Installation Guide

1-8 BTR 28 GHz Release 1.2
411- 1333 - 202.01.02 Preliminary March 1999
Low Noise Amplifier
The low noise amplifier (LNA) provides gain in the receive path and
amplifies the received microwave signals to the mixer. The gain and noise
figure of the LNA are chosen to maximize the overall dynamic range and
noise performance of the BTR 28 GHz receiver section.
IF Amplifier
The IF amplifier provides gain in the downconverted received signals to the
required level. It uses a VHF amplifier with 50 Ohms input and output
impedance.
Power Amplifier
The power amplifier provides gain in the transmit path. It boosts the signals in
the 27.5485-27.7485 GHz frequency range to the required level. The
amplifier is a solid state amplifier that has high linearity within a high output
power range.
Remote Monitor
The remote monitor unit provides an interface for remotely monitoring the
BTR 28 GHz. The unit communicates with the RSM 9016 by way of a
shielded twisted pair wire cable. An operator can remotely measure and
monitor RF output power (0 to 27 dBm), DRO phase voltage (0 to 10 volts),
DRO phase lock alarm (0, 1), internal temperature (-40 to +80°C) and power
supply voltage (12 volts). Refer the Reunion Redundancy Switching Matrix
Installation Guide, 411-1313-201, Maintenance Release and the Reunion
DSS 1000 (Digital System Supervisor) User Manual, 411-1343-500.
Antenna
The BTR 28 GHz uses a sector antenna for transmitting and receiving RF
signals. Physically, the antenna consists of two horns. One horn is connected
to the transmit side and the other one is connected to the receiver RF input.
The antenna is shipped either vertical-vertical (Tx-Rx) or horizontal-
horizontal.
Note: Lightening arrestors are not supplied with the BTR transceiver.