FM Mode, LTR E. F. Johnson Mode | Radio Shack PRO-92 instruction

FM Mode

This sets the scanner to receive transmissions using fre- quency modulation (FM). FM is used for most public safety transmissions, as well as broadcast, business, and amateur radio transmissions. When the scanner re- ceives a transmission on a channel set to the FM mode, it always stops on the transmission.

LTR (E. F. Johnson) Mode

You can set your scanner so it decodes the talk group IDs used with LTR systems. This setting is called the LTR mode.

LTR systems are trunking systems used primarily by business or private communications service providers, such as taxicabs, delivery trucks, and repair services. These systems encode all trunking information as digital subaudible data that accompanies each transmission. Users on an LTR system are assigned to specific talk groups, which are identified by the radio as six-digit numbers. These numbers are in the form AHHUUU, where:

A = Area code (0 or 1)

H = Home repeater (01 through 20)

U = User ID (000 through 254)

When the scanner receives a transmission on a channel set to the LTR mode, it first decodes the LTR data in- cluded with the transmission. In the open mode, the scanner stops on the transmission and displays the talk group ID on the bottom line of the display. In the closed mode, the scanner only stops on the transmission if the LTR data matches a talk group ID that you have stored in the bank’s talk group ID list and have not locked out.

LTR systems are frequently programmed so that each radio has a unique ID code.

26	About Your Scanner

Image 26

Radio Shack PRO-92 owner manual FM Mode, LTR E. F. Johnson Mode

Contents

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