User Manual

Dual Band Repeater Units
Figure 5-2 shows an example of a combined band selective repeater for
dual bands. The repeater part in the cabinet is equipped with an RCC
unit that is used for communication between both the repeater parts via
the R2R feature. This feature can also be used to communicate with other
repeaters, ALR Compact repeaters as well as standard AR repeaters.
Both the BSC boards are used for band selective systems with an
adjustable bandwidth within 890 – 915MHz uplink and 935 – 960MHz
downlink.
If both the repeater parts are linked to the same base station, then the BS
antenna cables are connected to the same antenna via a combiner unit
(CMB). Otherwise separate antenna cabels are used from the repeater to
the antennas.
If both the repeaters cover the same area, then the same thing is
applicable to the MS antenna cables.
Main units: BSC Band Selective Compact board, adjustable bandwidth
CMB Combiner unit, uplink, for RCC antenna
DPX Duplex filter
PSM1 Power Supply unit 1 (in the cabinet)
PSM2 Power Supply unit 2 (in the cover)
RCC Repeater Communication Control unit
ANT
HI LO
ANT
LO HI
ANT
HI LO
ANT
LO
HI
DPX
MS
DPX
BS
PSM1
RCC
BSC
DPX
MS
DPX
BS
BSCPSM2
MS
Mobile station
antenna
BS
Base station
antenna
Downlink
circuitry
Uplink
circuitry
CMB Uplink
Downlink
circuitry
Uplink
circuitry
Figure 5-2. Dual band repeater units
Functional Description ALR Compact Repeater ALLGON Systems AB
5 - 4 Rev. P1D 2000-05 VD203 67/EN - User’s Manual