ASCII Mode (1200 Baud)
Copying Weather Broadcasts NWS EMWIN
ASCII mode (1220 baud) mode can be used to copy emergency weather broad
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casts by the National Weather Service. The NWS Emergency Managers Weather
Information Network (EMWIN) is a wireless direct-to-computer information ser
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vice that the National Weather Service (NWS) provides with help from the Fed
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eral Emergency Management Agency. The NWS feeds a constant stream of
weather information (@ 1200,8,N,1), from around the world, to a satellite orbit
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ing the Earth. Many cities are coming on line now to capture this stream and
rebroadcast it on fixed VHF commercial FM frequencies just above the 2-meter
ham band.
Using your TNC in ASCII mode, with a PC and communications software, you
can copy these broadcasts. The content of the broadcasts may be plain ASCII text
(copyable with Pacterm - shipped with Kantronics TNCs) or graphics (copyable
with “WeatherNode” software, not carried by Kantronics). Interpretation of the
content of the products is up to the software. For updated information on
EMWIN and software to copy its modes, search the Internet.
To copy the broadcasts, simply cable together the equipment mentioned above,
tune your VHF FM receiver to the local EMWIN frequency, set the TNC to
ASCII mode, and follow the text on your PC screen.
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Note: Some computers may lose some of the data stream if a full RS-232 cable is
used. This can occur because the RS232 CD line, which is “tied” to the TNC’s
receive LED, may be cycling up and down. In this case, set CD to EXTERNAL.
Kantronics Host Mode Operation
Kantronics’ Host Mode allows your TNC to communicate with computer soft
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ware that is more sophisticated than standard terminal programs such as
Pacterm. Software, such as Kantronics’ HostMaster II+, that supports this mode
will automatically set your TNC INTFACE command to HOST mode and per
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form a soft reset.
Your host program will provide you with some means to give commands to the
TNC. For a complete description of your host program, refer to the manual that
comes with your software.
Other Modes of Operation Packet Modes of Operation
KAM’98 v 8.3 211 User’s Guide
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