Calling another station on G-TOR
To call another station using G-TOR, enter the GTOR command and callsign of
the station you wish to link to at the Command prompt. For instance:
cmd:GTOR NØQZZ
Your KAM’98 will begin transmitting a link establishment frame and, if the other
station is on the air and in G-TOR Standby mode, that station will respond to
your link request and you will see the message “linked to NØGZZ” on your
screen. You can then start typing your message to the other station. Since you
started the link, your station will be the “Information Sending Station” (ISS). Af
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ter you have entered your message, use the <Ctrl+C> E directive to allow the
other station to send data to you. This causes the KAM’98 to send the G-TOR
changeover sequence and you become the “Information Receiving Station”
(IRS). While the other station is sending data to you, you may force a changeover
(seize the link) by typing the <Ctrl+C> T directive. You then become the ISS
again.
Once you have concluded your conversation, you may break the link by typing
the <Ctrl+C> D directive. This will send the proper QRT frame to the other sta-
tion and return your KAM’98 to G-TOR Standby mode. Alternatively you may
use the <Ctrl+C> X directive, which will also break the link and return you to
the command prompt.
Speed changes
The signal rate is automatically selected in G-TOR, based on the quality of the
link between the two stations. A link will begin at 100 baud. If the receiving sta
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tion then detects a number of correctly received frames (set by GTUP), it will re
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quest a speed change to 300 baud. When operating at 300 baud or 200 baud, the
receiving station will request a lower speed when it receives a number of incor
-
rect frames in a row (set by GTDOWN).
While you are linked to another station, the receiving station (IRS) controls the
speed of the link. If you are the IRS, you can force the other station to send at
100 baud by using the <Ctrl+C> 1 directive. The KAM’98 will then send the
speed change command to the other unit to change to 100 baud. Once the change
occurs, your KAM’98 will not direct the other station to speed up again until a
changeover has occurred or you set your KAM’98 back to auto-speed with the
G-TOR Mode Non-Packet Modes of Communication
KAM’98 v 8.3 129 User’s Guide
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