Traduction anglaise.

  PSK10 mode is designed to assure communications with weak ratio Signal-to-Noise ratios down to -17.5 dB with less than 2% errors. The speed is 18 wpm. This mode is very sensitive to the ionospheric Doppler modulation.

Click on the copy of the screen in order to listen to the corresponding audio signal.

    This mode is included into the software MULTIPSK by Patrick F6CTE, there is the description of this mode and its variants as well as the specifications coming from his software :

Created by: Patrick Lindecker F6CTE (2001)
Description :
Baud rate :
Speed :
18 wpm
Modulation :
Reception mode :
indifferent (LSB or USB)
Character set :
56 "Varicode" characters " A..Z 0..9  <CR> <ESPACE> . , " : - = + ? $ ' ( ) ! / @ & # * with an error reset character and an idle character (displayed by ">").
Small characters are transformed in capital characters and special characters as
" é " are transformed in standard capital (in the example above: " E ").

Shape of pulse :
rectangular but the transition between 2 successive different bits is done by a             decreasing sine then by an increasing sine (each one during a quarter of period)
Bandwidth :
about 40 Hz
Demodulation :
Synchronization :
automatic using the signal
Correction code :
Convolution code :
Interleaving :
Repetition :
Drift tolerance :
40 Hz/mn (depending on signal-to-noise ratio)
Pmean/Ppeak :
Lowest S/N :
-17.5 dB
For precise specifications about PSK10, see the PSK10.DOC file.

Recommanded frequencies for PSK10 (USB)

These modes (expect PSK220F) like PSK10 as well as PSKFEC31, PSK63F +DIGISSTV "Run", PSKAM10/31/50 are QRP transmissions and they are used very little, Patrick F6CTE proposes to focus calls at the following frequencies and times :

*   14075 Khz USB (AF around 1000 Hz) at 17h00 UTC,

*   10148 kHz USB (AF around 1000 Hz) at 22h00 UTC.

* 144620 kHz USB (AF around 1000 Hz) at 20h00 UTC.

A CW prefix, at 12 or 20 wpm,  indicating mode, software and power used, for example: "VVV DE F6CTE / MODE PSK10 / SOFT MULTIPSK / PWR: 5 WATTS" could be transmitted before the CQ call itself. The  option of the video identifier of mode,  now included in MULTIPSK,  permits to specify visually in CMT Hell  the mode label (and/or other information) before the main transmission. This identifier will be visible in the "waterfall" of the other Ham. For example, just before the general call ("CQ") in PSK10, it will be sent automatically  "PSK63F" in CMT Hell. The other Ham will see "PSK63F" displaying on his "waterfall" and will switch immediately to PSK10.

Back to the liste of modes included in MULTIPSK