BEARS-I Packet Radio Boot Up Procedure
PURPOSE: This document will lay out the procedures for establishing a Packet Radio Station from the communications vehicle designated BEARS-I (Bears One), an asset of BEARS, the Brevard Emergency Amateur Radio Services, Inc of Brevard County FL. Further information on BEARS can be found at
All BEARS laptop computers should have a "shortcut" on the "Desktop" with a link to a version of HyperTerm, the standard Windows based communications terminal emulation software. Any terminal emulation software can be used. The user is expected to be familiar with the use of such a program, and little will be discussed here about the software used to get user input from the keyboard to the Packet Radio TNC (Terminal Node Controller), and the data received or generated by the TNC to the output screen of the laptop. Please
Contact Me if you need further assistance.
Once the software is brought up, turn on the TNC. A "boot" message should appear displaying the TNC model and manufacturer, software rev, and should end with "cmd:" known as the "Command Prompt".
If the Boot msg does not display, click on the Configuration icon of the hyperterm software (the wrench icon), and adjust the Baud Rate (data speed) of the serial communications link. Probable speeds to try are:
Robert Osband-N4SCY, Computerist
Simply turn the TNC off and on to have it generate the Boot message. Once the baud rate has been established and the message appears, type "DISP I" at the Comand Prompt. It will display the current setting for the Information settings.
Settings to be typed in are:
- 1200 Baud - Over the air VHF data rate
- 4800 Baud - Standard GPS data rate
- 9600 Baud - a former "high speed" data rate
U BEARS-1 VIA WIDE1-1,WIDE3-3
BTEXT BEARS-I COMM VEHICLE - ON STATION IN (location name)
B E 90 (Beacon Every 900 seconds - 10 minutes)
Once the latitude & longitude of the operating station is known, the BTEXT field should be populated with an APRS (Automatic Packet Reporting System) compatible string, so that BEARS-I can be found on FindU.Com (http://map.FindU.Com/K4EOC-2)
BT !2819.66N/08044.25WUBEARS-I on station in Rockledge FL
dd = Degrees
mm.mm Minutes and hundredths of minutes (decimal minutes)
Notice that Latitude Degrees are two digits long (00-90, N or S), and that Longitude Degrees are three digits long (000 to 180, E or W). There is no seperator between Degrees and Minutes, and there are decimal minutes included. Reference is made to the APRS document PROTOCOL.TXT which is found in any DOS download of APRS Software.