Emission Classification

What are they?
Emission classification coding is designed to provide an internationally recognised way of describing the essential characteristics of a radio frequency transmission

How are they written?
Emission codes are usually written in the form XXXX 12345, where;
 * XXXX is used to describe the bandwidth. For example 750H means 750 Hz, and 2K50 means 2.5KHz
 * 12345 is used to describe the other 5 characteristics listed below. Note that characteristics 4 and 5 are optional and are frequently missing from emission codes.


 * 1 Modulation of the main carrier
 * 2 The nature of the signals modulating the main carrier
 * 3 The type of information being transmitted
 * 4 Details of signals
 * 5 Nature of multiplexing

Commonly used Ham Radio emission characteristics
Table 1 - Commonly used emission characteristics