Base Station System ND 951
R&S BICK Mobilfunk GmbH
DVers.: 01 / 28.01.99
951_ENG.DOC
Page: 8 / 14
2.4 Booting
Before the device is switched on, the 4-wire short-circuit plugs on the front panel of the installed
transceivers are disconnected, to prevent the MSC/TSC having access to the transceivers while the
adjustments are being carried out. When additional transceivers are installed in a cabinet which is in
service, the 4-wire short-circuit plugs have to be taken off. The system is commissioned by
switching on all mains power supplies. On connection to the power supply all interfaces are reset.
The receiver/transmitter modules and line interfaces go into the operating mode and wait for control
commands from the MMX via 4-wire lines.
Adjusting the CCU
For new installations or changes within a base station, the existing adjustments have to be
readjusted or corrected. For this the PC has to be connected to the V.24-interface of the CCU with a
serial cable. The dialogue with the CCU is carried out by means of a terminal program. The
adjustments are 19200 Baud, N, 8, 1.
If the CCU was barred with the command A900, the base stations can be accessed with the
command A900+. The transceiver addresses are called up with the command Ax (x refers to the
slot).
Further basic Adjustments after the Booting
Further basic adjustments that have to be carried out via the CCU-interface after the first booting of
the ND 951, are described below.
2.4.1 TR-Cassette Configuration
The commands F21-F28 control whether the adjustments concur with the respective transceiver
boards / positions. If, for example, transceivers are mounted in cabinet 1 in the positions 1, 2, and 4,
but none in the other positions, the following command is entered:
F 21 ++-+
The adjustment is only important for the batch command of the CCU.
2.4.2 TX- Antenna Alarm Number
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.
