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MFJ-1278B MULTI-MODE BASIC OPERATION
After selecting the desired FAX mode, type K to leave command mode and enter the
CONVERSE mode. Once in CONVERSE mode the MFJ-1278B is in standby-receive mode.
This means that the MFJ-1278B is listening to the radio for the distinctive "tic-tic" that
indicates the synchronization period at the beginning of a picture. If the MFJ-1278B hears
the "tic-tic" well enough, it will establish a lock onto the signal and start printing to the
printer. The printer will print upon each scan of the FAX picture.
The MFJ-1278B's built-in LOCK feature detects the beginning of each picture before
starting to print. This insures each picture will be printed from top to bottom. If you want
the printer to start to print in the middle of the picture, you may force a lock on the picture
and the printer will begin to print upon the "force lock". To force a lock, you simply type the
letter L while in the FAX standby-receive mode.
The LOCK detect feature on the MFJ-1278B is effective for FAXMODE 3. For other
FAXMODEs, you will want to force a LOCK at the beginning of the picture to insure proper
printing.
If the FAX picture appears to be printed shifted to the right, you can type the "<" key to shift
the picture to the left. Each repetition of the "<" key will shift the picture 1/10" to the left.
To shift the picture to the right, use the ">" key. Each repetition of the ">" key will shift the
picture to the right 1/10". For example, if you needed to shift the picture to the left 1 inch,
you would press the "<" key ten times. The picture can be shifted to the right or left at any
time during printing.
If your picture is elongated horizontally or vertically, you can correct this by setting the
ASPECT ratio. ASPECT is used to establish a reasonable aspect ratio between the horizontal
and vertical presentation of FAX graphics. ASPECT ratio can be set between 2 thru 8, with 2
being the optimum aspect ratio for weather FAX. The default ASPECT ratio of the MFJ-
1278B is 3. The ASPECT ratio can be set by using the command ASPECT followed by a
number from 2 thru 8. If you find that your picture seems to be elongated horizontally, you
should decrease the value of aspect. If the picture is elongated vertically, you should increase
the aspect value.
If you notice spaces in the printed picture, you should set GRAPHLF to OFF. The
GRAPHLF command determines whether the MFJ-1278B will issue a line feed before the
carriage return on every line of graphics. The GRAPHLF command defaults to OFF. For
most printers GRAPHLF should be set to ON.
If the printed picture appears to be slanted to the left or to the right, this indicates that the
master CPU clock on the MFJ-1278B may not be in frequency with the transmitting signal.
To correct this problem, you will need to remove the cover of the MFJ-1278B and adjust the
white capacitor trimmer,
C47
. This adjustment does not require any spec
ial equipment.