Epson MFJ-1278B manual Changeover, Monitoring

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