LESSON TWO
HIGH-LEVEL MODULATION
TASK
Describe the functions performed by the components in a high-level modulator
circuit, differentiate between conventional and hydrogen thyratron circuits,
differentiate
between
conventional
and
thyratron
circuit
operations, determine the width and amplitude of the pulse applied to the
magnetron in a high level modulator circuit, and differentiate between
conventional transformers and pulse transformers.
CONDITION
(Performance-Oriented) Given this subcourse, pencil, and paper.
STANDARD
(Performance-Oriented) Demonstrate competency of task skills and knowledge
by correctly responding to 75 percent of the multiple-choice test covering
radar transmitters.
REFERENCES
FM 11-63
Learning Event 1:
BASIC RADAR TRANSMITTER
1.
General.
Although all components, such as the transmitter, receiver, timer,
and indicator are equally responsible for the efficient operation of a radar
set, much of the effectiveness of a radar set depends upon the transmitter.
The transmitter generates RF energy in short powerful bursts of sufficient
strength to reach all targets within the maximum range of the radar set.
2.
Basic transmitter system.
The major components of a radar transmitter are shown in Figure 52.
The components are the high-voltage power supply, modulator, and magnetron.
The RF system, duplexer, and antenna are additional components needed to
send the RF energy into space and to receive the target echoes.
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