Base Station System ND 951
R&S BICK Mobilfunk GmbH
DVers.: 01 / 28.01.99
951_ENG.DOC
Page: 5 / 14
Attention!
All supply lines have to be laid or installed so that
•
they don’t obstruct the operation of the device,
•
the user will not trip over them,
•
the minimum distances are taken into consideration.
1.2.2 Local Requirements
For trouble-free operation of the system a closed dry room is required. The room temperature has
to range between -20 and +50 degrees centigrade. The electrical mains supply must be 220V/ 50Hz
AC or 48-72V DC. Regardless of the protective grounding of the electricity mains supply a general
separate grounding for the device has to be made.
1.3 Function Profile
The receiver/transmitter system ND 951 is used for the transmission of information via an air
interface which connects up the users of the trunked radio system, the functional units of the
trunked radio system and its users.
To provide these functions, the ND 951 has the following basic functions:
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Connection for 4-wire lines for the internal coupling to the exchange
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Receiver/transmitter modules
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Self-test facilities
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Antenna connection modules for receivers and transmitters
1.4 Aids / Measuring Instruments
For activating the ND 951 the following measuring instruments and aids should be available:
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Multimeter (commercially available)
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HF-measuring console (CMS, FMP-3)
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Power meter (NAS)
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PC or laptop with terminal program and serial cable
•
Tools
1.5 Lines / Connections
The following lines/connections have to be available:
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Grounding
Separate groundings with a cross-section of at least 16 mm² have to be laid out for the system.
•
Power Supply
Connections to the electricity mains supply of AC 220V50Hz or DC 48-72 V.
•
Antenna connections
50-Ohm-technology antenna connections are required.
