PK-232 – MBX OPERATING MANUAL COMMAND SUMMARY
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Ax25l2v2 ON|OFF Default: ON
Mode: Packet Host: AV
Parameters: ON - The PK-232 uses AX.25 Level 2 Version 2.0 protocol.
OFF - The PK-232 uses AX.25 Level 2 Version 1.0 protocol.
This command allows the selection of either the old (version 1) version of the AX.25 packet proto-
col or the current (version 2.0) protocol. Some implementations of version 1 of AX.25 protocol
won't properly digipeat Version 2.0 AX.25 packets. Most users run AX.25 version 2 but this com-
mand allows returning to the older version if necessary for compatibility.
AXDelay "n" Default: 0 (00 msec.)
Mode: Packet Host: AX
Parameters: "n" - 0 to 180 specifies a key-up delay for voice repeater operation in ten-milli-
second intervals.
AXDELAY specifies the period of time the PK-232 will wait – in addition to the delay set by TXDE-
LAY – after keying the transmitter and before data is sent. Packet groups using a standard "voice"
repeater to extend the range of the local area network may need to use this feature.
Repeaters with slow electromechanical relays, auxiliary links (or other circuits which delay trans-
mission after the RF carrier is present) require more time to get RF on the air. Try various values to
find the best value for "n" if you're using a repeater that hasn't been used for packet operations
before. If other packet stations have been using the repeater, check with them for the proper set-
ting. AXDELAY acts together with AXHANG.
AXHang "n" Default: 0 (000 msec.)
Mode: Packet Host: AH
Parameters: "n" - 0 to 20 specifies voice repeater "hang time" in 100-millisecond intervals.
AXHANG allows you to increase efficiency when sending packets through an audio repeater that
has a hang time greater than 100 milliseconds.
When the PK-232 has heard a packet sent within the AXHANG period, it does not add the repeater
keyup delay (AXDELAY) to the key-up time. Try various values to find the best value for "n" if you
are using a repeater that hasn't been used for packet operations before. If other packet stations
have been using the repeater, check with them for the proper setting.
BAudot Immediate Command
Mode: Command Host: BA
BAUDOT is an immediate command that switches the PK-232 into the Baudot mode. Baudot RTTY
operation is very common around the world, and is the basis of the telex network and most radio
press, weather and point-to-point message services. The Baudot/Murray and ITA #2 character sets
do not contain lower case or the special punctuation and control characters found in ASCII. Be-
cause the Baudot/ITA #2 code requires only five information bits to define each character, it will
generally suffer fewer errors than ASCII code at the same data rate.
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