PK-232 – MBX OPERATING MANUAL
COMMAND SUMMARY
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A-13
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In most cases, the default value of 4 (40 milliseconds) is adequate for the majority of the popular
HF transmitters. If the AMTOR signal strength is good and you observe periodic errors caused by
loss of phasing (shown by rephase cycles in the middle of an ARQ contact) during contacts, it may
be necessary to adjust the ADELAY value.
o
Be sure that errors and rephasing effects are not caused by the distant station before
changing your ADELAY.
o
If changing your ADELAY values does not improve link performance, reinstall your original
value and ask the other station to try changing his ADELAY.
Because the ARQ mode allows 170 milliseconds for the signal to travel to the distant station and
return, increasing ADELAY will reduce the maximum working distance. The maximum theoretical
range of an ARQ contact is limited to about 25,500 kilometers. Using some of that time as transmit
delay leaves less time for signal propagation. Thus the maximum distance available is reduced.
Regardless of the setting of ADELAY, ARQ (Mode A) AMTOR may not work very well over very
short distances, e.g., one or two miles. However, in very short distance work, ARQ should not be
necessary to achieve error-free copy.
AF
ilter ON|OFF
Default: OFF
Mode: ALL
Host: AZ
Parameters:
ON -
The ASCII characters specified in the MFILTER are filtered out and never
sent to the terminal or computer.
OFF - Characters in MFILTER list are only filtered from monitored packets.
Some terminals and computers use special characters to clear the screen or perform other "spe-
cial" functions. Placing these characters in the MFILTER list, and turning AFILTER ON will keep the
PK-232 from sending them.
Exception: When ECHO is ON, and the terminal or computer sends a filtered character, the PK-232
will echo it back to the terminal or computer.
AFILTER works regardless of mode, or CONNECT/CONVERSE/TRANSPARENT status. One must be
careful to leave AFILTER OFF during Binary file transfers.
ALFD
isp ON|OFF
Default: ON
Mode: All
Host: AI
Parameters:
ON -
A line feed character <LF> IS sent to the terminal after each <CR>.
OFF - A <LF> is NOT sent to the terminal after each <CR>.
ALFDISP controls the display of carriage return characters received, as well as the echoing of those
that are typed in.
When ALFDISP is ON (default), your PK-232 adds a line feed <LF> to each carriage return <CR>
received, if needed. If a line feed was received either immediately before or after a carriage re-
turn, ALFDISP will not add another line feed. Use the PK-232's sign-on message to determine how
carriage returns are being displayed. ALFDISP affects your display; it does not affect transmitted
data.
Содержание PK-232MBX
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