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APRS-14
■ TX Interval Time <TX INTERVAL>
You can change the interval for automatically transmitting
APRS packets. Access <TX INTERVAL > and select 0.2, 0.5,
1, 2, 3, 5, 10, 20, 30 or 60 minutes. The default is 3 minutes.
Note:
◆ With “AUTO” in < METHOD > and Beacon ON, pressing the Tuning
control to complete the setting causes the APRS packet to be immediately
transmitted. After that, APRS packets are transmitted at intervals of the
selected period.
◆ While signals are present, an APRS packet is not transmitted after the
interval. after signals drop, transmitting is executed.
■ Decay Algorithm <DECAY ALGORITHM>
This function continuously extends the packet transmission
interval in the case that there is no change of position
information.
• When the position data does not change, the data is transmitted
based on a Decay Algorithm (1 minute, 2 minutes, 4 minutes, 8
minutes, 16 minutes, 32 minutes, 32 minutes, 32 minutes, etc.)
• When My station position data changes, the data is transmitted
using an interval time based on the set Initial Interval.
• When the set time elapses and transmission is performed but a
busy signal is present, the transceiver does not transmit. When
there is no longer a busy signal, the transceiver attempts to
transmit.
Note:
◆ While transmitting by pressing the [PTT] switch, beacon transmission is
reserved.
◆ If My callsign is not set, the APRS packet will not be transmitted.
◆ Independent of this interval, the transmission of the message is in 1 minute
intervals.
■ Proportional Pathing <PROPORTIONAL PATHING>
This function automatically changes the transmit packet path with
the elapsed time.
Operation example for when PROPORTIONAL PATHING = ON
Transmission interval is 2 minutes. (When the <DECAY
ALGORITHM> = ON, the decay transmission interval takes
precedence.)
The packet path changes with each transmission as shown
below (when the packet path is set as WIDE1-1, WIDE2-1).
2 minutes : DIRECT
4 minutes : WIDE1-1 (1 Hop)
6 minutes : DIRECT
8 minutes : WIDE1-1, WIDE2-1 (2 Hops)
10 minutes : DIRECT
12 minutes : WIDE1-1 (1 Hop)
14 minutes : DIRECT
16 minutes : WIDE1-1, WIDE2-1 (2 Hops)
This is repeated.
When jointly using a Decay Algorithm, if the speed is 1 knots or
slower, a Decay Algorithm pattern is used for transmitting, but if the
speed is 3 knots or faster, it changes to Proportional Pathing.
PROGRAMMING A PACKET PATH
Enter Menu mode and access Menu 612.
Select the packet path type from [New-N PARADIGM], [RELAY
PARADIGM], [STATE/SECTION/REGION], or [OTHERS].
When you press [USE], the “
” indicator appears on the left side
of the packet path type, showing the current used information.
[New-N PARADIGM]:
This digipeat type has been used mainly in North America, but is
now used worldwide.
1 Set the TYPE to [New-N PARADIGM], then press [USE].
2 Set WIDE 1-1 to [OFF] or [ON].
• Set WIDE 1-1 to [ON] to use the digipeater of the RELAY type
(Fill-in type) with the New-N PARADIGM.
• When set to [ON], 1 packet path in addition to WIDE 1-1 can be
used, as per the TOTAL HOPS setting.
3 Select the relay step number for the TOTAL HOPS setting.
• You can confi rm the setting contents in PATH IS VIA.
[RELAY PARADIGM]:
This is one of the digipeat types used in Europe.
1 Set the TYPE to [RELAY PARADIGM], then press [USE].
2 Set RELAY to [OFF] or [ON].
• Set RELAY to [ON] to use the digipeater of the RELAY type (Fill-
in type) with the RELAY PARADIGM.
• When set to [ON], 1 packet path in addition to RELAY can be
used, as per the TOTAL HOPS setting.
3 Select the relay step number for the TOTAL HOPS setting.
• You can confi rm the setting contents in PATH IS VIA.