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MFJ-1278B MULTI-MODE BASIC OPERATION
in idle mode. If you can hear both sides, you can hear the alternate chirps as they are in sync
with each other.
If you operate Mode B or Mode S, then you should have no problems with AMTOR. These
are the broadcast modes and are almost identical to teletype in the way you make contacts.
The whole purpose behind Mode B (FEC) is, making the initial contact. After you make a
contact, you should arrange with your contact to move off the calling frequency to a working
frequency. Moving off the calling frequency is proper etiquette so that way others can then
use the calling frequency for the same purpose. Mode B allows you to make a blanket
broadcast to all stations within range. Think about teletype and you've got the right idea.
One side talks and the other listens, and then the stations change sides. To the ear, mode B
sounds almost identical to teletype. Type FEC to enter Mode B transmit and K to enter
converse mode. It works like teletype, because you transmit 100% of the time while keyed
up.
Mode S is almost identical to mode B, with the exception that it allows several stations to
link in a round-robin type of network between stations. Mode B and Mode S are not
necessarily error free, since there is no acknowledgement from the receiving station.
Mode A, ARQ mode is the mode used by most amateurs, and is sent with no errors once a
link is made between stations. Enter your own AMTOR 4-letter call at the AMTOR prompt
with:
MYSELCAL xxxx <ENTER>
Once you have a frequency selected, at the command line type:
ARQ xxxx <ENTER>
where the xxxx is the selected SELcall of the other station. The status light should remain lit
once a link is established.
Type K followed by the <ENTER> key to enter converse mode.
The MFJ-1278B will transmit all data typed just like you type it on the keyboard. You can
type as long as you like or as long as the other station does not get tired of listening, or the
band fades out. Type +? to transfer control of the link to the other station. Only one station
has control of the link at a time, so try to be considerate. If you want to take control of the
link to send a quick reply you would go back to the a_cmd: prompt and type CHANGE, then
type K to return to converse mode. Type CTRL-C once to take you back to the AMTOR
command line -- a_cmd:. If you make a mistake and type the Ctrl-C twice or more, it will
take you back to the main cmd: line. Type R or QRT at the a_cmd: to terminate the link.
It's usually a good idea to let the other station know before you do though. Think about how
you would feel if he disappeared with no notice!