MFJ Multi-mode Data Controller MFJ-1278B User Manual

MFJ-1278B MULTI-MODE SYSTEM MESSAGES
Not found
This message occurs when one attempts to read or kill a non-existent message from an empty
slot. For example if the user issues the command R 30 to read the message in message slot
30, and there is no message in message slot 30.
None found
A parameterless Kill or Read command. The NONE FOUND message occurs when the
MFJ-1278B mailbox is unable to find any messages addressed to the user.
No mail
The No Mail message occurs when a Read command with no slot designator is done, but mail
does not exist for the remote user.
COMMAND MODE ERROR MESSAGES
If you make a mistake typing a command to the MFJ-1278B, an error message will be
printed. You may see any of the following messages depending on the type of error you have
made.
?bad
You typed a command correctly, but the remainder of the command line couldn't be
interpreted.
?call
You entered a callsign argument that does not meet the MFJ-1278B's requirements for
callsigns. A callsign may be any string of numbers and letters, including at least one letter.
Punctuation and spaces are not allowed. The sub-station ID, if given, must be a (decimal)
number from 0 to 15, separated from the call by a hyphen.
?EH
This message occurs when a command issued is not understood by the MFJ-1278B. This will
happen if you are in the mailbox or just during standard operation.
?clock not set
This message appears if you give the command DAYTIME to display the date and time
without having previously set the clock.The DAYTIME command sets the clock if it is given
with the daytime parameters, and displays the date and time if it is given without parameters.
?EH

MFJ Multi-mode Data Controller MFJ-1278B Specifications

General

Type	Multi-mode Data Controller
Model	MFJ-1278B
Interface	RS-232
Power Supply	12 VDC
Modes Supported	Packet, RTTY, ASCII, CW
Frequency Range	HF/VHF
Connectors	DB-9

Summary

INTRODUCTION

COMPUTER INTERFACING

Details connecting the MFJ-1278B to computers via serial or TTL ports.

TERMINAL SOFTWARE REQUIREMENTS

Specifies software requirements for enabling the computer to act as an ASCII terminal.

RADIO INTERFACING

Explains how to connect the MFJ-1278B to radios for operation.

BASIC OPERATION

OPERATIONAL MODES

Guides on changing operating modes using the MODE command and understanding mode codes.

PACKET OPERATION

Covers basic VHF packet operation, including connect/disconnect exercises and digipeating.

PACTOR

Introduces PACTOR operation, its features, and mailbox functionality.

ADVANCED OPERATION

SPECIAL CHARACTERS

Discusses special characters for input editing, flow control, and customizing MFJ-1278B functions.

PACKET OPERATING MODES

Explains Command, Converse, and Transparent modes for packet operations.

Commands Affecting Protocol

Details commands that influence the AX.25 packet protocol operation.

HARDWARE

MFJ-1278B SPECIFICATIONS

Lists the technical specifications of the MFJ-1278B hardware.

RS-232C HANDSHAKING PROTOCOL

Details the hardware handshaking protocol for the RS-232C port.

JUMPER FUNCTIONS

Lists the function and location of various jumpers on the MFJ-1278B mother board.

TROUBLESHOOTING

GENERAL TESTS

Provides basic tests and initial checks for diagnosing MFJ-1278B problems.

SPECIFIC SYMPTOMS

Lists common symptoms and guides for resolving MFJ-1278B issues.