Motorola PTP 600 Series Bedienungsanleitung

MemoryLink UltraSync™ GPS-100M

GPS Synchronization Unit

for PTP 600 Series Wireless Ethernet Bridges

GPS SYNCHRONIZATION UNIT GUIDE

Pg Section

3Introduction

4System Overview

5Product Features and Beneﬁts

6Installation

Contents

The information in this publication is subject to change without notice.

Motorola shall not be liable for technical or editorial errors or omissions nor for any damages resulting from

the use of this material.

Each conﬁguration described may or may not be the only available solution. The description is not a

determination of product quality or correctness, nor does it ensure compliance with any federal, state or

local requirements. Motorola does not warrant products other than its own strictly as stated in Motorola’s

product warranties.

GPS SYNCHRONIZATION UNIT GUIDE

The Motorola wi4 Fixed Point-To-Point (PTP) 600 Series Wireless Ethernet Link, which consists of a pair of

radios deployed one at each end of the link, operates on a single frequency channel in each direction using

Time Division Duplex (TDD). In situations where a number of radios are installed on the same mast or where

a large number of links are installed in a sizeable, dense network, it is possible that the performance or

throughput of some of the links can be reduced. In some cases, a number of the links may not work at all.

This is due to interference between the units, and the levels of interference can worsen when the links are

operating on the same or adjacent channels.

Introduction

The effect of this cross interference between units can be reduced by ensuring that the radios are in

synchronism, meaning that transmit and receive frames of the units are synchronized so they do not

interfere with each other. TDD Synchronization introduces a ﬁxed TDD framing mode and allows frame

timing in a PTP 600 link to be synchronized with an external reference – a Global Positioning System (GPS) unit.

The result is that TDD synchronization minimizes the interference between links and promotes optimal

spectral re-use while greatly enhancing link performance. By timing and synchronizing transmit and receive

signals, network operators can co-locate multiple radios on a rooftop or tower without interference.

Simple example of cross-

interference when three links of

different lengths are mounted

on a mast and operating on the

same or adjacent channels

Before TDD Synchronization

Link 1

Link 3

Interference Link 3 to Link 2

Interference Link 1 to Link 3

Interference Link 3 to Link 1

Interference Link 2 to Link 1

Interference Link 1 to Link 2

Interference Link 2 to Link 3

Link 2

Time

Transmit Receive

After TDD Synchronization

Link 1

Link 3

Time

Link 2

Transmit Receive

GPS SYNCHRONIZATION UNIT GUIDE

System Overview

To meet the high performance standards of a Motorola PTP broadband wireless network, Motorola has

partnered with MemoryLink to deploy the MemoryLink UltraSync™ GPS-100M in a Motorola wi4 Fixed

Point-to-Point (PTP) 600 Series network. With its integrated GPS receiver and internally-mounted antenna,

the UltraSync GPS-100M generates a precise, highly stable, proprietary synchronization signal that is used

by the PTP 600 Series radios to time and synchronize transmit and receive signals.

In fact, the UltraSync GPS-100M is critical to a wireless network’s efﬁciency and reliability as PTP 600

radios transport Time Division Duplex (TDD) data over the link, particularly in a high-interference coverage

area where multiple radios and channels are in use. The UltraSync GPS-100M’s high-quality components,

including an active antenna that functions even in low-signal environments, and its NEMA 4X and UL 508

outdoor-rated enclosure, ensure highly reliable performance. Like the Motorola PTP 600 Series units, the

UltraSync GPS-100M is rugged, performing consistently in harsh climates and challenging radio-frequency

(RF) environments.

The robust, reliable UltraSync GPS-100M generates a synchronization signal that originates from the atomic

clocks on the GPS satellites that orbit the earth.

Both existing and prospective operators of a Motorola PTP 600 Series network can reap the beneﬁts of the

UltraSync GPS-100M’s superior GPS signal synchronization since the UltraSync GPS-100M comes

pre-wired for new systems, and can be retroﬁtted for existing PTP 600 Series links.

MemoryLink UltraSync GPS-100M

GPS Synchronization Unit

(Motorola Part Number WB3001)

GPS SYNCHRONIZATION UNIT GUIDE

Product Features and Beneﬁts

UltraSync™ GPS-100M Features:

• Integral GPS receiver – 12 channel

• Passes 1000 Base-T protocol

• Supports Ethernet cable lengths of up to 330 feet (100 meters) from the PTP 600 PIDU Plus to the

UltraSync GPS-100M Eth1/PWR port

• Robust enclosure weighing approximately 23 ounces (650 grams)

• Small footprint – 5.92” (150 mm) height, 3.95” (100 mm) width and 2.79” (71 mm) depth

• Includes internally mounted GPS antenna, mounting bracket, screws, Ethernet cables and cable glands

for waterproof ingress/egress

• Connects via RJ-45 connector to PTP 600 Series radios equipped with a sync port

