Specifications

Personal Security Data Book |49
• Variable output up to 5 W
• Protection against VSWR
damage
• Synchronizable
• Frequency bands VHF: 25 - 50
MHz, UHF: 409 - 470 MHz
• Galvanic separation between
system earth, antenna earth and
sync. earth
• 12 V power supply output
• Diagnose LED’s
Introduction
The paging transmitters LBB 5868/xx and LBB 5888/xx are
designed for indoor use in a Bosch DP6000 digital paging
system.The output power of the transmitter is variable
between 0.5-5 W. Its aerial output is fully protected against
damage caused by short- or open circuits when
transmitting at maximum ambient temperatures for long
periods of time.Full galvanic separation between system
earth, antenna earth and sync.earth is available during
installation.The transmitter's frequency depends on the
crystal unit used in the transmitter's high frequency section
and should be selected within the range 409-470 MHz.
(LBB5868) or 25-50 MHz (LBB5888).Both transmitter's
can be used in 3 and 4 wire DP6000 systems.
Power supply
An external power supply unit (12 Vdc, 2.5 A) is included
in the delivery of the transmitter.There is also a power
outlet available (12 Vdc,400 mA) that can be used to
supply a central receiver,master sync unit or desk situated
close to the transmitter.
Synchronization LF
If one transmitter VHF or UHF cannot cover the required
transmission area,subsequent transmitters can be installed
in the same system.All transmitters installed in the system
can be synchronized via a pilot frequency from a master
sync unit. An extra pair of wires is required between the
master sync.unit and transmitters to carry the pilot
frequency.
Synchronization HF
The transmitter (VHF only) is also prepared for High
Frequency synchronization.In such a case one transmitter
is used as separate master, where all other transmitters are
used as booster (slaves).Connection between the master
transmitter and slave transmitters is done by coaxial cables.
LED indications
Through the metal plate two LED’s indicate the following:
- Power on (green LED)
- Transmitter on (yellow LED)
Internally 4 diagnostic LED’s are available indicating the
following:
- LF signal
- RF Power OK
- VSWR Error
- LF sync.OK
LBB 5868/xx, 5888/xxx
DP 6000 Paging Transmitter
Communication you can rely on