Nortel CTR 38 GHz Installation Manual page 15

1. The CTR transceiver's input coaxial cable carries the IF signals and the 18
VDC power supply to the diplexer. The diplexer distributes the DC power
to the power supply unit and interfaces with the mixer for the IF signals.
2. The 450-650 MHz transmit IF signals enter the mixer which upconverts
the signals to the 38.75 to 38.95 GHz band for the transmit path. The
received 39.45 to 39.65 GHz RF band is downconverted to a receive
signal in the 50-250 MHz range.
3. The local oscillator (LO) provides local oscillator signal to the mixer. The
LO uses a phase-locked dielectric resonance oscillator (DRO) with an
oven controlled crystal oscillator (OCXO).
4. The bandpass filters remove the undesired sideband signals, in both the
transmit and receive paths.
5. The upconverted signal is fed into the power amplifier which provides the
required gain to the microwave signals. The power amplifier output is
connected to the antenna through the filter and duplexer.
6. The received RF simultaneously passes through the antenna, the band
pass filter, the Low Noise Amplifier (LNA), and enters the downconverter
mixer.
There are three connectors on the outside of the transceiver case:
• The IF (TX) and power supply input uses a Type N female jack
• The IF (RX) output uses a Type N female jack
• Test Port uses SMA jack
CTR 38 GHz Release 1.2 1-3
Reunion CTR 38 GHz Installation Guide