AR-DV3 Tone Squelch, DCS, Voice Squelch & Descrambler

Summary: The AR-DV3’s extended squelch functions.

Selecting One

[F] then [1] shows TONE/CODE SQL. At SQL turn the dial to choose CTCSS, RTN, DCS or V.SCR, move down to the value, turn the dial and press [ENT]. Only one operates at a time, and they need FM with 6 or 15 kHz IF bandwidth.

• CTCSS (tone squelch): audio only when the tone matches. Includes a SRCH search for the tone.
• RTN (reverse tone): mutes while the tone is present.
• DCS: digital code squelch (individual calling), also with SRCH.
• V.SCR: restores inverted (scrambled) audio: 2000-7000 Hz in 10 Hz steps. (Not on the US consumer version.)

CTCSS Tones (Hz)

60.0, 67.0, 69.3, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5, 94.8, 97.4, 100.0, 103.5, 107.2, 110.9, 114.8, 118.8, 120.0, 123.0, 127.3, 131.8, 136.5, 141.3, 146.2, 151.4, 156.7, 159.8, 162.2, 165.5, 167.9, 171.3, 173.8, 177.3, 179.9, 183.5, 186.2, 189.9, 192.8, 196.6, 199.5, 203.5, 206.5, 210.7, 218.1, 225.7, 229.1, 233.6, 241.8, 250.3, 254.1.

DCS Codes

017, 023, 025, 026, 031, 032, 036, 043, 047, 050, 051, 053, 054, 065, 071, 072, 073, 074, 114, 115, 116, 122, 125, 131, 132, 134, 143, 145, 152, 155, 156, 162, 165, 172, 174, 205, 212, 223, 225, 226, 243, 244, 245, 246, 251, 252, 255, 261, 263, 265, 266, 271, 274, 306, 311, 315, 325, 331, 332, 343, 346, 351, 356, 364, 365, 371, 411, 412, 413, 423, 431, 432, 445, 446, 452, 454, 455, 462, 464, 465, 466, 503, 506, 516, 523, 526, 532, 546, 565, 606, 612, 624, 627, 631, 632, 654, 662, 664, 703, 712, 723, 731, 732, 734, 743, 754.

Voice Squelch

[F] then hold [1]: turn VOICE SQL ON and set the LEVEL 0-7. The squelch opens on voice and closes when it stops; the higher the value the louder the voice must be.