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MFJ-1278B MULTI-MODE BASIC OPERATION
PACTOR ARQ
For ARQ operation you will need to know the other person's callsign. Normally you can get
the other person's call by monitoring the channel for connect requests or other ARQ contacts.
To establish contact with another station, you must be at the p_cmd: prompt. To initiate a
connect sequence, please type the following:
C n <ENTER>
where n is the CALLSIGN of the station you want to connect with. The callsign is not to be
over eight characters in length. Again, properly tune the radio, because you will immediately
start transmitting packets.
When a station is over 40,000 Km away, the LC command should be used. The LC is the
abbreviation for Longpath Connect. To initiate a Longpath Connect sequence, please type
the following:
LC n <ENTER>
where n is the CALLSIGN of the station you want to connect with. Callsigns are not to be
over 8 characters in length. Again properly tune the radio, because you will immediately start
transmitting packets. If the C command does not work, the LC command might. Generally,
if one command works the other will not.
Changeover
In AMTOR the changeover (from TX to RX) command is +?. In PACTOR the changeover
command is CTRL-Y, i.e, hold down the CTRL key then press the Y key. The changeover
character can be re-defined with the CHOCHAR command. How the CHOCHAR character
is re-defined will discussed later. When in Pactor Mailbox operations, the changeover is
semi-automatic. The remote user must issue a manual changeover, CTRL-Y, when talking
to the Pactor Mailbox. The Pactor Mailbox always issues an automatic changeover, when it
is finished sending its information back to the remote user.
To terminate an ARQ contact, type CTRL-C, then D, then <ENTER>. This will cause a
graceful disconnect at the other end. If you do a "dirty disconnect" or DD, the other Station
will still be trying to acknowledge your packets. The use of DD automatically tears down the
contact and does not wait for acknowledgments from the other station. The use of the DD
command is considered bad manners. Always do a D disconnect, if possible.
Monitoring
While in the PACTOR mode, you are always in Listen mode. There is no listen command in
the Pactor protocol. Therefore you do not need to issue listen command just to listen on a
PACTOR frequency. To monitor a PACTOR conversation, just tune the signal in until the