Radio Shack PRO-97 manual Open and closed modes

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The Basics

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 included 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.

open and closed modes

You can set your scanner to change the way it receives signals. These settings, called open mode and closed mode, affect how the scanner receives signals from communications systems that use some type of closed squelch (such as Motorola, EDACS, and LTR systems).

Notes

In open mode, you hear all active talk groups except those

you specifically exclude, making it easy to hear everything

 

 

going on. In closed mode, you hear only those talk groups

 

you specify. This makes it easy to listen only to talk groups

 

you are interested in and exclude others.

 

When you select a system voice channel manually, any

 

transmission opens squelch, regardless of the current

 

mode.

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Contents PRO-97 1,000 Channel Triple Trunking Hand Held Scanner Contents Contents finding and storing active frequencies Trunking Specifications Glossary FAQs Frequently Asked Questions WarrantyCare FCC wants you to knowYour scanner’s controls ENT completes the entry of frequencies and text TUV enters an 8, or inputs characters T, U, or Basics OFF VOL/SQ turn the scanner on or off and adjust the squelch Power sources Using batteriesNever install non-rechargeable batteries Charging rechargeable batteries Using AC power Basics Using vehicle battery power Connecting an earphone/headphonesListening safely Connecting an extension speakerTraffic safety Basics Connecting the supplied antenna Connecting an optional external antennaBasics Using the belt clip Transferring data to or from another scanner orUnderstanding your scanner’s modes AM modeQuick start DCS DC mode FM modeCtcss CT mode Motorola mode Basics Edacs mode LTR mode Open and closed modes Basics Setting up your scanner Turning on the scanner and setting squelchBasics Storing known frequencies into channels Beyond the Basics Ctcss and DCS Beyond the Basics Storing trunking frequencies into channels DCS Code TableStoring text tags Assigning a text tag to a channelAssigning a text tag to a group ID Assigning a text tag to a bankText input chart finding and storing active frequencies Searching a preprogrammed frequency rangeBand charts Search bank SR0 marine bandBeyond the Basics Search bank SR1 CB band Search bank SR2 FRS/GMRS/MURS bandSearch bank SR3 police/fire band Search bank SR4 aircraft Search bank SR6 programmable limit search Searching active frequencies in a rangeSearch bank SR5 amateur band Beyond the Basics Beyond the Basics Manually tuning a frequency Listening to the weather bandSame standby mode Listening to a weather channelWX Alert and beep tone confirmation Copying a frequency into a specified channel Using frequency copyBeyond the Basics Skywarn Copying a frequency into an empty channel within a bank Signal Stalker Copying a frequency into the priority channelUsing Signal Stalker Using Signal Stalker II with lockoutScanning the channels Turning channel-storage banks off and onUsing Ctcss and DCS Monitoring a single channel/power save circuitDeleting frequencies from channels Deleting all frequencies in a channel bankLocking out channels Using delayLocking out channels or frequencies Reviewing locked-out frequencies Reviewing locked-out channelsLocking out frequencies Clearing all locked-out frequencies in a search bank PriorityClearing a locked-out frequency Beyond the Basics Changing the receive mode Using the attenuator Using the display/key backlight Turning the key tone on and offWhile Multi-System Trunking Scanner appears, press Beyond the Basics Using the keylock Changing the display contrastBeyond the Basics Cloning the programmed data Receives data from another scanner other than a PRO-97Trunking How trunking worksTo listen to the transmission, the mode Beyond the Basics Setting squelch for trunking mode Programming trunking frequenciesBeyond the Basics Programming Motorola trunking systems UHF-Lo Beyond the Basics Programming Motorola trunking systems 800 MHz Programming fleet mapsBlock Size Code S10 S11 S12 Talk group IDs Storing talk group IDsBeyond the Basics Beyond the Basics Talk group ID hold Turning an ID sub-bank on or offDelay function in ID indication mode Locking out talk group IDsClearing all talk group IDs in a single bank Reviewing locked-out talk group IDsClearing talk group IDs Changing the open/closed mode Birdie frequencies Service and repairCare Specifications Selectivity 25 27.995 MHz at AM mode ±5 kHz 9V DC Beyond the Basics Initializing your scanner FCC wants you to know Scanning legallyGlossary FAQs Frequently Asked Questions Scanner is not working at all. What’s wrong?RadioShack Corporation
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