Understanding CTCSS/DCS, Search Banks | Radio Shack PRO-92 specs

The 1st digit identifies the bank (0–9). The 2nd and 3rd digits identify the channel within the bank (00–49).

Search Banks

This scanner is able to search 10 search banks. You can also replace a bank with one of the pre-programmed ser- vice bands. (For the default setting, see “Searching a Preprogrammed Frequency Range” on Page 34.)

Note: You can increase the number of preprogrammed frequency ranges your scanner can receive (up to 100) using an optional PC interface kit (available at your local RadioShack store).

UNDERSTANDING CTCSS/DCS

Continuous Tone Coded Squelch System (CTCSS) and Digital Coded Squelch (DCS) are two methods used to prevent interference by other radio communications. Your scanner can receive transmissions that use these codes.

When your scanner receives a CTCSS transmission, PL (private line) appears. When your scanner receives a DCS transmission, DPL (digital private line) and a 3-dig- it code appear.

PL Codes

PL codes are low-frequency audio tones that are used to differentiate different users on the same channel. PL codes appear according to the EIA standard CTCSS tones, and range from 67.0 Hz to 254.1 Hz. PL codes are displayed directly as a frequency.

DPL Codes

DPL codes are similar to PL codes, except they might be transmitted as either tones or digital codes. Although there are as many as 4096 DPL codes, only about 100 are actually used.

DPL codes appear in the format Dxxx, where xxx is an octal code.

About Your Scanner

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Radio Shack PRO-92 owner manual Understanding CTCSS/DCS, Search Banks, DPL Codes

Contents

PRO-92 Handheld Scanner Contents Operation Special Features General Guide to Scanning TroubleshootingCare Specifications Trunking Operation Features Scanner scans Features Scanning Legally FCC Notice Preparation Power Sources Using Batteries Preparation11 Replace the cover Charging Rechargeable Batteries Using AC Power PWR DC 9V jack Using Vehicle Power Connecting an Optional Antenna Connecting the Antenna Listening Safely Connecting AN EARPHONE/ Headphones Traffic Safety Connecting AN Extension SpeakerUsing the Belt Clip About Your Scanner Connecting the Clone Cable Look AT the Keypad About Your Scanner Look AT the Display Channel Storage Banks 7 are turned off Search ModeUnderstanding Banks DPL Codes Understanding CTCSS/DCSSearch Banks PL Codes Open and Closed Modes Understanding Your SCANNER’S Modes AM Mode LTR E. F. Johnson Mode FM Mode Motorola Mode Edacs Mode Operation Turning on the Scanner and Setting Squelch Bank Channel Manual Storing Known Frequencies Into Channels Assigning a Text Tag to a Channel Storing Text Tags Assigning a Text Tag to a Bank Press To Enter a Character from this Group Text Input Chart Func 9 w x y z Finding and Storing Active FrequenciesSearching a Preprogrammed Frequency Range Press Current Search Bank Func then Tune Storing a Frequency While Searching for a Specified ChannelChanging a Search Range with a Preprogrammed Range Manually Changing a Search Range Scanning the Channels Turning Channel-Storage Banks Off and On Manually Tuning a Frequency Displaying Weather Messages Deleting Frequencies from ChannelsListening to the Weather Band Listening to a Weather Channel Using the Delay Function Special Features Locking Out Frequencies Locking OUT Channels or FrequenciesLocking Out Channels Reviewing the Lock-Out Channels Locked-out Reviewing Locked-Out FrequenciesClearing a Locked-Out Frequency Clearing All Lock Out Frequencies in a Search Bank Priority Special Features Display Description Changing the Receive ModeChanging the Frequency Step Range MHz Search Step kHz Using the Attenuator Changing the Display Contrast Using the Display BacklightUsing the Keylock Turning the KEY Tone on and OFF Cloning the Programmed Data from Scanner to Scanner Trunking Operation Understanding Trunking Programming Trunking Frequencies Setting Squelch for the Trunking Mode Programming Motorola Trunking Systems UHF-Lo Offset Frequency Size Code Programming Fleet Maps Talk Group IDS Talk Group ID Hold Storing Talk Group IDs Clearing All Talk Group IDs in One Bank Locking Out Talk Group IDsReviewing Locked-Out Talk Group IDs Clearing Talk Group IDs Open and Closed Modes Closed Mode General Guide to Scanning Changing the Open/Closed ModeMode Open Closed Birdie Frequencies Guide to FrequenciesUS Weather Frequencies Ham Radio Frequencies General Guide to Scanning VHF Band Guide to the Action BandsTypical Band Usage Primary Usage Band Allocation Abbreviations Services Aircraft Band- 108-137 MHz Meter Amateur BandVHF Low Band- 29-50 MHz in 5 kHz steps Meter Amateur Band- 50-54 MHz Low Band 450-470 MHz Government Band 406-420 MHzCm Amateur Band 420-450 MHz Frequency Conversion Squelch is not TroubleshootingProblem Possible Cause Remedy DC 9V jack RESETTING/INITIALIZING the ScannerResetting the Scanner Initializing the Scanner ResetCare UHF T Specifications 9V DC Specifications71 Limited One-Year Warranty