Epson MFJ-1278B manual OK Amtor Enter

MFJ-1278B MULTI-MODE BASIC OPERATION

In the case of analyzing a 300 baud signal, the MFJ-1278B will prompt the user that the signal could be PACKET. If this occurs then the user can enter the following command from the cmd: prompt:

OK Packet <ENTER>

The MFJ-1278B will switch to the 300 baud HF packet mode.

If the user just issues the OK command, then the MFJ-1278B will switch to the 300 RTTY or ASCII mode. The number of data bits ASA analyzed, determines if the MFJ-1278B switches into RTTY or ASCII modes. If data bits was 5, then ASA will switch the MFJ-1278B into RTTY mode. If the data bits were 7 ASA will switch the MFJ-1278B into ASCII mode.

If the ASA result is a 100 baud signal, the MFJ-1278B will prompt the user that the signal could be AMTOR. If this occurs then the user can enter the following from the cmd: command prompt:

OK AMTOR <ENTER>

When the "OK AMTOR" command is given the MFJ-1278B will switch to AMTOR mode B. Follow the AMTOR operating procedure to go to any of the other AMTOR modes.

If the user does not issue the "OK AMTOR" command the MFJ-1278B will switch to 100 baud RTTY.

Note that if RTTY or ASCII signals are analyzed, and the user accepted the result (by typing OK) and the MFJ-1278B still does not copying the signal correctly. This may due to the signal being encrypted with bit inversion. Most of the time, two or three bits of the RTTY character may be inverted and it is possible for all 7 bits to be inverted.

If the baud rate and the type of signal has been determined by ASA and the MFJ-1278B still does not copy correctly, the signal may be encrypted with bit inversion. In this case, you may want to try to use the RBitmask command to set various inversion patterns to match the receive signal, but manual setting of the RBitmask command is not necessary. The RBitmask command can be invoked when the MFJ-1278B is in the RTTY or ASCII receive mode by simply issuing the "CTRL-U" while the MFJ-1278B is in converse mode.

Once "CTRL-U" is pressed, MFJ-1278B will automatically cycle through each of the bit combinations, and then display a sample text of each one of the combination on the screen. Examine the list of the displayed text on the screen and if one of the 32 sample text looks normal then make note of the combination number next to the text. Do the following to select this combination:

Press: CTRL-C....to go into the cmd: prompt, then type the number noted above with the