Avionics News December 2022 - 52

series
BY THOMAS INMAN
Receivers and transmitters
Part IV
RCS:
O
ver the last three months, we have defined
radio waves, addressed how they can be
modulated to carry information, and covered
how this information gets to the radio. Now, it is time to
discuss the radios themselves.
Let's begin with four different types of radio receivers
and one AM transmitter. All the receivers have four
things in common. First, receivers can filter in the desired
signals while filtering out undesirable signals. Second,
they amplify the radio signal from the microwatt level
to a level high enough to operate headphones (50 to
100 mW) or a speaker (5W) or provide information to
another device. Third, they will detect the modulation,
thus converting the changing radio signal to a usable
signal in the audio range of frequencies. Forth, receivers
used for radio communications will use automatic gain
control. AGC does as it says - adjusts the gain of the
receiver, automatically, thus preventing strong signals
from overwhelming the amplifiers while still allowing
weak signals to be heard. AGC is why pilots do not need
to adjust the volume constantly as they fly closer to or
farther from a transmitter.
52 avionics news * december 2022
The first on the list of receivers is the simplest. The
direct conversion receiver simply filters and amplifies
the incoming radio signal. Direct conversion receivers
are too simple for aviation radio communications.
Second on the list of receivers is the superregenerative
receiver, which is also rare in today's
communication radios. " Super " is a reference to a
frequency above audio. Regeneration refers to an
oscillation that takes place at the super frequency. In
the past, when electronic parts were expensive, these
receivers would be popular because they would perform
well with a minimum of parts.
A third type of receiver depends on microprocessors
and software. This type is known as a software-defined
receiver. An SDR may include some components of the
other receivers discussed here, or it may simply sample
directly, the radio frequency spectrum. The software will
analyze the patterns of radio frequencies and construct
the appropriate audio output. Keep an eye open for
developments in the SDR field, since these receivers
have the potential to replace the fourth type of receiver
discussed below.

Avionics News December 2022

Table of Contents for the Digital Edition of Avionics News December 2022

Avionics News December 2022 - Intro
Avionics News December 2022 - Cover1
Avionics News December 2022 - Cover2
Avionics News December 2022 - 1
Avionics News December 2022 - 2
Avionics News December 2022 - 3
Avionics News December 2022 - 4
Avionics News December 2022 - 5
Avionics News December 2022 - 6
Avionics News December 2022 - 7
Avionics News December 2022 - 8
Avionics News December 2022 - 9
Avionics News December 2022 - 10
Avionics News December 2022 - 11
Avionics News December 2022 - 12
Avionics News December 2022 - 13
Avionics News December 2022 - 14
Avionics News December 2022 - 15
Avionics News December 2022 - 16
Avionics News December 2022 - 17
Avionics News December 2022 - 18
Avionics News December 2022 - 19
Avionics News December 2022 - 20
Avionics News December 2022 - 21
Avionics News December 2022 - 22
Avionics News December 2022 - 23
Avionics News December 2022 - 24
Avionics News December 2022 - 25
Avionics News December 2022 - 26
Avionics News December 2022 - 27
Avionics News December 2022 - 28
Avionics News December 2022 - 29
Avionics News December 2022 - 30
