Reference & Connecting to a Computer

Summary: CTCSS tones and DCS codes at a glance, what “birdies” are, and faster ways to fill your channels than typing them in one by one.

CTCSS Tones

The UBC125XLT supports the full standard set of 50 CTCSS tones used across two-way radio (in Hz): 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, 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

It also supports the standard 104 DCS codes: 023, 025, 026, 031, 032, 036, 043, 047, 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.

Birdies

All scanners generate a small number of internally-produced “birdie” signals – false hits caused by the receiver’s own electronics rather than a real transmission – typically clustered around multiples of 16 MHz (its internal clock frequency). If the scanner stops scanning on a frequency and you hear nothing at all, it’s likely a birdie rather than a fault; lock that frequency out the same way you would any other unwanted channel or search frequency.

Faster Than Typing Frequencies In By Hand

Everything in this manual assumes you’re entering frequencies on the keypad, one at a time – fine for a handful of channels, tedious for filling several banks. There’s a much quicker way, built around UKAFG’s own frequency data rather than typing from a printed list.

Program It Directly with Squawker PC

Squawker PC’s Scanner Programmer writes straight to a connected UBC125XLT/C over USB – no manual entry, and no separate export/import step needed. Two ways to fill it:

• Quick Fill – enter your postcode and it auto-populates your banks with a sensible starting set: nearby aviation and ATC frequencies, national channels, and (optionally) marine VHF, all spread across banks automatically.
• Building banks manually – pick your own frequencies from Squawker’s search results – specific airports, common scanner frequencies, or anything else you’re interested in – and assign them to whichever bank you want, entirely under your own control.

See the UBC125XLT/C (Complete Guide) in Scanner Programming for the full walkthrough of both.