Specifications

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ARQTmo "n" Default: 60
Mode: AMTOR, PACTOR Host: AO
_________________________________ Parameters: __________________________________
"n" - 0 to 250 specifies the number of seconds to send an ARQ SELCALL or
PAConn before automatic transmitter shutdown.
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ARQTMO sets the length of time during which your ARQ SELCALL or PACTOR call
will be sent, shutting down automatically. As a general rule, if you can't
activate another AMTOR station in the default time of 60 seconds, you can
probably assume that the other station can't hear your transmission.
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ARQTOL "n" Default: 3
Mode: AMTOR ARQ Host: Ao
_________________________________ Parameters: __________________________________
"n" - 1 to 5, specifying a relative tolerance for bit boundary jitter.
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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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AScii Immediate Command
Mode: Command Host: AS
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ASCII is an immediate command that switches Radio Port 1 your PK-900 into the
ASCII mode.
ASCII is the proper mode to use if you wish to use RTTY to transmit text, data
or other information containing lower case and special characters not present in
the Baudot/Murray and ITA #2 alphabets or character sets. When 8BITCONV is set
ON, 8-bit ASCII data may also be sent and received.
Because the ASCII character set requires a minimum of seven bits to define each
character, under worst-case conditions, ASCII is more subject to data errors and
garbled text than Baudot/ITA#2 at the same data rate.
3/93 A-19