User's Manual
Overview High Power Wideband Radio Head (WRH-V)
1-4 044-05251 Rev B
Chassis Design
The WRH-V is housed in a cast aluminium waterproof chassis, class NEMA4 / IP65, approved for outdoor use
but is also suited for indoor installations. The chassis consists of a cabinet and a cover attached with hinges.
The cabinet contains the WRH-V circuitry. The cover comes as either a low or high version. The high cover can
be used as an empty cover or be equipped as a part of the WRH-V or an independent WRH-V unit. A WRH-V
with a high cover that is equipped as two independent units can, for example, be equipped for channel selective
operation in the cabinet and band selective operation in the cover.
Inside the WRH, a number of amplifier PCBAs are individually shielded and located under a metal cover that
can be opened outward. These PCBAs are of different types depending on the supported system.
Sub Unit Overview
A number of amplifier PCBAs are individually shielded and located under a metal cover inside the WRH-V. This
cover can be opened outward for access. These amplifier PCBAs are of different types depending on the
supported system. All of the WRH-Vs are built up with a number of sub units which are described in the
following sections.
Wideband Amplifier PCBA (WBA)
WRH-Vs can handle multiple carriers over a wide ba
nd. Each band requires one WBA for the uplink and
downlink, and one associated PA or MCPA for the downlink. The cabinet can be equipped with up to two WBAs
along with two PAs supporting two bands or one MCPA supporting one band. Positions 1 and 3, shown in
Figure 1-6, are assigned for a WBA.
Multi-Carrier Power Amplifier PCBA (MCPA)
The MCPA is used to amplify the output signal from the
WBA. Each MCPA can handle one band in the downlink
direction. It requires an extra heat sink element on the outside of the cabinet or high cover to dissipate the heat
generated. The MCPA occupies positions 2 through 4 in the cabinet and 6 through 8 in a high cover, as shown
in Figure 1-6.
Distribution PCBA (DIA)
The DIA is the core distribution PCBA to which all othe
r PCBAs and units connect in the cabinet with the
exception of the PA. Figure 1-2 shows a DIA PCBA. A shielded metal frame on the DIA provides the mounting
location for the CU, ALI and RCIs, if used.
Figure 1-2 DIA PCBA
ALLGON INNOVATION
SWEDEN M105 R6
1
PARKING
FOR W5
W5
8
P27
W6B 10
1
P33
ALARM
P23
LNA
UP-LINK
P32
MODEM
A
U
X
1
P28
DOOR
5
9
6
1
1
16
1
1
M
-
>
S
P11
P34
8
9
15
P26
15 16
S
-
>
M
1
2
3
89
P
3
6
5
X0A
X0B
2
V2
1
16
P12 P13
1
1
1
16
16
16
P4
P5
P6
c
b
a
c
b
a
c
b
a
c
b
a
1P232
1
b
a
1
16P3
16
1
16
P14
1
V1
1
1
1
1
1
4
6
1
15
6
9
15
2
16
1
2
4
5
8
5
P35
P21
PSU
6
10
P31
PC
P29
P24
P25
GND
7
6V6
LNA
DOWN-LINK
LED
P22
1
2
V6B
P27
P26
P23
XOA
XOB
P28
P4 P5 P6 P2 P3 P31 P21 P35 P33
P32
P11 P12 P13 V1P14 P22P29P34 V2P36
V6
GND
P25
P24