Yaesu FT-7800R Operating Manual

Also see for FT-7800R: Brochure & specs Technical supplement

50 FT-7800R OPERATING MANUALThe 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 duringSearch-and Rescue situations, where is important to stay in contact with other members ofyour group.Both stations must set up their DCS codes to the same code number, then activate theirARTS feature using the command appropriate for their radio. Alert ringers may be activated,if desired.Whenever you push the PTT switch, or every 25 secondsafter ARTS is activated, your radio will transmit a signalwhich includes a (subaudible) DCS signal for about onesecond. If the other radio is in range, the beeper will sound(if enabled) and the display will show “IN.RNG” as opposedto 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-activateARTS. 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 alsobe 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 thatno 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 tothe “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 featuredesigned to prevent accidental loss of contact due to channel change, etc. Here is how toactivate ARTS:Basic ARTS Setup and Operation1. Set your radio and the other radio(s) to the same DCS code number, per the discussionon 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 theLCD. ARTS operation has now commenced.3. Every 25 seconds, your radio will transmit a “polling” call to the other station. When thatstation responds with its own ARTS polling signal, thedisplay will change to “IN.RNG” to confirm that the otherstation’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 andresume normal operation of the transceiver.ARTS ™: AUTO R ANGE T RANSPONDER S YSTEM