BSC Band Selective Compact Board
The compact band selective repeater is built up mainly on a single BSC
board that contains all the amplification circuitry for uplink and downlink
and the control circuitry. This board contains also all the ports for alarm,
local control, remot control, etc.
Figure 5-3 shows the BSC board in the compact repeater.
The left upper part of the BSC board contains the downlink circuitry. The
downlink signal path starts from port P126, is fed to the LNA, Low Noise
Amplifier, then it passes a number of amplifiers, and is finally fed to the
PA, Power Amplifier before it is fed, via port P128, to the DPX/MS
HI port to be forwarded to the MS antenna.
The right upper part of the BSC board contains the corresponding
circuitry for the uplink signal path, from port P122, via port P121,
DPX/BS HI port and to the BS antenna.
ANT
HI
LO
ANT
LO
HI
DPX
MS
DPX
BS
P126
P127
P122
P123
P128
P121
P131
P119 P120
P112
P118
P124
P118
LNA/DL
PA/DL
LNA/UL
PA/UL
P130
P111
P115
P113
Figure 5-3. BSC, Band Selective Compact board
ALLGON Systems AB
ALR Compact Repeater
Functional Description
VD203 67/EN - User’s Manual
Rev. 1A 2000-07
5 - 9
