Veja grátis o arquivo SM GM Manual Tecnico enviado para a disciplina de Top ANT ANTA N T5 02 A N T5 03 BTC C C 10 02 C C. SERVICE MANUAL / # X / 10/ AKG CUSTOMER SERVICE DEPARTMENT / Laxenburger aus dem Gehäuse schieben. 1. C S MKIV. Service Manual Level III ™ DIGITAL WIRELESS TELEPHONE Model P Service Motorola regional Cellular Subscriber Support Centers offer some of the C10 C C C C C C C C C C .
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SM G360M Manual Tecnico
Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive c11000 to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this instruction manual may not be copied or reproduced in any mannerwithout the express written permission of Motorola.
Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applica-tions of Motorola, except for the normal non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.
This manual is the property of Motorola. No part of this manual may be duplicated in any celulad without the express written permission of Motorola. This manual must be returned upon Motorola cflular The information in this manual is subject to change without notice.
No guarantee is made for accuracy or thoroughness. This manual is intended as a training aid in conjuction with formal classes provided by Motorola.
Motorola takes no responsibility for the use of this manual beyond its intended scope. Motorola, the Motorola Logo and all other trademarks identified as such herein are trademarks of Motorola, Inc.
All other product or service names are the property of their respective owners. All rights reserved About This Manual Scope of Manual General Safety Information This manual is intended for use by experienced technicians familiar with similar types of equipment.
It is intended primarily to support basic servicing, which consists primarily of mechanical repairs and circuit board replacement. Authorized distributors may opt to receive additional training to become authorized to perform limited component repairs. Contact your regional Customer Support Manager for details.
Model and Kit Identification Motorola products are specifically identified by an overall model number on the FCC label. In most cases, assemblies and kits which make up the equipment also have kit model numbers stamped on them. The Cellular Subscriber Support Centers are able to perform computerized adjustments and repair most defective transceivers and boards.
Portable Operation DO NOT hold the radio so that the antenna is very close to, or touching, exposed parts of the body, especially the face or eyes, while transmitting. The c10000 will perform best if it is held in the same manner as you would hold a telephone handset, with the antenna angled up and over your shoulder. Speak directly into the mouthpiece. DO NOT operate the telephone in an airplane. DO NOT allow children to play with any radio equipment containing a transmitter.
Mobile Operation Vehicle Adaptor As with other mobile radio transmitting equipment, users are advised that for satisfactory operation of the equipment and for the safety of personnel, it is recommended that no part of the human body shall be allowed to mnaual within 20 centimeters of the antenna during operation of the equipment. DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere.
Mobile telephones are under certain mnual capable of interfering with blasting operations. When in the vicinity of construction work, look for and observe signs cautioning against mobile radio transmission.
In standby mode, the mobile telephone will automatically transmit to acknowledge a call mmanual it is not turned off. All equipment must be properly grounded according to installation instructions for safe operation. The portable telephone should only be used in situations in which the driver considers it safe to do so.
Use of a cellular portable while driving may be illegal in some areas. Refer to the appropriate section of the product service manual for additional pertinent safety information. Table of Contents About This Manual A4 Custom IC U A8 TX Offset Oscillator A10 Merlin TX U A16 RF Detect Circuit A47 Layout Side A48 Layout Side A49 RF Block Diagram A cellular system consists of a more or less continuous pattern of these cells, each having a 1 to 40 mile radius typically 5 – 10 miles.
Within each cell is a centralized cell site with an elevated antenna and a building. The building houses a base station with transceivers and related control equipment for the channels assigned to that cell.
All the cell sites within a system are then connected either by dedicated land lines, microwave links, or a combination of both to a central control site called the central controller or switch. The switch controls the entire cellular system and serves as the interface between the cellular telephone user and the landline network.
Each cell site operates on an assigned access channel, and may have any number of paging and voice channels assigned to it. Secondary Control Channels Digital cellular multiplexes voice channels to allow for the possibility of several additional conversations on a single channel.
The cellular radio frequency spectrum has been divided by the FCC into two equal segments or bands to allow two independent cellular carriers to coexist and compete in the same geographic coverage area. Each band occupies one half of the available channels in the cellular spectrum.
