How The Ctr 38 Ghz Works - Nortel CTR 38 GHz Installation Manual

1-2 CTR 38 GHz Release 1.2
Figure 1-1
CTR 38 GHz Block Diagram
18 VDC
IF/PS Input
Power Supply
12 VDC
DRO
LO Test Port
IF Output
VHF-AMP

How the CTR 38 GHz Works

This section provides an overview of the theory of operation for the CTR 38
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. Minimum
maintenance is required.
The high-stability reference oscillator ensures that the transmitter and
receiver remain on frequency over a wide operating range.
The radio uses a common input cable to carry the 18 VDC and transmit
intermediate frequency (IF) signals. The DC power supply and the IF signals
are separated by the diplexer in the radio. The radio uses a common antenna
for both the transmit and receive microwave signals.
411-1333-205.01.02 Preliminary March 1999
Diplexer
Mixer
Mixer
TX Filter P. Amp.
RX Filter LNA
TX Filter
Antenna
Duplexer
RX Filter