ARQE
Immediate Command
Mode: Command
Host: As
ARQE is an immediate command that switches the PK-232 into the ARQ-E receiving
mode.
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
PK-232 can only phase on ARQ-E signals that are idling so this is not a problem.
The SIGNAL Identification (SIAM) mode will identify ARQ-E signals for the user.
They are identified as "TDM ARQ-E:4" or 'TDM ARQ-E:S,' referring to 4- and
8character repetition cycles used in this mode.
ARQTmo "n"
Default: 60
Mode: AMTOR, Pactor
Host: AO
Parameters:
“n” - 0 to 250 specifies the number of seconds to send an ARQ SELCALL
before automatic transmitter shutdown.
ARQTMO sets the length of time during which your ARQ call will be sent, shutting
down automatically. As a general rule, if you can't activate another AMTOR or
Pactor station in the default time of 60 seconds, you can probably assume that
the other station can't hear your transmission.
ARQTOL “n"
Default: 3
Mode: AMTOR ARQ
Host: AO
Parameters:
“n”' 1 to 5, specifying a relative tolerance for bit boundary jitter.
ARQTOL controls the tolerance for received bit boundary jitter in AMTOR ARQ mode.
n is a number from 1 (tight tolerance) to 5 (loose tolerance). The number
signifies how far away from the expected bit transition time the actual received
transition may be, in tenths of a bit (milliseconds). If the transition occurs
further away than expected, the received block is counted as an error, even if
all three characters in the block appear to be valid AMTOR characters. The
default value of ARQTOL 3 is the equivalent of the fixed tolerance of previous
firmware releases.
ARQTOL should be set to a low number (tighter tolerance) for applications that
require nearly error-free communications. The tradeoff is that good received
character blocks are counted as bad if the bit transitions are suspect, thereby
causing retransmissions and lowering the effective character rate.
ARQTOL does not affect FEC, SELFEC or ARQ Listen modes.
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