Tone Search Scanning - Yaesu FT-7900R Operating Manual

CTCSS/DCS O
In operating situations where you don't know the CTCSS or DCS tone being used by an-
other station or stations, you can command the radio to listen to the incoming signal and
scan 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; you may have to listen to the station(s)
transmitting on the repeater uplink (input) frequency in order to allow Tone Search Scan-
ning 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, "ENC DEC" will appear on the display; in the case of
DCS, "DCS" will appear on the display.
2. Press and hold in the [ BAND ( SET )] key for 1/2 second to enter the Set mode.
3. Rotate the DIAL knob to select Menu #44 (TN FRQ
when CTCSS is selected, or Menu #9 (DCS.COD
ing DCS operation.
4. Press the [ BAND ( SET )] key to enable adjustment of
the selected Menu Item.
5. Press the [ SCAN ( SEL )] key momentarily to start scan-
ning for the incoming CTCSS or DCS tone/code.
6. When the radio detects the correct tone or code, it will
halt on that tone/code, and audio will be allowed to pass.
Press the [ BAND ( SET )] key momentarily to lock in that
tone/code, then press and hold in the [ BAND ( SET )]
key for 1/2 second to save the new setting and exit to
normal operation.
If the Tone Scan feature does not detect a tone or code, it will continue to scan
indefinitely. When this happens, it may be that the other station is not sending any
tone. You can press the [SCAN(SEL)] key to halt the scan at any time.
Tone Scanning works either in the VFO or Memory modes.
30
PERATION
T S
ONE EARCH
DCS.COD) dur-
DCS.COD DCS.COD DCS.COD
S
CANNING
TN FRQ TN FRQ) TN FRQ
TN FRQ
FT-7900R O M
PERATING ANUAL