Timewave DSP-232, Operating Manual, Page: 204 / 271

Chapter 11 SIAM and NAVTEX Operation
ARQ-E is similar to 1-channel TDM except that the 7-bit code is different. Like TDM, most ARQ-E stations send
idle signals for long periods of time. The DSP can only phase on ARQ-E signals that are idling so this isn’t a
problem.
The
SIAM
mode will identify ARQ-E signals for the user. They are identified as TDM ARQ-E:4 or TDM ARQ-
E:8
, referring to 4- and 8- character repetition cycles used in this mode.
ERrchar
n Default: $5F (_)
Mode: AMTOR, PACTOR, Morse, NAVTEX and TDM Host: ER
“
n ” A hexadecimal value from $00-$7F used to denote the error character used by the DSP for Morse, ARQ,
FEC, PACTOR, NAVTEX, and TDM.
“
n ” is a hex value $00-7F, default $5F (underscore). This is the character that the DSP displays when it receives a
corrupted or bad character in Morse, ARQ, FEC, PACTOR, NAVTEX or TDM. You may want to set this character
to $2A (asterisk), $07 (bell), $20 (space) or $00 (null)—whichever works best for you.
ERRCHAR ON or ER Y
restores the default.
MWeight n Default: 10
Mode: All except packet Host: Mw
“
n ” 5 to 15, specifies roughly 10 times the ratio of one dot length to one inter-element space length in
transmitted Morse code.
A value of 10 results in a 1:1 dot-space ratio. A setting of 5 results in a 0.5:1 ratio, while a setting of 15 (maximum)
results in a 1.5:1 ratio.
MWEIGHT
applies only to the Morse transmit mode and the CW ID in all modes except
packet.
MWEIGHT
doesn’t affect the code output by the MID command.
NAVMsg ALL
,
N O NE
,
YES / N O letters
Default: All
Mode: NAVTEX Host: NM
letters ALL , N O NE , YES LIST , N O LIST (List = up to 13 letters which may or may not be separated
by spaces, commas or tabs.)
NAVMSG uses Letter arguments to determine which NAVTEX messages your DSP will print. NAVTEX messages
are grouped into classes by the second letter in the Preamble. The
NAVMSG
Command allows
ALL
,
NONE
or a
list of up to 13 letters representing message types to be Monitored or Rejected.
NAVMSG may be cleared with % , & , or OFF as arguments.
NAVStn ALL
,
N O NE
,
YES | N O letters
Default: All
Mode: NAVTEX Host: NS
letters ALL , N O NE , YES LIST , N O LIST (List = up to 13 letters which may or may not be separated
by spaces, commas or tabs.)
The
NAVSTN
command uses letter arguments to determine which
NAVTEX
transmitting stations the DSP will
print. NAVTEX transmitters are identified by the 26 letters of the alphabet. The NAVSTN Command allows ALL ,
NONE or a list of up to 13 letters representing NAVTEX transmitting stations to be monitored or rejected.
NAVSTN may be cleared by using % , & , or OFF as arguments.
NAvtex Immediate Command
Mode: All Host: NA
September, 05 11-5