by amplifying and re-broadcasting a cell tower signal throughout a building.
4. Table of Contents 1. Limitation of Liability............................................................................................................. 1 2. Introduction ............................................................................................................................. 1 3. Revision History ..................................................................................................................... 1 4. Table of Contents .........................................
14.1. Preventative Measure for Optimal Operation ........................................................... 13 15. Factory Settings ................................................................................................................. 15 16. Outline Drawing................................................................................................................. 16 17. Front / Rear Panel Ports and Interfaces............................................................................
5. Warnings Invisible laser radiation exits from areas labeled “Aperture” By connecting all the fiber connector ends of the optical link before applying power to both Figure 1: Laser Warning Label fiber transceiver unit and remote fiber node, it will prevent exposure to invisible laser radiation. RF Signs Follow and comply with all site safety policies, local codes and rules ordinances.
While in operation do not touch heat sink as surface is very HOT. Device maximum composite optical input level is 7 dBm. Only a qualified technician shall be allowed to operate the unit, after reading and understanding all the guidelines in this manual. 6. Main Product Name There are two (2) main product versions: Model Prefix Model Midfix Version FS31R-15C WM Wall Mount FS31R-15C RM Rack Mount 7.
Part Number Description Quantity 290-0061 Fiber Optic Transmitter / Receiver 1 The main parts are the same for the wall mount and rack mount versions excluding the RF cable interfaces and wiring harnesses that vary in length. Some or all the parts are subject to change without notice for the purpose of improving the product functionality. 8.
9. Startup Checklist The rack mount version unit has a VAC inlet that comes with a six (6) feet 3 prong VAC cord and the wall mount version unit has an embedded six (6) feet 3 prong VAC cord that plugs to a common house hold AC outlet. To protect the device RF output port, it includes a 50 Ohm load terminator that should not be removed until the RF output cable is ready to connect to it. 10. Installation 10.1. Connecting RF Follow these steps for connecting and disconnecting RF cables to the unit.
10.2. Mounting installation In a well structured support wall that it is reinforced with a 1 inch thick plywood of additional backing, mount the enclosure using four (4) socket head cap screws size 3/8”-16, 1-1/2 inch length to bear the enclosure weight (80 lbs). 11. Block Diagram The FS31R-15 rack mount and wall mount unit internal parts are the same without internal duplexer is shown in Figure 3: Remote Repeater Unit (RRU) Block Diagram. Unit choices are with internal or external duplexer.
Figure 4: UUT Downlink Test Setup Block Diagram 12. Specifications 12.1. Electrical Dowlink Path Typical Max (1) Units -15 -10 dBm -- 173.825 MHz -- +/- 2.0 dB 50 56 dB 56.5 61.0 -- dBm -114 -90 -75 dBm/1Hz RF Parameters Acronym Composite RF Input (2) RFin Frequency Freq 169.5625 Flatness Flts -- RF Gain (3) RFG 48 Output Intercept Point OIP3 Output Noise O.N. 9 Min 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
Composite RF Out and Automatic ALC 36.0 37 dBm Forward Power Alarm FPM 39 40 dBm Test Frequencies F1/F2 172.000 – 172.500 MHz Level Control Calculated Values Spur Free Dynamic Range SFDR dBm/2/3 100 Hz Uplink Path RF Parameters RF Input (4), (5) Frequency Acronym Min Typical Max (1) Units RFin -80 -55 -19 dBm Freq 162.175 166.4375 MHz +/- 2.00 dB 56 dB 3 dBm Flatness -- RF Gain (3) -- -7 RF Out 0 Output Noise -115 Test Frequencies F1, F2 dBm/2/3Hz 164.
(4) Uplink RF input level at -20 dBm triggers the squelch and RF will shut off. (5) Factory test RF input level into reference fiber transmitter is -19 to -23 dBm. RF Gain Adjustment RF Gain has a wide adjustment range thus it is set to the minimum value of 37dB at 0 dBo loss and increases proportionally as the fiber medium optical loss goes up. Normalization of the Link RF Gain due to increase in optical loss: Tip Increase up the RF Gain by 2 (dB) for every 1 (dBo) of fiber medium optical loss.
