Coded Squelch Modes PL, DPL, and Trunking | Radio Shack PRO-92

20-522.fm Page 29 Friday, September 17, 1999 12:46 PM

With few exceptions, such as the VHF Aircraft and Ma- rine bands, almost every other VHF or UHF radio system uses some form of coded squelch. By far, PL is the most popular mode among non-trunked systems. For most scanning use, try setting PL mode for all non-trunked channels. If you operate the bank in open mode, the scanner will display the appropriate code.

AM Mode

This sets the scanner to receive transmissions using am- plitude modulation (AM). AM is used for aircraft, military, some amateur radio, and some government transmis- sions. When the scanner receives a transmission on a channel set to the AM mode, it always stops on the trans- mission.

FM Mode

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

CODED SQUELCH MODES (PL, DPL, AND TRUNKING)

PL Mode

This sets the scanner to decode subaudible tones that are transmitted with many FM transmissions. Radio sys- tem users use these tones to allow multiple users to share a single frequency and to prevent interference from other systems operating nearby on the same frequency. When you select the PL mode for a channel, you can also set a specific PL tone for that channel.

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Radio Shack PRO-92 manual Coded Squelch Modes PL, DPL, and Trunking, AM Mode, FM Mode, PL Mode

Contents

PRO-92 500-Channel Portable Trunking Scanner Features Your scanner includes these special features Fm Page 4 Friday, September 17, 1999 1246 PM FCC Notice Pager transmissions Scrambled or encrypted transmissions Scanning Legally Contents Special Features Troubleshooting Preparation Power SourcesUsing Batteries Fm Page 11 Friday, September 17, 1999 1246 PM Fm Page 12 Friday, September 17, 1999 1246 PM Charging Rechargeable Batteries Using AC Power PWR DC 9V jack Using Vehicle Power Connecting the Antenna Connecting an Optional Antenna Connecting AN EARPHONE/ Headphones Listening Safely Connecting AN Extension SpeakerTraffic Safety Connecting the Clone Cable Using the Belt Clip Look AT the Keypad About Your Scanner Fm Page 21 Friday, September 17, 1999 1246 PM Fm Page 22 Friday, September 17, 1999 1246 PM Look AT the Display Motorola Channel Storage Banks Understanding BanksSearch Banks Low Freq Hi Freq Step Description MHz KHz GMRS/FRS Fm Page 27 Friday, September 17, 1999 1246 PM Understanding Your PRO-92’S Modes FM Mode AM ModePL Mode Coded Squelch Modes PL, DPL, and Trunking DPL Mode Ahhuuu LTR E. F. Johnson Mode Motorola Mode Edacs Mode Fm Page 34 Friday, September 17, 1999 1246 PM 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 Text Input Chart Press To Enter a Character from this Group Finding and Storing Active Frequencies Current Search Bank Searching a Preprogrammed Frequency RangeSearch Bank Search Range MHz Description Storing a Frequency While Searching for a Specified Channel Manually Changing a Search Range Turning Channel-Storage Banks Off and On Scanning the Channels Manually Tuning a Frequency Listening to a Weather Channel Deleting Frequencies from ChannelsListening to the Weather Band Weather Alert Feature Using the Delay Function Special FeaturesLocking OUT Channels or Frequencies Locking Out Channels Locking Out Frequencies Reviewing the Lock-Out Channels Clearing a Locked-Out Frequency Reviewing Locked-Out FrequenciesClearing All Lock Out Frequencies in a Search Bank Locked-out Priority Fm Page 52 Friday, September 17, 1999 1246 PM Display Description Changing the Receive Mode Range MHz Search Step kHz Using the AttenuatorChanging the Frequency Step Turning the KEY Tone on and OFF Using the Display BacklightUsing the Keylock Cloning the Programmed Data from Scanner to Scanner Changing the Display Contrast Understanding Trunking Trunking Operation Programming Fleet Maps Programming Trunking Frequencies Size Code Press 8 and the display below appears Storing Talk Group ID’s Talk Group ID’S Talk Group ID Hold Clearing Talk Group ID’s Locking Out Talk Groups IDReviewing Locked-Out Talk Group ID’s Clearing All Talk Group ID’s in One Bank Closed ModeOpen and Closed Modes Mode Open Closed Changing the Open/Closed Mode Guide to Frequencies General Guide to ScanningUS Weather Frequencies Ham Radio Frequencies This scanner’s birdie frequencies in MHz are Primary Usage Guide to the Action BandsTypical Band Usage Band Allocation Abbreviations Services VHF Low Band- 29-50 MHz -in 5 kHz steps Meter Amateur BandMeter Amateur Band -50-54 MHz Aircraft Band- 108-137 MHz VHF High Band 148-174 MHz Government Band 406-420 MHz Public Safety Band Locally AssignedCm Amateur Band 420-450 MHz Low Band 450-470 MHz General Trunked Band Frequency ConversionPrivate Trunked Band Problem Possible Cause Remedy Troubleshooting Fm Page 74 Friday, September 17, 1999 1246 PM Resetting the Scanner RESETTING/INITIALIZING the ScannerReset Initializing the Scanner Fm Page 76 Friday, September 17, 1999 1246 PM Care and Maintenance UHF T Specifications 9V DC RadioShack