• Operates at temperatures from – 40° F to +140° F (-40° C to +60° C), even in high humidity

UltraSync GPS-100M Beneﬁts:

• Minimizes interference between multiple links on a single mast

• Improves frequency re-use

• Reduces spatial / angular separation between PTP links when installed on the same mast

• Accurately provides the timing synchronization for PTP 600 Series links

• Internally mounted GPS antenna requires no antenna change to the PTP 600 Series link

• Robust operating features allow continuously high performance

• Small footprint and lightweight form factor allow easy installation

Ordering

The MemoryLink UltraSync GPS-100M can be ordered directly from Motorola under the following part

number and product description:

WB3001 – MemoryLink UltraSync GPS-100M for PTP 600

GPS SYNCHRONIZATION UNIT GUIDE

Installation

Enabling TDD synchronization is a two-stage process:

• Install the GPS Synchronization Unit (Motorola part number WB3001)

• Enable TDD synchronization mode on the PTP 600 radio and conﬁgure related parameters using the

PTP 600 Web GUI interface

The following are deployment considerations for an UltraSync™ GPS-100M with a PTP 600 Series link:

• Fixed-frequency operations only

• Fixed TDD operation only – all synchronized links have the same ratio master to slave

• Not presently available when radar avoidance is enabled

• Networks need to be planned carefully

The following illustration shows the connections in the UltraSync GPS-100M:

• Interface Speciﬁcations

> Sync Port (Port 1): Motorola proprietary differential 3.3V (nominal) peak-to-peak signal presented

on pins 4(+) and 5(-) of Port 1 (RJ-45 connector)

> Ethernet pass-through on Ports 2 and 3

• Maximum Cable Lengths

> Sync Port: 2’ (0.6 m)

> Ethernet Port 2: 330’ (100 m)

> Ethernet Port 3: 2’ (0.6 m)

Motorola strongly recommends purchasing and installing the Motorola wi4 Fixed PTP Lightning Protection

Unit (PTP-LPU) as an integral part of a PTP 600 Series network. Because PTP 600 Series radios are often

located in situations that can attract lightning, the PTP-LPU shields the radio from sudden power surges

caused by electro-magnetic activity (lightning) before they can harm the unit. Two Lightning Protection Units

are required for each radio – installed on the wall, tower or mast adjacent to the PTP 600 radio, and one

installed at the cable entry point of the building in which the network resides. When correctly installed, the

Motorola PTP-LPU gives the PTP 600 Series radio the best protection from the harmful effects of lightning.

However, 100% protection is neither implied nor possible.

Sync Port 1 to ODU

Pass Through Port 2 Ethernet

Pass Through Port 3 Ethernet

UltraSync GPS-100M

Connections

GPS SYNCHRONIZATION UNIT GUIDE

Installation continued

The following diagram shows how to connect the UltraSync™ GPS-100M to the PTP 600 ODU ﬁtted with

a Lightning Protection Unit (PTP-LPU):

The UltraSync GPS-100M sits between the Lightning Protection Unit and the ODU (outdoor unit) of a PTP

600 Series link. One UltraSync GPS-100M is required for each link. The unit receives a stable, accurate timing

signal from its integrated GPS receiver, which obtains signals generated concurrently from 12 medium-earth-

orbit satellites. That signal is fed to the PTP 600 ODU via its SYNC port, giving the link a reference point for

timing synchronization.

UltraSync GPS-100M

deployment diagram with a

PTP 600 Series radio and a

PTP Lightning Protection Unit

Once the UltraSync GPS-100M has been installed, the PTP 600’s TDD synchronization capability can be

enabled and conﬁgured using the PTP 600’s installation wizard. For complete installation details, refer to the

UltraSync GPS-100M User Manual and the PTP 600 User Manual.

GPS SYNCHRONIZATION UNIT GUIDE

8GPS WB PTP GPS GD 021108

GPS SYNCHRONIZATION UNIT

MOTOwi4™

The wi4 Fixed PTP 600 Series bridges and the wi4 Fixed PTP Lightning Protection Unit are part of

Motorola’s MOTOwi4 portfolio of innovative wireless broadband solutions that create, complement and

complete IP networks. Delivering IP coverage to virtually all spaces, the MOTOwi4 portfolio includes wi4

Fixed, wi4 Mesh, wi4 Indoor and wi4 WiMAX solutions for private and public networks.

Motorola, Inc., 1303 E. Algonquin Road, Schaumburg, Illinois 60196 U.S.A. +1 877 515-0400 • www.motorola.com/ptp

MOTOROLA and the Stylized M Logo are registered in the U.S. Patent and Trademark Ofﬁce. All other product or service names are the property of their respective owners.

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