RF / Spectrum Planning

ITU Emission Designator Calculator

Format necessary bandwidth and classify an emission using the ITU Appendix 1 designator system.

Necessary bandwidth

1st symbol · Main carrier 2nd symbol · Modulating signal 3rd symbol · Information 4th symbol · Signal details (optional) 5th symbol · Multiplexing (optional)

ITU emission designator 12K5F3E Bandwidth code 12K5 Classification F3E Expanded optional form 12K5F3E--

Position	Symbol	Selected meaning

Bandwidth is formatted to three significant digits. Enter an already determined necessary bandwidth; Appendix 1 points to ITU-R SM.1138 for bandwidth-determination formulae.

Reverse lookup

Decode a designator

Enter a 7-character ITU designator, or include the two optional symbols. Classification-only codes are also accepted.

Existing emissions designator

Position	Symbol	Meaning