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MFSK Frequency List
MFSK Center-of-Activity
Join the Olivia Forum:
 Oliviadata Group
Join the MFSK Forum
MFSK Group

MFSK Software
MFSK Frequencies
MFSK Formats
MFSK Frequencies (used by Olivia, MFSK16, PAX, PAX2)
 Digital MFSK communications are becoming popular for text keyboarding in amateur radio because MFSK is one of the most robust methods of text keyboarding that can perform superbly for long distance communications in ionospheric noise conditions where other modes fail. It is possible to communicate worldwide using MFSK with as little as a few watts of transmitter power. MFSK is different from some other types of amateur radio digital keyboarding methods, because it can often be decoded perfectly in the most poor signal-to-noise conditions, even when the human ear cannot discern the presence of the signal, and even when it cannot be easily seen on the conventional waterfall spectrum display. While amateurs are free to roam the band using VFOs, operating on any amateur frequency within the operator's license regulations, "voluntary channelisation" of MFSK frequencies enhances the amateurs' ability to tune and communicate with MFSK using extremely weak signals that would otherwise be missed through searching via VFO tuning. Please see the frequency chart for details. These are a combination of observed, suggested, proposed, and common usage frequencies that are also used by various types of MFSK keyboarding.
MFSK Formats
There are currently 6 Olivia MFSK bandwidth/tone/baud formats, several PAX formats, and several MFSK16 formats. The 2 most common formats for calling CQ or initiating QSOs are: Olivia 500/16 (also called "Average") and Olivia 1000/32 (also called "Standard"). A different format may easily be chosen by the operators after the QSO starts. There are advantages to faster typing with some formats and better decoding with slower formats. Please see the formats chart for details.

MFSK Communication Software Download Links: N1SU Olivia MFSKF6CTE MULTIPSK or here
Story behind the development of Olivia: Pawel Jalocha
MFSK Calling Frequencies
MFSK Center-of-Activity Frequencies

  MFSK Channels, existing and proposed frequencies for finding MFSK QSOs

AMATEUR
BAND
MFSK 500 Hz BW
DIAL Frequency
USB kHz
MFSK 500 Hz BW
Audio Waterfall
Centre Marker
MFSK 1000 Hz BW
DIAL Frequency
USB kHz
MFSK 1000 Hz BW
Audio Waterfall
Centre Marker
160 meters
1808.0
1808.5
1838.0
1838.5
750Hz
750Hz
750Hz
750Hz


80 meters
3582.5
3584.5
750Hz
750Hz
3583.0 (Region 2) 1000Hz
60 meters
5404.25
750Hz

40 meters
7026.0 (Region 3JA)
7037.5 (Region 1; 3)
7038.5 (Region 1; 3)
7072.5 (Region 2)
7076.0 (Region 2)
750Hz
750Hz
750Hz
750Hz
750Hz


30 meters
10138.5
10141.0

10141.5
750Hz
750Hz
750Hz


20 meters
14075.5
14076.0
14076.5
14077.0
14077.5
14078.0
750Hz
750Hz
750Hz
750Hz
750Hz
750Hz
14105.5
14106.5
14107.5
14108.5
Bandplans note:
14101 -14112 kHz
shared with automatic
stations all Regions
1000Hz
1000Hz
1000Hz
1000Hz
17 meters
18103.0
18103.5
750Hz
750Hz


15 meters
21086.5
21087.0
21129.5
750Hz
750Hz
750Hz
21152.5
21153.5
Bandplans note:
21150-21160 kHz
shared with automatic
stations Region 2
1000Hz
1000Hz
12 meters
24921.5
750Hz

10 meters
28076.0
28076.5
750Hz
750Hz


6 meters
50086.5 (Region 1)
750Hz

2 meters
144135.5(Region 1)
750Hz


MFSK Formats
FORMAT
USE
NAME
TONES
AUDIO (Hz)
WATERFALL
CENTER
MARKER
BAND
WIDTH
(Hz)
SPEED
(WPM)
DECODE
S/N RATIO
-dB
BAUD
Olivia*500/16
CQ
"Average"
16
750
500
19.5 13
31.25
Olivia*1000/32
CQ
"Standard"
32
1000
1000
24.4 12
31.25
Olivia 500/8
QSO
"Normal"
8
750
500
29.3 11
62.5
Olivia 1000/16
QSO
"Fast"
16
1000
1000
39.1 10
62.5
Olivia 500/4

"Fast2"
4
750
500
39.1
10
125
Olivia 250/8

"Slow"
8
625
250
14.6
14
31.25
*Common formats for calling CQ or to initiate QSO

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digital selective calling system automatic link establishment


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