Avionics News December 2022 - 31
Avionics News December 2022 - 32
Avionics News December 2022 - 33
Avionics News December 2022 - 34
Avionics News December 2022 - 35
Avionics News December 2022 - 36
Avionics News December 2022 - 37
Avionics News December 2022 - 38
Avionics News December 2022 - 39
Avionics News December 2022 - 40
Avionics News December 2022 - 41
Avionics News December 2022 - 42
Avionics News December 2022 - 43
Avionics News December 2022 - 44
Avionics News December 2022 - 45
Avionics News December 2022 - 46
Avionics News December 2022 - 47
Avionics News December 2022 - 48
Avionics News December 2022 - 49
Avionics News December 2022 - 50
Avionics News December 2022 - 51
Avionics News December 2022 - 52
Avionics News December 2022 - 53
Avionics News December 2022 - 54
Avionics News December 2022 - 55
Avionics News December 2022 - 56
Avionics News December 2022 - 57
Avionics News December 2022 - 58
Avionics News December 2022 - 59
Avionics News December 2022 - 60
Avionics News December 2022 - 61
Avionics News December 2022 - 62
Avionics News December 2022 - 63
Avionics News December 2022 - 64
Avionics News December 2022 - Cover3
Avionics News December 2022 - Cover4
https://www.nxtbook.com/allen/avne/60-10
https://www.nxtbook.com/allen/avne/60-9
https://www.nxtbook.com/allen/avne/60-8
https://www.nxtbook.com/allen/avne/60-7
https://www.nxtbook.com/allen/avne/60-6
https://www.nxtbook.com/allen/avne/60-5
https://www.nxtbook.com/allen/avne/60-4
https://www.nxtbook.com/allen/avne/60-3
https://www.nxtbook.com/allen/avne/60-2
https://www.nxtbook.com/allen/avne/60-1
https://www.nxtbook.com/allen/avne/59-12
https://www.nxtbook.com/allen/avne/59-11
https://www.nxtbook.com/allen/avne/59-10
https://www.nxtbook.com/allen/avne/59-9
https://www.nxtbook.com/allen/avne/59-8
https://www.nxtbook.com/allen/avne/59-7
https://www.nxtbook.com/allen/avne/59-6
https://www.nxtbook.com/allen/avne/59-5
https://www.nxtbook.com/allen/avne/59-4
https://www.nxtbook.com/allen/avne/59-3
https://www.nxtbook.com/allen/avne/59-2
https://www.nxtbook.com/allen/avne/59-1
http://www.brightcopy.net/allen/avne/58-12
http://www.brightcopy.net/allen/avne/58-11
http://www.brightcopy.net/allen/avne/58-10
http://www.brightcopy.net/allen/avne/58-9
http://www.brightcopy.net/allen/avne/58-8
http://www.brightcopy.net/allen/avne/58-7
http://www.brightcopy.net/allen/avne/58-6
http://www.brightcopy.net/allen/avne/58-5
http://www.brightcopy.net/allen/avne/58-4
http://www.brightcopy.net/allen/avne/58-3
http://www.brightcopy.net/allen/avne/58-2
http://www.brightcopy.net/allen/avne/58-1
http://www.brightcopy.net/allen/avne/57-12
http://www.brightcopy.net/allen/avne/57-11
http://www.brightcopy.net/allen/avne/57-10
http://www.brightcopy.net/allen/avne/57-9
http://www.brightcopy.net/allen/avne/57-8
http://www.brightcopy.net/allen/avne/57-7
http://www.brightcopy.net/allen/avne/57-6
http://www.brightcopy.net/allen/avne/57-5
http://www.brightcopy.net/allen/avne/57-4
http://www.brightcopy.net/allen/avne/57-3
http://www.brightcopy.net/allen/avne/57-2
http://www.brightcopy.net/allen/avne/57-1
http://www.brightcopy.net/allen/avne/56-12
http://www.brightcopy.net/allen/avne/56-11
http://www.brightcopy.net/allen/avne/56-10
http://www.brightcopy.net/allen/avne/56-9
http://www.brightcopy.net/allen/avne/56-8
http://www.brightcopy.net/allen/avne/56-7
http://www.brightcopy.net/allen/avne/56-6
http://www.brightcopy.net/allen/avne/56-5
http://www.brightcopy.net/allen/avne/56-4
http://www.brightcopy.net/allen/avne/56-3
http://www.brightcopy.net/allen/avne/56-2
http://www.brightcopy.net/allen/avne/56-1
