Installation Guide

1-2 BTR 28 GHz Release 1.2
411- 1333 - 202.01.02 Preliminary March 1999
Figure 1-1
BTR 28 GHz Block Diagram
How the BTR 28 GHz Works
This section provides an overview of the theory of operation for the BTR 28
GHz outdoor transceiver.
Its installation on a pole or building enhances transmitting and receiving
capabilities by avoiding the need for long expensive waveguide runs. This
technique minimizes the power loss from waveguide attenuation, which
results in a highly efficient, compact and cost-effective installation.
The high-stability reference oscillator ensures that the transmitter and
receiver remain on frequency over a wide operating range, which results in a
highly efficient, compact and cost-effective installation.
The radio uses a common input cable to carry the 48 VDC and transmit
intermediate frequencies (IFs). The power supply and the IF signals are
separated by the diplexer in the radio. The radio uses a sector antenna for both
the transmit and receive microwave signals.
Antenn
a
Diplexer
P. A m p
LNARX Filter
TX Filter
IF Output
IF/PS Input
DRO
12 VDC
Mixer
Mixer
IF AMP
Modem/Monitor To RSM 9016
IF Test Port
LO Test Port
Power Supply
Dectector
Alarm ÕV GND 12V
To Monitor Board
Dectector