Specifications

UBIT 7: OFF: In Morse receive, the character ..-- prints as a "^".
ON: In Morse, the character ..-- prints as a <Carriage Return>.
UBIT 8: Not used in the PK-900.
UBIT 9: ON: In AMTOR or PACTOR a received WRU character (FIGS-D) will cause
the Auto-Answerback text to be sent regardless of the setting
of WRU.
This is subject to the setting of the CODE command.
OFF: In AMTOR or PACTOR a received WRU character (FIGS-D) will have
no effect.
UBIT 10: OFF: Polling in the HOST mode is subject to HPOLL and must be done for
all changes in status.
ON: Status changes (e.g. Idle to Tfc) in AMTOR, FAX, TDM, PACTOR or
NAVTEX causes the PK-900 to issue the following host block:
SOH $50 n ETB
where n is $30-36, the same number that the OPMODE command
furnishes. This block is subject to HPOLL.
UBIT 11: ON: A "Connected" message appears when an ARQ link is first
established using seven-character SELCALLs (CCIR 625).
OFF: No Connected message appears at the start of ARQ communications.
UBIT 12: OFF: The Packet Morse ID (MID) is ON/OFF keying of the low tone.
ON: The Packet Morse ID is sent in 2-tone FSK with the low tone being
key-down and the high tone representing key-up. Use this setting
to keep other stations from sending a packet during the Morse ID.
UBIT 13: OFF: MailDrop Connect status messages are always sent to the local
user, regardless of the setting of MDMON.
ON: Remote user dialog and Connect status messages with the MailDrop
are shown only if MDMON is ON.
UBIT 14: OFF: In Packet, the transmit buffer for data sent from the computer to
the PK-900 is limited only by available PK-900 memory.
ON: In Packet, the serial flow control will permit only a maximum of
7 I-frames to be held by the PK-900 before transmission. This
solves a problem with the YAPP binary file transfer program which
relies on a small TNC transmit buffer to operate correctly.
UBIT 15: Not used in the PK-900.
UBIT 16: Not used in the PK-900.
UBIT 17: OFF: Morse, Baudot, ASCII and AMTOR transmissions start when
commanded by the user or an application program.
ON: Morse, Baudot, ASCII, PACTOR and AMTOR transmissions will not
begin until the channel is clear of signals. The channel is
considered clear when both the DCD and the Squelch input
(if used) are inactive. The PERSIST and SLOTTIME delay
functions are used if PPERSIST is ON, otherwise the DWAIT time
is used.
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