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unknown digital signal. what is this mode?

Feb 10th, 09:44

AB8O

Joined: Dec 14th 2005, 10:13
Total Topics: 0
Total Posts: 0
I've noted an unknown (to me) signal several times in the FT8 band region: about 250 Hz wide with 8 channels, each about 10 Hz wide.
I've seen it on 40M and 20M. What is this mode?
73, John. AB8O
Feb 10th, 12:39

W1VT

Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
https://en.wikipedia.org/wiki/Olivia_MFSK
Olivia modes are commonly referred to as Olivia X / Y (or, alternatively, Olivia Y / X ), where X refers to the number of different audio tones transmitted and Y refers to the bandwidth in hertz over which these signals are spread. Examples of common Olivia modes are 16/500, 32/1000 and 8/250.

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