APRS-14
SETTING BEACON TX ALGORITHM
Enter Menu mode and access Menu 611.
■
Packet Transmit Method <METHOD>
Select the operation method for transmitting APRS
packets. The table concludes how operations differ
depending on the selection.
[MANUAL]:
Each press of
[BCON]
transmits your APRS packet.
[PTT]:
1
Press
[BCON]
to switch the function ON.
• “BCON” appears and blinks.
2
Press and hold the microphone
[PTT]
, then speak
into the microphone.
3
Release the microphone
[PTT]
.
• Releasing the switch transmits your APRS packet.
• You cannot retransmit an APRS packet unless the
time selected in <TX INTERVAL > passes. Wait until
“BCON” starts blinking to indicate transmitting is
ready.
4
To switch the function OFF, press
[BCON]
again.
[AUTO]:
1
Press
[BCON]
to switch the function ON.
• “BCON” appears.
• Switching the function ON transmits your APRS
packet once. After that, APRS packets are
automatically transmitted at intervals of the period
selected in <TX INTERVAL >.
2
To switch the function OFF, press
[BCON]
again.
[SmartBeaconing]:
1
Press
[BCON]
to switch the function ON.
• “BCON” appears and blinks.
• After manually transmitting your station position
data 1 time, your position data will be automatically
transmitted using the time interval set under
“SmartBeaconing” <Menu No. 630 and 631>.
2
To switch the function OFF, press
[BCON]
again.
Note:
After setting “SmartBeaconing”, the TX Interval Time,
Decay Algorithm and Proportional Pathing features will no longer
operate.
■
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.
