Timewave PK-232MBX, Руководство по эксплуатации

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PK-232 MBX – OPERATING MANUAL PACKET-RADIO
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4.4.7.3
Redisplay
If you have erased and retyped lots of characters, you may want to see "fresh" input,
especially if BKONDEL is OFF. This will also allow you to display any packets you might
have received while you were typing. Your PK-232 will show the line you're entering
when you type the REDISPLAY character (default <CTRL-R>).
4.4.7.4 The PASS Character
If you are terminal or terminal program, the following may be useful. Sometimes you
may want to include a special input character such as a Carriage Return (the SENDPAC
character) in a packet. For example, to send several lines in the same packet, you must
include <CR> at the end of each line. You can include any character in a packet (includ-
ing all special characters) by prefixing that character with the PASS character
<CTRL-V>:
I wasn't at the meeting.<CTRL-V><CR>
What happened?
Without the PASS character, this message would go out as two packets. By prefixing
the first <CR> with <CTRL-V>, you send it all at once, while maintaining the <CR> as
part of the text. The PASS character can be useful in formatting text Messages such as
CTEXT as well.
4.4.8 Packet Transmit Timing
Your PK-232 has a number of built-in timers used to control the Packet protocol and trans-
mit timing. The default values have been set at the factory to provide reasonable perform-
ance, but the values may not be optimum for your local area. Most protocol parameters
should be adjusted only after carefully reading about them later in the chapter.
You SHOULD adjust TXDELAY for your transmitter as indicated below.
4.4.8.1
TXDELAY and AUDELAY
Radios vary in the time it takes to switch from receive to transmit. If your PK-232 starts
sending data before your transmitter is up to power, the packet will not be received
properly at the distant end.
TXDELAY controls the delay between your transmitter's key-up and the moment when
your PK-232 starts sending data. The default value of 30 corresponds to a time of 300
mSec and works with most VHF/UHF FM transceivers. With modern transceivers TXDE-
LAY can often be reduced which will improve packet performance in your area. You
should perform the following procedure to optimize TXDELAY for your station.
o Find another station who can reliably digipeat your signals.
o Set your UNPROTO path to TEST via the callsign of the station who can digipeat
your signals.
o Set the MONITOR command to at least 1.
o Go to CONVERSE mode and send a few packets by pressing the <Enter> key. Note
that you should see them on your own screen when they are digipeated by the
other station.