PACTOR-FEC is a bit synchronous simplex system and is based on PACTOR.
|
Parameter |
Value |
|
Frequency range |
HF |
|
Operation modes |
Broacast, FEC |
|
Modulation |
FSK |
|
Symbol rate |
100 and 200 Bd |
|
Shift |
200 Hz |
|
Receiver settings |
DATA, CW, LSB or USB |
|
Input format(s) |
AF, IF |
|
Additional Info |
ITA-5 with block coding |
The PACTOR-FEC data block consists of three sections: Header, data and control (status and 16 bit CRC). At 100 Bd the data field is 64 bits and at 200 Bd it increases to 160 bits. Block coding is performed according to the CCITT standard starting with the data section.
In contrast to PACTOR, all data blocks are in consecutive order with no or little space between them. They are several variants on the market. The baud rate is fixed to 100 or 200 Bd. PACTOR-FEC is used for broadcast transmission and is recognized by the FSK Code Check or Classifier Code Check.