User's Manual

PCBA Connections AR Standard Repeater
044-05250 Rev A 2-7
LNA
Figure 2-5 illustrates the LNA and Table 2-8 lists the connectors and connections. All coaxial
connectors are SMA-type. Signals from the DPX output are fed to the LNA input connector
IN. OUT1 and OUT2 outputs feed the CHE, CSA or BSA of the same signal direction.
The signal level in these connectors are +20dB referenced to the antenna input. OUT LOW is
an expansion output for an additional LNA if the repeater is equipped in a high cover. The
gain to this connector is +2dB. The +7V input is used for +7V supply from the DIA PCBA and
ATT is a control signal for a controllable attenuator in the LNA.
Figure 2-5 Low Noise Amplifiers
Table 2-8 Low Noise Amplifier Connections
Not used outputs do not need to be terminated.
LNA/UL Port Connected to
OUT LOW IN on the LNA/UL in the cover, if equipped
IN LO on the service DPX duplex filter.
ATT +7V P23 on the DIA PCBA.
OUT1 P101 on the CHE3/UL, CSA/UL, or BSA/UL PCBA. P2101 on the
WBA PCBA.
OUT2 P101 on the CHE4/UL channel PCBA.
LNA/DL Port Connected to
OUT LOW IN on the LNA/DL in the cover, if equipped
IN HI on the donor DPX duplex filter.
ATT +7V P24 on the DIA PCBA.
OUT1 P101 on the CHE2/DL, CSA/DL, or BSA/DL PCBA. P2102 on the
WBA PCBA.
OUT2 P101 on the CHE1/DL channel PCBA.
WARNING: Some LNA power transistors may contain beryllium oxide (BeO) that is poi-
sonous. Refer to the Safety section in Chapter 1
OUT
LOW
IN+7V ATTOUT1 OUT2
LNA
DL
OUT
LOW
IN ATT +7V OUT2 OUT1
LNA
UL