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TD 90227GB

2006-09-18/ Ver. C

System Installation

On Site Paging System

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Summary of Contents for T942PX

Page 1: ...TD 90227GB 2006 09 18 Ver C System Installation On Site Paging System...

Page 2: ...8 Extended Wiring Lengths 3 2 Telephone and PBX Connection 3 3 Transmitters 3 3 1 Frequency Locked Transmitters 5 3 2 Without Modem to Transmitters 5 3 3 With Modem to Transmitters 6 4 Receivers 7 5 A...

Page 3: ...ic fields vibration or rapid temperature changes The procedure for the installation of each unit is described in the installation guide for the respective unit 1 1 OSP On Site Paging PBX Private Branc...

Page 4: ...C bus is used for communication between different installations i e between two or more Central Units D bus transmits pagings in transmit format from the Central Unit to one or several Terminal Trans...

Page 5: ...n leased lines 2 Telephone and PBX Connection A telephone set or a PBX can be used as control unit via a PBX Interface module The PBX Interface accepts both dialling pulses and DTMF tones and can be c...

Page 6: ...connect an antenna to the line amplifier especially in speech systems where speech quality depends directly on coverage Slave transmitters are connected with coaxial cable RG 8 or RG 213 with a maxim...

Page 7: ...Terminal Transmitter s circuit board Reference Module T938RM with drive circuits for FL bus controlled by the Central Unit Bus Amplifier T938BA T938RM without ref tone generator with drive circuits f...

Page 8: ...y The transmitter code on the D bus is always generated by the Central Unit Be sure that the same number of modem pairs are used between the Central Unit and each Terminal transmitter Several Terminal...

Page 9: ...eech Modem Modem Compensator Fixed Receiver Terminal Transmitter Data Modem Receiver Interface Data Modem Figure 6 Terminal site with SP bus 4 Receivers Talk back Receivers are always connected to a R...

Page 10: ...h as ground plane dipole and helix antennas but the choice of type should be made to suit the actual site In some cases other types of antennas may be required due to the terrain or climatic condition...

Page 11: ...ground plane antenna for mounting on a mast The antenna is frequency adjusted by cutting the fibre glass elements to the correct length according to the diagram that is delivered with the antenna The...

Page 12: ...a Location An outdoor antenna should be located as centrally and unobstructed as possible within the designed coverage area The antenna must not be placed near metal clad chimneys or similar structure...

Page 13: ...ne location The power supply is connected to screw terminals on one of the units and then connected in series to the other units The wiring from the power supply must be dimensioned so that the voltag...

Page 14: ...ng interface T966CI are powered via the 12 conductor cable Charging racks not connected to the interface must be powered separately Linear power supplies are generally recommended specially for the tr...

Page 15: ...he hex digits 0 F OFF ON Hex 0 OFF ON Hex 8 Hex 1 Hex 9 Hex 2 Hex A Hex 3 Hex B Hex 4 Hex C Hex 5 Hex D Hex 6 Hex E Hex 7 Hex F 1 OFF ON Hex 0 Hex address 00 8 Hex 0 1 OFF ON Hex 1 Hex address 01 8 He...

Page 16: ...tween the transmitters but cannot be used in speech systems Address Register 0 0 0 1 0 2 0 3 0 4 1 0 2 0 T942C T942PX T840IU T966CI U952T U952T U952T Attic head office Exchange room head office Exchan...

Page 17: ...age area by transmitting pagings with speech if applicable and compare with the expected coverage area If coverage is not as expected check the installation and location of the antenna If this does no...

Page 18: ...pled This must be considered when planning a combined system installation T850 U952 T840 Figure 17 An example of an installation that cannot function due to grounding Both transmitters are mounted on...

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