XPM

Priyom ID		Spectrum image
Enigma ID	XPM	No spectrum image available yet
Name:	Middle-pitched polytone
Frequencies:	Various
Status	Inactive
Enigma ID status	Assigned
Voice	N/A
Emission mode	Unknown
Location
Activity pages		No audio sample available yet
Enigma 2000 Control list description	[Russian Intel Multitone System 17+1] Mid Tones (Hz +-3Hz) 450, 488, 531, 568, 611, 649, 692, 730, 773, 811, 854, 891, 934, 972, 1015, 1058, 1096, 1177* *used on longer duration tones only Tone/value relationships :- Still under analysis. Often confused with the Piccolo system.
Known counterpart stations
Family	XP

This is another MFSK with Russian origin.

Tones used are:
450, 488, 531, 568, 611, 649*, 692, 730, 773*, 811*, 854*, 891, 934, 972, 1015, 1058*, 1096*, 1177* Hz

* - tones with longer durations only

Still needs analysis.

Priyom.org