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_______________________________________________________________________________<br />
ADDress "n" Default: $0000<br />
Mode: ALL<br />
Host: AE<br />
_________________________________ Parameters: _________________________________<br />
"n" - Zero to 65,535 ($0 to $FFFF) setting an Address in the <strong>PK</strong>-<strong>232</strong> memory.<br />
_______________________________________________________________________________<br />
The ADDRESS sets an address somewhere in the <strong>PK</strong>-<strong>232</strong>'s memory map. This command<br />
is usually used with the IO, MEMORY and the <strong>PK</strong> commands. It is used primarily<br />
by programmers and is of little use without the <strong>PK</strong>-<strong>232</strong> Technical <strong>Manual</strong>.<br />
_______________________________________________________________________________<br />
ADelay "n"<br />
Default: 4 (40 msec.)<br />
Mode: AMTOR<br />
Host: AD<br />
_________________________________ Parameters: _________________________________<br />
"n" - 1 to 9 specifies transmitter key-up delay in 10-millisecond intervals.<br />
_______________________________________________________________________________<br />
ADELAY is the length of time in tens of milliseconds between the time when the<br />
<strong>PK</strong>-<strong>232</strong> activates the transmitter's PTT line and the ARQ data begins to flow.<br />
The ADELAY command allows you to adjust a variable delay, from 10 to 90<br />
milliseconds to handle the PTT (Push-to-Talk) delay of different transmitters.<br />
In most cases, the default value of 4 (40 milliseconds) is adequate for the<br />
majority of the popular HF transmitters. If the AMTOR signal strength is good<br />
and you observe periodic errors caused by loss of phasing (shown by rephase<br />
cycles in the middle of an ARQ contact) during contacts, it may be necessary to<br />
adjust the ADELAY value.<br />
o<br />
o<br />
Be sure that errors and rephasing effects are not caused by the distant<br />
station before changing your ADELAY.<br />
If changing your ADELAY values does not improve link performance, reinstall<br />
your original value and ask the other station to try changing his ADELAY.<br />
Because the ARQ mode allows 170 milliseconds for the signal to travel to the<br />
distant station and return, increasing ADELAY will reduce the maximum working<br />
distance. The maximum theoretical range of an ARQ contact is limited to about<br />
25,500 kilometers. Using some of that time as transmit delay leaves less time<br />
for signal propagation. Thus the maximum distance available is reduced.<br />
Regardless of the setting of ADELAY, ARQ (Mode A) AMTOR may not work very well<br />
over very short distances, e.g., one or two miles. However, in very short<br />
distance work, ARQ should not be necessary to achieve error-free copy.<br />
_______________________________________________________________________________<br />
AFilter ON|OFF<br />
Default: OFF<br />
Mode: ALL<br />
Host: AZ<br />
_________________________________ Parameters: _________________________________<br />
ON - The ASCII characters specified in the MFILTER are filtered out and<br />
never sent to the terminal or computer.<br />
OFF - Characters in MFILTER list are only filtered from monitored packets.<br />
_______________________________________________________________________________<br />
4/91 A-12<br />
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