FT-25R/FT-25E Advance Manual
25
ARTS (Automatic Range Transponder System)
The ARTS feature uses DCS signaling to inform both parties when another ARTS-
equipped station is within communications range. This may be particularly useful during
Search and Rescue situations, where it is important to stay in contact with the other
members of the group.
The stations must set up their DCS codes to the same code number, and then activate
their ARTS feature using the command appropriate for their transceiver. Alert ringers may
be activated, if desired.
Whenever the
PTT
switch is pressed, or every 15 or 25 seconds after ARTS is activated,
the transceiver will transmit a signal which includes a (subaudible) DCS code for about
one second. If another ARTS enabled transceiver is in range, the beeper will sound and
the display will show “IN.RNG”. When the other transceiver is out of range, “
OUT.RNG
” is
shown when the ARTS function is in operation.
Whether or not the
PTT
switch is pressed, the polling
will continue every 15 or 25 seconds until the ARTS
transponder is deactivated. Moreover, the transceiver
may be programmed to transmit a callsign, via
CW, every 10 minutes, to comply with identification
requirements. When ARTS is deactivated, DCS will
also be deactivated (if it was not being used previously
in non-ARTS operation).
If you move out of range for more than one minute (four pollings), the transceiver will
sense that no signal has been received, three beeps will sound, and the display will
revert to “
OUT.RNG
” If you move back into range, the transceiver will again beep, and the
display will change back to the “
IN.RNG
” indication.
During ARTS operation, it is not possible to change the operating frequency or other
settings. In order to resume normal operation, ARTS must be terminated. This is a safety
feature designed to prevent accidental loss of contact due to channel change, etc.
Basic ARTS Setup and Operation
1. Set all the transceivers to the same DCS code number, per the instructions on page
11.
2. Press and hold the [
2
] key.
• “OUT.RNG” will be displayed on the LCD.
• ARTS polling will begin.
3. Every 25 seconds, the transceiver will transmit a “polling” call to the other station.
