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Yaesu FT-7800 Manual

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50 FT-7800R OPERATING MANUAL
The ARTS feature uses DCS signaling to inform both parties when you and another ARTS-
equipped station are within communications range. This may be particularly useful during
Search-and Rescue situations, where is important to stay in contact with other members of
your group.
Both stations must set up their DCS codes to the same code number, then activate their
ARTS feature using the command appropriate for their radio. Alert ringers may be activated,
if desired.
Whenever you push the PTT switch, or every 25 seconds
after ARTS is activated, your radio will transmit a signal
which includes a (subaudible) DCS signal for about one
second. If the other radio is in range, the beeper will sound
(if enabled) and the display will show “IN.RNG” as opposed
to the out of range display “OUT.RNG” in which ARTS op-
eration begins.
Whether you talk or not, the polling every 25 seconds will continue until you de-activate
ARTS. Every 10 minutes, moreover, you can have your radio transmit your callsign via CW,
so as to comply with identification requirements. When ARTS is de-activated, DCS will also
be deactivated (if you were not using it previously in non-ARTS operation).
If you move out of range for more than one minute (two pollings), your radio 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, your radio 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 set-
tings; you must terminate ARTS in order to resume normal operation. This is a safety feature
designed to prevent accidental loss of contact due to channel change, etc. Here is how to
activate ARTS:
Basic ARTS Setup and Operation
1. Set your radio and the other radio(s) to the same DCS code number, per the discussion
on page 29.
2. Press and hold in the
[
S.SCH
(
ARTS
)]
key for 1/2 sec-
ond. You will observe the “OUT. RNG” display on the
LCD. ARTS operation has now commenced.
3. Every 25 seconds, your radio will transmit a “polling” call to the other station. When that
station responds with its own ARTS polling signal, the
display will change to “IN.RNG” to confirm that the other
station’s polling code was received in response to yours.
4. Press and hold in the
[
S.SCH
(
ARTS
)]
key for 1/2 second to exit ARTS operation and
resume normal operation of the transceiver.
ARTS
™
: AUTO RANGE TRANSPONDER SYSTEM
… 52 …


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