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4.7.6 Going On The Air<br />
Make sure your transmitter and antenna are tuned and adjusted for the<br />
band and operating frequency you are using.<br />
On HF there are two ways you can go about talking to another station.<br />
o<br />
o<br />
First, you can look at the packets you have just MONITORED<br />
(or in your MHEARD list) and choose one of them to connect to.<br />
You can also "Call CQ" by entering the CONVERSE mode and pressing<br />
the key a few times.<br />
Either way you decide to go on the air, remember that things happen<br />
much more slowly on HF packet than they do on VHF and UHF packet.<br />
HF packet requires patience and careful tuning in order to be used<br />
successfully.<br />
If you are having problems connecting to other HF packet stations, try<br />
working with an experienced HF packet operator in your area and listen<br />
to each other's signals. See if you can copy each other's packet<br />
signals. If he cannot copy your signals, have him listen to your<br />
signal in the CALIBRATE mode to make sure you are transmitting a pure<br />
tone. As mentioned earlier, any distortion caused by overmodulation<br />
or RF feedback will make your signal difficult or impossible to copy.<br />
4.8 Advanced Packet Operation<br />
You <strong>PK</strong>-<strong>232</strong> has many commands and features that are not used for dayto-day<br />
connects conversations. Still, as you become more familiar<br />
with packet, some of these features may become important to you.<br />
4.8.1 Transparent Mode<br />
One of these features is the TRANSPARENT mode. The TRANSPARENT mode<br />
allows any 8-bit binary character to be sent by your packet station.<br />
You usually must use the TRANSPARENT mode to transfer binary and<br />
executable files to and from other stations.<br />
You can either enter the TRANSPARENT mode by typing TRANS at the<br />
command prompt after you connect, or by setting the CONMODE command to<br />
TRANS. Either way, once you enter the transparent mode, any character<br />
you type will be sent automatically after the PACTIME setting. This<br />
way any character can be sent by the <strong>PK</strong>-<strong>232</strong>. Although we recommend<br />
using HARDWARE flow control in transparent mode, SOFTWARE flow control<br />
is available with the TRFLOW and TXFLOW commands.<br />
To get back to Command mode after you are finished with transparent<br />
mode, you must type the COMMAND character (default ) 3 times<br />
within the "Guard time" set by the CMDTIME command (default 1-second).<br />
4.8.2 Sending 8-bit Data in Converse Mode<br />
Sometimes you may need to send a file that contains some 8-bit data,<br />
but not need all the features of the TRANSPARENT mode. In this case,<br />
you may find turning the command 8BITCONV ON is all that is needed.<br />
4/91 4-25<br />
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