SIGNAL SUBCOURSE 324, FM RADIO RECEIVERS
INTRODUCTION
The first step in troubleshooting a receiver is to determine which functions are
not operating correctly. A receiver may receive signals when used with a speaker,
but not with a headset. A receiver may operate correctly on channel 1 but not on
channel 2, or it may operate satisfactorily without squelch, but fail to operate
with squelch.
To determine the probable cause of these malfunctions, you must be thoroughly
grounded in the theory of operation of each stage in the receiver.
This subcourse is written to make you aware of the different types of circuits
used in FM receivers.
This subcourse consists of four lessons and an examination, as follows:
Lesson 1.
Lesson 2.
Mixers, Converters, and Local Oscillators
Lesson 3.
IF Amplifiers, Limiters, and Detectors
Lesson 4.
Special Circuits and Alignment
Examination
Credit Hours: 10
Proponency for
this
subcourse
has
changed
from
Signal
(SS)
to
Missile
and
Munitions (MM).
Texts and materials furnished:
Subcourse Booklet
#TM 11-668, F-M Transmitters and Receivers; September 1952
Corrections to TM 11-668
Examination
1
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