Specifications

17PK-900 Gateway Option Supplement

ARXTOR is defaulted OFF to accommodate old application programs that have no

provision for handling a spontaneous change of modes from PACTOR to AMTOR.

ARXTOR is most versatile when in the PACTOR or PTLIST operating mode.

Here is a summary of the AMTOR/PACTOR mode switching:

Target mode Original operating mode

detection AMTOR ALIST PACTOR PTLIST

AMTOR FEC if RFEC if ARXT if ARXT

AMTOR ARQ (MYSELCAL) always if ARXT

AMTOR ARQ (MYALTCAL) always

AMTOR ARQ (MYIDENT) always

monitor AMTOR ARQ always if ARXT

SELFECalways if ARXT if ARXT

monitor SELFEC if SRXALL if ARXT & SRX if ARXT & SRX

PTCONN always always

monitor PACTOR always

Note: When automatically switching from PACTOR to AMTOR and back again, the

modem isn’t changed.

ATxrtty “n” Default: 0

Mode: Morse, Baudot and ASCII Host: At

Parameters:

“n” 0 to 250, signifying the length of time (in units of 100 msec.) to delay

before sending text.

ATXRTTY allows Morse, Baudot or ASCII characters to be transmitted automati-

cally whenever they’re typed and the TNC is in the Converse mode. When all the

characters in the buffer have been sent, the unit reverts to receive.

The number

represents the length of time from the last character typed to

the dropping of PTT. This feature makes the repeated use of the commands RCVE

and XMIT unnecessary.

CODe “n” Default: 0 (International)

Mode: Baudot RTTY, Morse, AMTOR, PACTOR and packet Host: C1

Parameters:

“n” 0 to 8 specifies a code from the list below.

CODE Meaning Morse Baudot AMTOR Packet

7 TOR Lower Case — — RX/TX —

8 Extended Lower Case — — RX/TX —