Epson manual MFJ-1278B MULTI-MODE Basic Operation CW Operation, Procedure

MFJ-1278B MULTI-MODE BASIC OPERATION

CW OPERATION

The MFJ-1278B provides many unique features in the CW mode that are not found in other multi-mode controllers.

The MFJ-1278B can key your CW transceiver in the CW mode of operation. The MFJ- 1278B can accommodate either positive (direct) or negative (grid block) keying voltages.

The MFJ-1278B also has a code practice mode built-in, that can be used with VHF FM radios in the Modulated CW (MCW) mode. This mode holds the radio PTT line down and feeds keyed audio into the microphone input.

The CW mode in the MFJ-1278B is very easy and versatile. Take for instance, the user can send code either from the computer keyboard or a key paddle. The key paddle must be connected to the CW KEY-INjack on the back panel of the MFJ-1278B. When working CW on the MFJ-1278B with a key paddle you have a full fledged Memory Keyer at your disposal. The MFJ-1278B provides the user with ten programmable memory buffers. These memory buffers are able to be programmed with message of up to 120 characters. Besides the buffer memory, MFJ-1278B provides automatic serial numbering. The WEIGHT command determines the DOT/SPACE ratio. This is to allow compensation for leading or trailing edge delays in many transceiver keying circuits. The built in random code generator allows CW code practice. A TUNE command is also built in for radio tuning.

The MFJ-1278B supports all Alpha and Numeric characters. It also will transmit and receive punctuations and major prosigns as listed in Table 4-4 below:

PROSIGNS		ASCII CHARACTER Keyboard Symbol		PROCEDURE
	SK		*	End of Work
	AS		&	Wait
	AR		+	End of Message
	BT		=	Break
	SN		!	Understood
	KA		%	Signal Starting
	K		K	Invitation to Transmit
	DN		/
	KN		(	Response from Contacted Call Only
PUNCTUATIONS
,	COMMA		: COLON
.	PERIOD		; SEMI-COLON
?	QUESTION MARK		' APOSTROPHE
$	DOLLAR SIGN		- HYPHEN
(	LEFT PARENTHESIS		" QUOTATION
)	RIGHT PARENTHESIS