PSK-10 is a very narrow-band and reliable mode developed by F6CTE. The aim of this experimental slow mode is to allow a chat-type communication between hams.
|
Parameter |
Value |
|
Frequency range |
HF |
|
Operation modes |
Simplex |
|
Modulation |
DBPSK |
|
Shift/Bandwidth |
40 Hz |
|
Symbol rate |
10 Bd |
|
Receiver settings |
DATA, CW, LSB or USB |
|
Input format(s) |
AF, IF |
|
Additional Info |
10.148 MHz, 14.075 MHz |
The baud rate is fixed at 10 Bd and is optimized to transfer the data rate, which an operator can input on a keyboard by hand.
To separate the transferred characters, the sequence "011" is inserted between every character. Thus the characters can be clearly separated, as long as no "011" sequence appears in the character itself. This was taken into consideration when designing the alphabet.
To optimize the data throughput rate of the system, an alphabet with a variable character length is used. For frequently used characters a symbol is used, which has a short word length (as is done with the Huffman compression). This alphabet is called Varicode and differs from the alphabet used in PSK-31.