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APRS
®
APRS DATA COMMUNICATION (APRS BEACON)
X This function uses the APRS format for data communications including your station position, messages, etc..
X When data is received from another station, the direction of the received station (from your station’s perspective), their
distance, and their grid square locator is displayed. Any comments sent by the other station are also displayed.
X Meteorological data obtained from a connected Weather Station can be transmitted.
X APRS (Automatic Packet Reporting System) is a worldwide system introduced by Bob Bruninga, WB4APR .
< APRS
®
is a software program and registered trademark of Bob Bruninga, WB4APR.>
NAVITRA DATA COMMUNICATION (NAVITRA BEACON)
X The Navitra system was introduced by Kenwood in the 1990’s, for use within Japan.
CALL SIGN AND BEACON TYPE SETTINGS
X When an APRS/NAVITRA beacon is created, set the call sign and beacon type (APRS/NAVITRA) (Menu 301).
X SSID (Secondary Station IDentifiers) can be added to the end of your call sign (for example, W6DJY will become
W6DJY– 11). SSIDs can range from “None, – 1” to “– 15”, so that each call sign can have up to 16 settings.
Refer to the website for SSID: http://aprs.org/aprs11/SSIDs.txt (currently September 2010)
DIGIPEAT
X The term digipeat means that the beacon packet data is relayed. When a digipeater (relay station) receives a packet
(beacon), it saves it to memory. When the reception ends, the data is re-transmitted. Using digipeat, it is possible to
send beacons long distances.
X In order to perform a digipeat, you must set up a packet path (relay path) (Menu 3H0). For relay modes, you can
specify a direct call sign or you can use “WIDE1-1” or “WIDE1-1, WIDE2-1”, specifying a common alias and hops
number. Set the transceiver’s packet path according to the digipeater settings.
X Digipeat is very useful in reaching other stations when you have a weak signal. However, you need to set up the total
hops numbers and beacon transmissions moderately to prevent channel congestion.
WIDE type
WIDE type:
This degipeater can send the packet over a wide area.
Fill-in type:
Regional degipeaters are also called “RELAY type” relays.
These degipeaters are used for mobile stations when a
signal cannot reach a WIDE-type degipeater.
Fill-in type
(RELAY type)
Fill-in type
(RELAY type)
WIDE type
Note: While using APRS, in order to prevent Packet miss-decoding, access Menu No. 110 and set the Battery Saver to “Off” or “0.03”.