Initially there were channels available across the entire cellular spectrum, but that number was expanded to channels inand with NAMPS to 2, channels in Digital cellular promises to make a further expansion. To guarantee nationwide compatibility, the signaling channel frequencies have been pre-assigned to each segment band.
The two bands and their assigned channels Originally the B Band was assigned to the telephone company referred to by a euphemism, the Wireline carrier. The A Band, by default, was referred to as the Non-Wireline carrier, guaranteed competition to the telephone company. Today the terms Wireline and Non-Wireline have little meaning since telephone company carriers now operate A Band systems, and vice-versa.
Control Data Channels A cellular telephone in the cellular system is under the indirect control of the switch, or central controller. The central controller uses dedicated control channels to provide the sig- Figure 2. Control channels are used to send and receive only digital data between the base station and the cellular telephone.
Voice channels are used for both audio and signaling once a call is established. The 21 control channels in each band may be dedicated according to two different applications: The data on the forward control channel generally provides some basic information about the particular cellular system, such as the system ID and the range of channels to scan to find the access and paging channels.
Access channels are used to respond to a page or originate a call. The system and the cellular telephone will use access channels where two-way data transfer occurs to determine the initial voice channel. Paging channels, if used, are the normal holding place for the idle cellular telephone.
When a call is received at the central controller for a cellular telephone, the paging signaling will occur on a paging channel. In many systems both control channel functions will be served by the same control access channel for a particular cell. Only in very high density areas will multiple control paging channels be required.
Motorola P Service manual |
Primary control channels are used by all types of telephones. Voice Channels Voice channels are primarily used for conversation, with signaling being employed as necessary to handle cell-to-cell hand-offs, output power control of the cellular radiotelephone, and special local control features. In AMPS signaling, various control and response tones are used mnual a variety of applications to be described later.
However, in NAMPS signaling, the signaling data and tones have been replaced by sub-audible digital equivalents that constantly ride underneath majual audio. And, of course, in digital cellular, all signaling is digital. AMPS Advanced Mobile Phone Service ceelular the invention manuao Bell Labs, the signaling protocol that was ultimately adopted by all the governments eclular the entire Western Hemisphere and, eventually, several other governments throughout the world.
The truth is that AMPS is very much alive, at the very cepular of all these traffic expanding alternatives to the original signaling protocol developed for conventional cellular telephony. Under the original AMPS protocol there were 21 control channels assigned to each of two possible carriers in any metropolitan area, with a total of channels assigned to each carrier.
In the Cekular expanded the cellular spectrum Expanded Spectrum from a total of channels to channels, allowing for an increase of 83 voice channels for each carrier. But the number of control channels remained constant, 21 control channels for each carrier.
But one thing remained constant, there were 21 control channels for each carrier. At a basic level, cellular telephony has two divisions: In the succeeding section, digital cellular will be treated. Inwhen Motorola tested its TDMA digital product, digitizing three communication links on each of voice channels, one thing remained constant: Leaving the control channels more or less untouched is the key to allowing telephones that are not capable of NAMPS or digital operation to have access to the system using the conventional AMPS scheme.
The simplified block diagram on page 1 – 7 illustrates an imaginary layout of one side Band A, or Band B of a hypothetical service area.
The hexagons represent cells, and some of the cell sites shown here also illustrate the fact that an antenna tower and set of base stations are associated with each site. In a real world environment individual cells do not have the hexagonal shape but may take any form as dictated by the environment.
As illustrated figure ceelular. The cell sites are in communication with individual portable and mobile cellular telephones. Channel Assignments The switch center left is in control of the system and interfaces with the central office of c10000 telephone company. As illustrated by the deskset telephones, the telephone company interfaces with the entire landline network.
The cell sites and the mobiles and portables communicate through the use of data or, in the case of AMPS, through the use of data and tones. A complete analysis of data signaling is beyond the scope of this manual. NAMPS uses sub-audible digital equivalents. Cwlular burst lengths are used for different ST activities. SAT or DSAT is generated by the cell site, checked for frequency or accuracy by the cellular telephone, then transponded that is, not merely reflected but generated and returned to the cell site on the reverse voice channel REVC.
The cellular telephone uses D SAT to verify that it is tuned to the correct channel after a new voice channel assignment. When the central controller switch signals the mobile regarding the new Figure 4.
Data is used for sending System Orders and Mobile Identification. Do not confuse data with the 10 kHz signaling tone.