Ats (Automatic Transponder System) - Yaesu FT-252 Operating Manual

The ATS feature uses DCS signaling to inform both parties when you and another ATS
equipped station are within communications range. This may be particularly useful dur-
ing Search-and Rescue situations, where is important to stay in contact with other mem-
bers of your group.
Activate their ATS feature using the command appropriate for their radio. Alert ringers
may be activated, if desired.
Whenever you push the PTT switch, or every 20 seconds after ATS is activated, your ra-
dio will transmit a signal which includes a (subaudible) DCS
signal for about 1 second. If the other radio is in range, the
beeper will sound (if enabled) and the display will show "
" as opposed to the out of range display "
RNG
which ATS operation begins.
Whether you talk or not, the polling every 30 seconds will
continue until you de-activate ATS. Every 10 minutes, more-
over, you can have your radio transmit your callsign via CW,
in order to comply with identification requirements.
If you move out of range for more than one minute (four pollings), your radio will sense
that no signal has been received, beeps will sound, and the display will revert to "
." If you move back into range, your radio will again beeps, and the display will
RNG
change back to the "
During ATS operation, your operating frequency will continue to be displayed, but no
changes may be made to it or other settings; you must terminate ATS in order to resume
normal operation. This is a safety feature designed to prevent accidental loss of contact
due to channel change, etc.
Basic ATS Setup and Operation
1. Press the [ F/MW ] key, then press the [ SET/ATS ] key. You
will observe the "
operating frequency. ATS operation has now commenced.
2. Press the [ SET/ATS ] key, your radio will transmit a "poll-
ing" call to the other station. When that station responds with its own ATS polling
signal, the display will change to "
ing code was received in response to yours.
3. Press the [ F/MW ] key, then press the [ SET/ATS ] key to exit ATS operation and re-
sume normal functioning of the transceiver.
ATS constitutes a form of "remote control" operation that may be restricted to certain
frequencies. U.S. users should confirm the current status of §97.201(b) of the FCC's
rules governing the 144 MHz band of the Amateur service before utilizing this fea-
ture.
FT-252 O
peraTing
AtS
( Automatic Transponder System )
" indication.
IN.RNG
" display on the LCD below the
SYNC
IN.RNG
M
anual
IN.
" in
OUT.RNG
" to confirm that the other station's poll-
OUT.
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