J3E - Common and Important Examples

Common and Important Examples

N0N

Continuous, unmodulated carrier - as previously commonly used for radio direction finding (RDF) in marine and aeronautical navigation.

A1A

Signalling by keying the carrier directly (aka CW or OOK) - as currently used in amateur radio. This is often but not necessarily Morse code.

A2A

Signalling by keying a tone modulated onto a carrier so that it can easily be heard using an ordinary AM receiver - as used for station idents of some NDB transmissions. This is usually but not exclusively Morse code. (An example of modulated continuous wave)

A3E

AM speech communication - as used for aeronautical VHF communications

F3E

FM speech communication - as used for marine and many other VHF communications

J3E

SSB speech communication - as used on HF bands by marine, aeronautical and amateur users

A3E or A3EG

Normal AM broadcast - as found on public LF and MF bands

F1B

FSK telegraphy, such as RTTY.

F1C

HF Radiofax

F2D

Data transmission by frequency modulation of a radio frequency carrier with an audio frequency FSK subcarrier. Often called AFSK/FM.

J2B

PSK31 (BPSK31)

F8E or F8EH

Normal FM stereo broadcast - as found on public VHF band, and as the audio component of broadcast television transmissions

C3F or C3FN

Broadcast analogue television video signals (previously identified as A5C under the 1976 Radio Regulations)

Note that there is some overlap, so a signal might legitimately be described by two or more designators. In such cases, there is often a traditionally preferred designator.