Yaesu FT-1900E Operating Manual

26 FT-1900E OPERATING MANUALTONE S EARCH S CANNINGIn operating situations where you don’t know the CTCSS tone or DCS code being used byanother station or stations, you can command the radio to listen to the incoming signal andscan in search of the tone being used. Two things must be remembered in this regard: You must be sure that your repeater uses the same tone type (CTCSS vs. DCS). Some repeaters do not pass the CTCSS tone or DCS code; you may have to listen to thestation(s) transmitting on the repeater uplink (input) frequency in order to allow ToneSearch Scanning to work.To scan for the tone in use:1. Set the radio up for either CTCSS or DCS Decoder operation (see the previous discus-sion). In the case of CTCSS, “TSQ” will appear on the display; in the case of DCS,“DCS” will appear on the display.2. Press the Microphone’s [P3] key momentarily to start scan-ning for the incoming CTCSS or DCS tone/code.3. When the radio detects the correct tone or code, it will halton that tone/code, and audio will be allowed to pass.4. Press the Microphone’s [P3] key momentarily to lock in that tone/code and exit tonormal operation.If the Tone Scan feature does not detect a tone or code, it will continue to scanindefinitely. When this happens, it may be that the other station is not sending anytone. You can press the Microphone’s [P3] key to halt the scan at any time.You may listen to the (muted) signals from the other stations during Tone Scanning whenSet Mode Item “54 TS MUT” is set to “OFF.” See page 80 for details. You can also changethe Tone Search scanning speed, using Set Mode Item “55 TS SPD.” See page 82 fordetails.Tone Scanning works either in the VFO or Memory mode.CTCSS/DCS/EPCS O PERATION