SPECIAL INSTRUCTIONS FOR ELECTRONIC SUBSYSTEMS 5-25 E UROCARGO Euro 4/5 Figure 5.12 1. Location of the transceiver equipment for CB (City Band) Transceiver systems for Mobile Phones GSM/PCS/UMTS The installation of mobile phones and appliances must use the supply system already set up on the vehicle, making the connection to terminal 30 via an additional fuse. This equipment must be type approved according to the law and be the fixed type (not portable). Install the transmitting part in a flat and dry zone separated from the electronic components of the vehicle sheltered from moisture and vibration.
• The value of the SWR must be as near as possible to unity, the recommended value is 1.5 while the maximum acceptable value must ion no case be greater than 2. • The values of the ANTENNA GAIN must be as high as possible and assure a sufficient characteristic of spatial uniformity, char- acterized by deviations from the mean in the order of 1.5 dB in the 870-960 MHz band and 2 dB in the 1710-1880 MHz band. • The value of the RADIATED FIELD IN THE CAB must be as low as possible, as a quality objective we recommend In any case the limits set by the current European directive must not be exceeded.
• For this reason , the antenna must always be installed outside the vehicle cab, preferably on a large metal base fitted as vertically as possible with the connecting cable turned downwards, observing the assembly prescriptions and the instructions of the manu- facturer. An optimal location of the antennas is the front of the cab roof at a distance of no less than 30 cm from other antennas. Electrical system: modifications and drawing-off power Print 603.93.431 Base - January 2008 124450