PK-232 – MBX OPERATING MANUAL COMMAND SUMMARY
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CONV is OFF (default), the high-order bit (bit seven) of characters received from the terminal is
set to 0 before the characters are transmitted.
AAb text Default: empty
Mode: Baudot, ASCII, AMTOR Host: AU
Parameters: text - Any combination of characters up to a maximum of 24 characters.
Use the AAB command to enter an acknowledgment text for Baudot, ASCII and AMTOR. AAB
sends automatic confirmation in Baudot, ASCII and AMTOR in response to a distant station's WRU?
request. Set WRU ON or CUSTOM bit-9 to activate your Auto-AnswerBack.
Type "AAB (24-character text)" to store your AnswerBack in memory.
ABaud "n" Default: 110 bauds
Mode: ASCII Host: AB
Parameters: "n" - Specifies the ASCII data rate or signaling speed in bauds from your PK-232
to your radio.
ABAUD sets the radio ("on-air") baud rate only in the ASCII operating mode. This value has no re-
lationship to your computer or terminal program's baud rate. The available "n" ASCII data rates in
bauds are: 45, 50, 57, 75, 100, 110, 150, 200, 300, 400, 600, 1200, 2400, 4800 and 9600.
AChg Immediate Command
Mode: AMTOR Host: AG
ACHG is an immediate command used in AMTOR by the receiving station to interrupt the sending
station's transmissions.
As the receiving station, you usually rely on the distant station, your partner in the ARQ "hand-
shake", to send the "+?" command to do the changeover. However, in ARQ (Mode A), you can use
the ACHG command to "break in" on the sending station's transmission. Use the ACHG command
only when it is needed.
ACKprior ON|OFF Default: OFF
Mode: Packet Host: AN
Parameters: ON - Priority Acknowledgment is enabled.
OFF - This feature is disabled.
This command implements the Priority Acknowledge scheme described by Eric Gustafson (N7CL),
which proposes to improve multiple access packet performance on HF and VHF simplex channels
with hidden terminals. When a busy channel clears, the acknowledgments are sent immediately,
while data and poll bits are held off long enough to prevent collisions with the ACKs. By giving pri-
ority to data ACKs, fewer ACKs will collide with other station's data, reducing retries. Digipeated
frames are sent immediately. RAWHDLC and KISS force ACKPRIOR off. These are the defaults for a
P-persistence system with NO Priority Acknowledgment:
ACKPRIOR OFF, PPERSIST ON, PERSIST 63, SLOTTIME 30,
RESPTIME 0, MAXFRAME 4, FRACK 5
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