PK-232 – MBX OPERATING MANUAL COMMAND SUMMARY
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WHYnot ON|OFF Default: OFF
Mode: Packet Host: WN
Parameters: ON - The PK-232 generates a reason why received packets were not displayed.
OFF - This function is disabled.
During packet operation, the PK-232 may receive many packets that are not displayed. Turning
WHYNOT on will cause the PK-232 to display a message explaining the reason the received packet
was not displayed to the screen. The messages and their meanings are shown below:
PASSALL: The received packet frame had errors, and PASSALL was off, preventing the
packet from being displayed to the screen.
DCD Threshold: The Threshold control was set too far counter clockwise. The DCO LED was
off when the packet was received.
MONITOR: The MONITOR value was set too low to receive this frame.
MCON: MCON was set too low to receive this type of frame.
MPROTO: MPROTO was set to off, and the received packet was probably a NET/ROM or
TCP/IP frame.
MFROM/MTO: The frame was blocked by the MFROM or MTO command.
MBX: The call sign of the sending station does not match the call sign setting in
the MBX command.
MBX Sequence: The frame was received out of sequence, probably a retry.
Frame too long: Incoming packet frame longer than 330 bytes. Probably a non-AX.25 frame.
Frame too short: Incoming packet frame shorter than 15 bytes. Only seen if PASSALL ON.
Probably noise.
RX overrun: Another HDLC byte was received before we could read the previous one out
of the HDLC chip.
Wideshft ON|OFF Default: OFF
Mode: Baudot/ASCII RTTY/AMTOR/Pactor Host: WI
Parameters: ON - RTTY tones are shifted 1000 Hz.
OFF - RTTY tones are shifted 200 Hz (emulates 170-Hz shift).
The WIDESHFT command permits the use of the PK-232 on VHF or HF with either wide (1000 Hz)
or narrow (200 Hz) shifts. Many amateur radio VHF and HF RTTY operators use 170 Hz shift. The
PK-232's 200 Hz shift is well within the filter tolerances of any RTTY demodulator in general serv-
ice. MARS stations will find WIDESHFT generally compatible with MARS and commercial 850 Hz
shift RTTY operations.
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