12.4. On Site Requirements For each RRU a three (3) wire (Hot, Neutral, and Ground) 120 VAC wall outlet including a separate earth ground bus bar that connects to the unit chassis. Two 9/125 um single-mode fiber strands with SC/APC connectors, one for the downlink path and the other for the uplink path. A unit as a simplex configuration requires two (2) high quality RF cable with N-Male connector that attaches from the DAS to the RF Input and Output port.
Unit can be cleaned without being turned off, but do not disrupt or touch any moving mechanism in a way that can stall the motor. Replace a fan immediately upon fan alarm indicator turning on. Shut off the unit to preserve the lifespan when a fan or fans cannot be replaced immediately. 14.1. Preventative Measure for Optimal Operation Optical Maintenance Once optical connectors are secured the ports no maintenance is required.
1. Clean SC-APC connectors and Adapters with isopropyl alcohol (99%), dust free fiber optic cleaning tissues and 2.5mm mini-swabs. 2. While performing these steps protect connector tips from scratching. 3. Clean the inside of the fiber optic adapters and bulkheads using a swab lightly moistened in isopropyl alcohol. 4. Gently insert swab into the adapter orifice until the back-stop is reached, rotate swab clockwise several times. Discard swab after each use. 5.
10. Always install SC/APC connectors into adapter or bulkhead by hand.
Monitors and Controls Fiber Transmitter Fiber Receiver RF FOTX FORX Power Amplifier Optical power TX Set-point Optical minimum DL Attenuation Range input threshold UL Attenuation Range Laser Bias Automatic Level Control Temperature Forward Power Monitor Alarm Sensitivity 16. Outline Drawing Enclosure Type Size inches (mm) Rack Mount 19 x 18 x 6.95 (465.1 x 457.2 x 6.95) Wall Mount 20 x 20 x 9 (508 x 508 x 238.5) Figure 9: Wall Mount 16 3434 Rt.
Figure 10: Rack Mount 17 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
17. Front / Rear Panel Ports and Interfaces Rack Mount 1 2 3 4 5 6 Rear View 7 8 Front View 1. 2. 3. 4. 5. 6. 7. 18 VAC In Inlet Ground Lug Circular Alarm Connector Optical Input Port Optical Output Port RF In / Out Port Power LED Indicator 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
8. Alarm LED Indicator 9. USB Port Wall Mount 1 2 3 4 6 5 Bottom View Bottom Panel Ports and Interface 1. 2. 3. 4. 5. 6. 19 RF In / Out Port Circular Alarm Connector Optical Input Port Optical Output Port VAC Cord Ground Lug 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
18. FCC Statement Manufacturers Notes “Changes or modifications not expressly approved by the manufacturer could “Void” the user’s authority to operate the equipment”. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
19. Warranty 19.1. General Warranty The RFN carries a standard warranty period of one (1) year unless otherwise indicated on the shipping packages as noted in the purchase order agreement. 19.2. Limitations of Warranty The warranty is limited to the repair or replacement of the defective product. Fiber-Span will decide which remedy to provide for defective components as its own discretion.
20. Company Information 22 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
Appendix A FS31R-15C RRU Media Converter This section calls out the hardware needed and explains how to connect the media converter section of the Remote Repeater Unit (RRU) for approving its functionality. Hardware Needed 1. One media converter (for use as reference) including its power supply. 2. One SFP module. 3. Two 9/125 um single mode fibers SC/APC-to-LC/PC (1 meter length). 4. Three Ethernet cables (RJ45 connectors). 5. One PC or Laptop. How to connect: 1.
Reference FS31R-15C 180-0113 RRU Ethernet Media Cable Converter 2- Single (DUT) Ethernet Cable Mode Fiber Dell Power Connect 16-Port Gigabit Ethernet ‘Switch’ or Equivalent LAN >> Using PC open and access WEB Ethernet Cable Figure 11: RRU Media Converter Test Setup Block Diagram Turn on the PC and open an internet browser. Using a search engine like Google, check on the internet for the today’s news. If you are able to do so, the media converter section is functioning properly.
re-clean tip with isopropyl alcohol until the internet is accessible. Another problem can be that the fiber cables are incorrectly crossover. The fiber path of the RRU transmitter side connects to the Receiver side on the reference media converter and the fiber path of the RRU receiver side connects to the transmitter side of the reference media converter. A-3 3434 Rt. 22W ▪ Suite 140 Branchburg, NJ 08876 908.253.9080 ▪ fiber-span.
