Uniden BC898T manual Conventional Scanning, Ctcss Frequencies Hz

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other to the point where it is impossible to clearly receive any of the stations. A scanner equipped with CTCSS and DCS (like your scanner) can code each received frequency with a specific CTCSS or DCS frequency. Then, when you receive multiple signals, you only hear the transmission with the CTCSS or DCS tone you programmed. If you do not receive the correct tone with a signal, the scanner’s squelch remains closed and you hear nothing.

Local frequency allocation groups set cooperative standards to establish the CTCSS and DCS tone for each transmitter (or repeater).

You can search for the following CTCSS frequencies and DCS codes.

CTCSS Frequencies (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 (Octal)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conventional Scanning

Conventional scanning is a relatively simple concept. Each group of users in a conventional system is assigned a single frequency (for simplex systems) or two frequencies (for repeater systems). Any time one of them transmits, their transmission always goes out on the same frequency. Up until the late 1980’s this was the primary way that radio systems operated.

Even today, there are many 2-way radio users who operate using a conventional system:

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Contents Page Earphone Warning PrecautionsBC898T Controls and Display Contents Page Scanning Legally FCC Wants You to KnowIntroduction Frequency Range Steps Mode TransmissionFeature Highlights About This Manual Understanding Scanning What is Scanning?What is Searching? What is CTCSS/DCS?Ctcss Frequencies Hz Conventional ScanningRepeater Operation What is Trunk Tracking?Simplex Operation Trunked Scanning Edacs Trunking Types of Trunking SystemsMotorola Trunking LTR Trunking Information On The Internet Where To Obtain More InformationUsing a Computer to Control Your BC898T Included With Your Scanner Frequency Guide National Public SafetyFor Home Use Desktop Installation Installing Your ScannerListening Safely Using An Optional External Speaker/Earphone/HeadphoneUsing An Optional Tape Recorder Adapter Safety FeatureInstalling The Software Using the Demo SoftwareInstalling a Temporary Power Cord Installing The Scanner In a VehicleConnecting the Antenna Plug Connecting the DC Power CordInstalling a Permanent Power Cord Turning On the Scanner Setting the SquelchUsing the Rotary Tuner Basic OperationScanning Programmed Channels Using the Frequency/Channel Mode SelectorUsing the Lock Key/LED Manually Selecting a ChannelPriority Scanning Locking/Unlocking BanksLocking/Unlocking Channels Restoring All Locked Out ChannelsTrunk Scanning Options Using the DimmerID Lockout Setting the AttenuatorRestoring a Single ID ID Delay ModeID Hold Mode Searching TipsScan Lists ID Monitor ModeHolding On An Active Frequency SearchingChain Search Storing Found Frequencies Setting Data SkipSkipping Frequencies Automatically Storing Frequencies Setting Subaudible Tones for SearchingSearching a Trunked Bank Setting Delay For All Search RangesAttenuating All Search Ranges Searching for CTCSS/DCS Tones Searching for a Weather Broadcast Using Weather Alert SameTurning Weather Alert On/Off Dssccc Programming a Fips CodePage Transferring a Frequency to a Specific Channel ProgrammingTransferring a Programmed Frequency Programming a Channel With a CTCSS/DCS Tone Duplicate Frequency AlertDeleting a Stored Frequency Programming Tips Setting the Delay ModeSetting Delay in Scan or Search Mode Setting Delay in Manual ModeFrequency Skip Recording TransmissionsData Skip Changing the Frequency Step Setting the Modulation ModeProgramming Conventional Channels Setting Priority Channels Programming Channels and Entering Trunking Frequencies Setting the Scanner to Trunking Programming ModeProgramming Trunked Systems Programming Motorola SystemsProgramming Fleet Maps Selecting a Preset Fleet Map Programming Talk Group ID’s Programming a Hybrid SystemProgramming Edacs Systems Programming LTR Systems Care and Maintenance Troubleshooting Edacs Edacs Specifications Page Optional Accessories Appendix Preset Fleet MapsPreset Map Preset Map Size Code Restrictions User Defined Fleet MapsType I Programming Information Page Warrantor Uniden America Corporation Uniden One Year Limited WarrantyPage Page Page UBZZ01322ZB