Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 175)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
COMMAND EXPLANATION
8BITCONV ON/OFF
Mode: Packet Default: OFF
Parameters:
ON
The high-order bit is not stripped in Converse Mode.
OFF
The high-order bit is stripped in Converse Mode.
This command enables transmission of 8-bit data in Converse Mode. If 8BITCONV is OFF,
the high-order bit (bit 7) of characters received from the terminal is removed before the
characters are transmitted in a packet. The standard ASCII character set requires only 7 bits,
and the final bit is used as a parity bit or ignored. Setting bit 7 in text characters transmitted
over the air may cause confusion at the other end.
If you need to transmit 8-bit data, but do not want all the features of Transparent Mode, you
should set 8BITCONV ON and AWLEN 8. This may be desirable, for example, if you are
using a special non-ASCII character set.
Bit 7 is always removed in Command Mode, since commands require only the standard 7-bit
ASCII character set.
8LEVELS ON/OFF
Mode: FAX/SSTV Default: OFF
Parameters:
ON
The MFJ-1278B will transmit and receive FAX and SSTV in 8 gray levels
OFF
The MFJ-1278B will transmit and receive FAX and SSTV in 4 gray levels
In the FAX and SSTV modes, if 8LEVELS is ON, the MFJ-1278B will receive and transmit
FAX and SSTV data in 8 levels of gray. The 8LEVELS command is effective only when
MULTIFAX and TVX are turned ON. With the MULTIFAX and TVX set to OFF, the
MFJ-1278B transmits and receives 2 level FAX and 4 level SSTV regardless of the setting of
the 8LEVELS command. The built-in printer port on the MFJ-1278B does not support
printing of 8 level data, whether it is FAX or SSTV. A Special terminal program, such as
MFJ MultiCom™ must be used to decode and display Multi-level FAX and SSTV.
With 8LEVELS set to OFF, and MULTIFAX and TVX commands set to ON, the MFJ-