http://www.brightcopy.net/allen/avne/55-12
http://www.brightcopy.net/allen/avne/55-11
http://www.brightcopy.net/allen/avne/55-10
http://www.brightcopy.net/allen/avne/55-9
http://www.brightcopy.net/allen/avne/55-8
http://www.brightcopy.net/allen/avne/55-7
http://www.brightcopy.net/allen/avne/55-6
http://www.brightcopy.net/allen/avne/55-5
http://www.brightcopy.net/allen/avne/55-4
http://www.brightcopy.net/allen/avne/55-3
http://www.brightcopy.net/allen/avne/55-02
http://www.brightcopy.net/allen/avne/55-01
http://www.brightcopy.net/allen/avne/54-12
http://www.brightcopy.net/allen/avne/54-11
http://www.brightcopy.net/allen/avne/54-10
http://www.brightcopy.net/allen/avne/54-9
http://www.brightcopy.net/allen/avne/54-8
http://www.brightcopy.net/allen/avne/54-7
http://www.brightcopy.net/allen/avne/54-6
http://www.brightcopy.net/allen/avne/54-5
http://www.brightcopy.net/allen/avne/54-4
http://www.brightcopy.net/allen/avne/54-3
http://www.brightcopy.net/allen/avne/54-2
http://www.brightcopy.net/allen/avne/54-1
http://www.brightcopy.net/allen/avne/53-12
http://www.brightcopy.net/allen/avne/53-11
http://www.brightcopy.net/allen/avne/53-10
http://www.brightcopy.net/allen/avne/53-9
http://www.brightcopy.net/allen/avne/53-8
http://www.brightcopy.net/allen/avne/53-7
http://www.brightcopy.net/allen/avne/53-6
http://www.brightcopy.net/allen/avne/53-5
http://www.brightcopy.net/allen/avne/53-4
http://www.brightcopy.net/allen/avne/53-3
http://www.brightcopy.net/allen/avne/53-2
http://www.brightcopy.net/allen/avne/53-1
http://www.brightcopy.net/allen/avne/52-12
http://www.brightcopy.net/allen/avne/52-11
http://www.brightcopy.net/allen/avne/52-10
http://www.brightcopy.net/allen/avne/52-9
http://www.brightcopy.net/allen/avne/52-8
https://www.nxtbook.com/allen/avne/52-7
https://www.nxtbook.com/allen/avne/52-6
https://www.nxtbook.com/allen/avne/52-5
https://www.nxtbook.com/allen/avne/52-4
https://www.nxtbook.com/allen/avne/52-3
https://www.nxtbook.com/allen/avne/52-2
https://www.nxtbook.com/allen/avne/52-1
https://www.nxtbook.com/allen/avne/51-12
https://www.nxtbook.com/allen/avne/51-11
https://www.nxtbook.com/allen/avne/51-10
https://www.nxtbook.com/allen/avne/51-9
https://www.nxtbook.com/allen/avne/51-8
https://www.nxtbook.com/allen/avne/51-7
https://www.nxtbook.com/allen/avne/51-6
https://www.nxtbook.com/allen/avne/51-5
https://www.nxtbook.com/allen/avne/51-4
https://www.nxtbook.com/allen/avne/51-3
https://www.nxtbook.com/allen/avne/51-2
https://www.nxtbook.com/allen/avne/51-1
https://www.nxtbook.com/allen/avne/50-12
https://www.nxtbook.com/allen/avne/50-11
https://www.nxtbook.com/allen/avne/50-10
https://www.nxtbook.com/allen/avne/50-9
https://www.nxtbook.com/allen/avne/50-8
https://www.nxtbook.com/allen/avne/50-7
https://www.nxtbook.com/allen/avne/50-6
https://www.nxtbook.com/allen/avne/50-5
https://www.nxtbook.com/allen/avne/50-4
https://www.nxtbook.com/allen/avne/50-3
https://www.nxtbook.com/allen/avne/50-2
https://www.nxtbook.com/allen/avne/50-1
https://www.nxtbook.com/allen/avne/49-12
https://www.nxtbook.com/allen/avne/49-11
https://www.nxtbook.com/allen/avne/49-10
https://www.nxtbook.com/allen/avne/49-9
https://www.nxtbook.com/allen/avne/49-8
https://www.nxtbook.com/allen/avne/49-7
https://www.nxtbook.com/allen/avne/49-6
https://www.nxtbook.com/allen/avne/49-5
https://www.nxtbook.com/allen/avne/49-4
https://www.nxtbook.com/allen/avne/49-3
https://www.nxtbook.com/allen/avne/49-2
https://www.nxtbook.com/allen/avne/49-1
https://www.nxtbook.com/allen/avne/48-12
https://www.nxtbook.com/allen/avne/48-11
https://www.nxtbookmedia.com