User's Manual

BTR 38 GHz Release 1.2 1-7
BTR 38 GHz Installation Guide
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 38 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 39.45-39.65 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 38 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, the Reunion DSS 1000 (Digital System
Supervisor) User Manual, 411-1343-500, and the Reunion DSS 1000 for the
NIU 6054 User Guide, 411-1343-502.
Antenna
The BTR 38 GHz uses a sector antenna for transmitting and receiving RF
signals. Physically, an antenna unit, which interfaces to the radio, contains
two sector antennas (one for transmit and one for receive). The antenna unit is
either horizontally or vertically polarized. One antenna port 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.