Advertisement
Terminals PCB
12
The Terminals PCB feeds the incoming power and data from the display to the other
assemblies, providing modulator trigger pulses, pulse selection gating, antenna
switching, voltage regulation and tune voltage. The PCB also receives the video from the
Receiver and feeds the signals to the display processor.
Modulator
13
The Modulator provides a high voltage pulsed supply via a pulse width circuit and FET
circuit into a pulse transformer to drive the Magnetron.
RF Head
14
The RF Head contains the Magnetron, Ferrite Circulator, Pulse Limiter and Low Noise
Front End (LNFE). The LNFE comprises an RF Amplifier, Local Oscillator and IF Head
Amplifier.
15
The magnetron energy is fed to the circulator and via the rotating joint to the antenna. The
small leakage of power across the circulator, is fed into the pulse limiter and used by the
LNFE as a tune signal.
16
Return signals from the antenna are fed through the circulator to the limiter and the
LNFE, where they are amplified, mixed and converted to IF levels to interface with the
Receiver main IF.
Receiver
17
The Receiver amplifies and filters the IF from the RF Head and then feeds the signal to an
eight stage logarithmic amplifier which produces the video for the display monitor.
Azimuth PCB
18
The Heading Line and Azimuth data are produced by the interaction between an
opto-interrupter disc and sensors located on the PCB.
Brushless Motor PCB (CAE-A30/8 only)
19
The Brushless Motor PCB provides switching of the 40V supply to drive the motor
within the transceiver/turning mechanism at a constant speed.
+26V Motor Start PCB
20
Provides switching of +26V supply to drive the low speed motor. LK1 is made for
CAE-A30-7.
mkv
5
KH1207
Chapter 1
Amdt 5 (Oct 01)
Advertisement
