PSK125 et QPSK125

Traduction anglaise.
The new BPSK63 and QPSK63 modes derive from 
BPSK31/QPSK31 but they are four time faster. The minimum ratio Signal-to-Noise ratio is about - 5 dB.

    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 :

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

Creation :
in 2003
Description :
Baud rate :
Speed :
148 wpm in capital letters and 204 wpm in small letters (average)
Bandwidth :
about 320 Hz,
Drift tolerance :
120 Hz/min in BPSK125 and 40 Hz/min in QPSK125 (depending on level)
Lowest S/N :
-5 dB
for the remainder, except the secondary channel, the characteristics are identical to the ones of
BPSK31/QPSK31 modes.

The "secondary channel" specific to Multipsk
There are two sets of characters among 256 ASCII and ANSI characters:

* a first set of 193 characters (the primary  table) is used for the current exchanges,
* a second set of 62 characters (the secondary table") is used to send automatically, in a continue and repetitive way, the following pieces of information "Call", "Name", "Locator", QTH during which nothing is sent, the QSO being in progress. It is a sort of  "intelligent idling". These characters are displayed in a little window.

The idling character, if nothing can be sent, is the character CHR(0).

This secondary channel is interesting because the flow of characters in these modes is very superior to the typing speed. It will permit to Hams listening to rapidly have essential information between typed characters.
See the document "Characters to manage for secondary text on DominoEX FEC, PSK63 and PSK125.doc" on my WEB site ("Specifications") for details.

BPSK125 and QPSK125 (USB)
1838, 3580, 7035, 10140, 14070, 18100, 21080, 24920, 28070, 28120, 50000, 144000 (144605 in France and 144144 in Italy).

Back to the list of modes included in MULTIPSK