R&S BICK Mobilfunk GmbH Base Station System ND 951 Contents 1 General Information ........................4 1.1 Scope of Delivery........................4 1.1.1 4-Channel Fitting-Out ......................4 1.2 Requirements ........................... 4 1.2.1 Security Regulations ......................4 1.2.2 Local Requirements......................5 1.3 Function Profile......................... 5 1.4 Aids / Measuring Instruments ....................
MMX compact system. 1.1.1 4-Channel Fitting-Out The system ND 951 consists of 4 transceivers XD 951, a TX band pass filter, an RX band pass filter, a TX-combiner, a receiver multicoupler, a frequency reference, power supply units, and a control unit CCU.
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.
2.2 Hardware Adjustments (Jumper) The ND 951 has a wide range of control software, so that it is not necessary to adjust the jumpers during the installation and commissioning. Exceptions are the mains power supplies PS914DC and PS928DC that are switch-selectable from either 48V (48-55V) or 60V (56-72V).
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.3.3 220 V Main Connection The cabinet is connected to 220V by taking the power cable 2 through the square opening at the rear of the top panel to the connection box at the front. For this, the protection grids at the top panel and the front panel have to be removed.
The adjustment of the TX antenna number of the used cassette is controlled and changed with the commands F41-F48. These are: F41/1 F42/1 F43/2 F44/2 F45/3 F46/3 F47/4 F48/4 For the compact system ND 951 only the adjustment F41/1 is used. DVers.: 01 / 28.01.99 951_ENG.DOC Page: 8 / 14...
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.4.3 RX Multicoupler Alarm Number The adjustments for the receiver multicoupler alarm for the used cassette are set with the commands F51-F58. These are: F51/1 F52/1 F53/1 F54/1 F55/2 F56/2 F57/2 F58/2 For the compact system ND951 only the adjustment F51/1 is used.
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.4.7 Adjusting the Transceiver If all transceivers that are connected to the CCU are to be adjusted at the same time, the batch command of the CCU can be used. The following is put at the beginning of all commands:...
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.4.12 Alarm from the Reference Frequency If only one reference frequency is installed, and the block alarm is to be triggered off in case inaccuracies occur, the following has to be entered:...
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.4.16 Storing of Channels The channels of each transceiver are stored with the following command: 30/nnnn 30/EE++++ For this, mm is the CCU address of the transceiver and nnnn is the transceiver channel number.
R&S BICK Mobilfunk GmbH Base Station System ND 951 2.4.19 Final Commissioning of the System All 4-wire short-circuit plugs of the transceivers are connected to the two top rows of the plug-in connection on the front panels. Finally a local deblock is activated with the command: B/01- Now the MMX can commission the base stations.
R&S BICK Mobilfunk GmbH Base Station System ND 951 Literature The following documents can be used as reference: Literature 1 Installation and Commissioning LIA-400 - 90LIA400IN02 ® Literature 2 Overlay Documentation ACCESSNET especially ® Interface DOC ACCESSNET CHN-Overlay - 90ACN15EDO26...
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