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I
VI
Complete Designation Example:
2
Bandwidth in kllZ-----------
Type of
Transmission
A =AM
F = FM
P
=
PCM
Abbreviations:
AM
= Amplitude Modulation
CW
= Continuous Wave
FM
= Frequency Modulation
(or Phase)
FSK = Frequency Shift Keying
ISB
= Independent Sideband
LSB = Lower Sideband
MCW = Modulated Continuous Wave
PCM = Pulse Coded Modulation
SSB
= Single Sideband
USB = Upper Sideband
DSB = Double Sideband
A
2
H
Purpose·
o
=
No modulation
I = Telegraphy (on-off)
2 :;:; Telegraphy (modulation)
3
=
Telephony
4 = Facsimile
5
=
Television
6 = Duplex Telegraphy
7 = Multichannel Telegraphy
9
=
None of the above
Figure 1-2. International Reception Mode ('odes
Supplementary
Characteristics
A = Single Sideband reduced
carrier
B
=
Two independent sidebands
C
=
Single sideband vestigial
D
=
AM pulse
E = Pulse width modulation
H = Single sideband, full
carrier
J
=
Single sideband,
suppressed ,?arrier
(None)
(None)
=
Double sideband, full
carrier.
. I
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