Damm Cellular Systems A S 104013 Door System Transmitter User Manual Revised Notes to Installers

Damm Cellular Systems A/S Door System Transmitter Revised Notes to Installers

Revised Notes to Installers

Notes to Installers/ Technicians  The TR412 is a self contained single carrier transceiver card that slide into our BS 411 and BS 414 rack systems.  The  TR412 card  is  FCC  approved for use  and  only fit in Damm  Cellular  equipment.    The  TR412  will  only  fit  these  rack  systems.    The  base station  supplies  both  the  power  supply  voltages  and  the  programming/network connectivity required to make the base stations function.   Complete operational documentation is included in the Damm Cellular TETRA User’s Manual Version 7.5.   RF Exposure  The TR412 when installed in the base stations are designed for use with antennas that are  fixed  mounted  on  permanent  structures.    The  antenna  system  used  can  have many different configurations and gains.  The separation distance between and other operational  requirements  concerning  RF  exposure  are  contained  in  the  RF  exposure report.  A summary for one case is shown below:   Frequency: 450 MHz The conducted power output is 12 Watts.  Power out of base station (max.) The coax loss was taken as 1.0 dB.  Antenna gain was taken as 3 dBi 100% Duty Factor Power Density = S= 0.3 mW/cm2  For a transmitter operating with the above criteria the separation distance should be no less than 103 cm or 3.4 ft between the antenna, including any radiating structure, and  any  persons  when  normally  operated.    This  is  for  only  a  single  transmitting carrier; other operating conditions should follow a procedure like that shown in the RF exposure report and following the guidelines such as those in FCC document OET-65.

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