Yaesu FT-7800R Operating Manual

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

28 FT-7800R OPERATING MANUALCTCSS TONE FREQUENCY (Hz)67.0 69.3 71.9 74.4 77.0 79.782.5 85.4 88.5 91.5 94.8 97.4100.0 103.5 107.2 110.9 114.8 118.8123.0 127.3 131.8 136.5 141.3 146.2151.4 156.7 159.8 162.2 165.5 167.9171.3 173.8 177.3 179.9 183.5 186.2189.9 192.8 196.6 199.5 203.5 206.5210.7 218.1 225.7 229.1 233.6 241.8250.3 254.1 – – – –CTCSS O PERATIONMany repeater systems require that a very-low-frequency audio tone be superimposed onyour FM carrier in order to activate the repeater. This helps prevent false activation of therepeater by radar or spurious signals from other transmitters. This tone system, called“CTCSS” (Continuous Tone Coded Squelch System), is included in your FT-7800R, and isvery easy to activate.CTCSS setup involves two actions: setting the Tone Mode and then setting of theTone Frequency. These actions are set up by using the [TONE(REV)] key and Setmode #44 (TN FRQ).1. Press the [TONE(REV)] key several times, so that“ENC” appears on the display; this activates the CTCSSEncoder, which allows repeater access.1) You may notice an additional “DCS” icon appearing while you press the[TONE(REV)] key in this step. We’ll discuss the Digital Code Squelch systemshortly.2) You may notice the “REV TN” indication on the display; this means that the Re-verse Tone Squelch system is active, which mutes your FT-7800R’s receiver when itreceives a call from the radio sending a matched CTCSS tone. The “DEC” icon willblink on the display when the Reverse Tone Squelch system is activated.2. Pressing the [TONE(REV)] key once more in above step will cause “ENC DEC” toappear. When “ENC DEC” appears, this means that the Tone Squelch system is active,which mutes your FT-7800R’s receiver until it receivesa call from another radio sending out a matching CTCSStone. This can help keep your radio quiet until a specificcall is received, which may be helpful while operating in congested areas.3. When you have made your selection of the CTCSS tonemode, press and hold in the [BAND(SET)] key for 1/2second to enter the Set mode, then rotate the DIAL knobto select Menu #44 (TN FRQ). This Menu selection allows setting of the CTCSS tonefrequency to be used.4. Press the [BAND(SET)] key momentarilyto enable adjustment of the CTCSS fre-quency.5. Rotate theDIAL knobu n t i l t h edisplay indicates the Tone Frequency youneed to be using.6. When you have made your selection, pressCTCSS/DCS O PERATION