Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 239)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
MAXSum nn Mode: Pactor Default: 30
Parameters:
nnn: 5<=nnn<=120
MAXSum specifies the number of cycles of error-laden information packets received that
are accumulated in the Digital Memory ARQ sum buffer for reconstruction. When
MAXSUM consecutive information receive errors occur, on the next receive cycle the sum
buffers are re-initialized to inhibit the corruption of real-time reception by historical receive
errors.
MAXUp nnn
Mode: Pactor Default: 10
Parameters:
nnn: 2<=nnn<=48
MAXUp specifies how many consecutive good receptions of 100 baud information packets
are required prior to the MFJ-1278B requests a SPEEDUP to 200 baud. Note that if NO200
is set to ON then a SPEEDUP will not occur because the MFJ-1278B will never request a
SPEEDUP regardless of the MAXUP value. The MAXUP value should be small enough to
enable timely SPEEDUP in relatively good conditions, while being large enough to avoid
pointless speedups during bad conditions.
MBEGIN cccc
Mode: AMTOR Default: <<>>
The MBEGIN parameter, which can be up to 15 characters long, is effective when MATCH
is ON and a mode B signal is being received. When MATCH is ON, the MFJ-1278B will
not print a mode B transmission until the string in MBEGIN is matched.