Radio Shack PRO-97 manual Trunking, How trunking works

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Beyond the Basics

trunking

how trunking works

The scanner tracks transmissions that use the Motorola Type I and Type II (such as Smartnet and Privacy Plus) and hybrid analog trunking systems, plus GE/ Ericsson (EDACS) and EF Johnson (LTR) type systems extensively used in many communication systems.

Trunking systems allocate a few frequencies to many different users. When the mobile unit transmits a signal, one frequency is chosen from among the allocated frequencies in that trunking system. The user’s ID talk group is sent with the signal.

To receive trunking signals, you must store all the trunking control frequencies for Motorola systems or all the trunking group frequencies for EDACS and LTR in one bank (see “Storing Known Frequencies into Channels”) and input ID codes in the ID memory (see “Storing Talk Group IDs”).

Your PRO-97 automatically calculates Motorola voice channel frequencies when it decodes the control channel. This eliminates the need to enter all the Motorola group frequencies.

The control channels are subject to change depending on the day. Therefore enter all the control frequencies in the same bank. If you do not know which is the control channel, it is better to enter all the system frequencies into the same bank.

When the scanner decodes the Motorola control channel and ﬁnds the voice channel, the scanner displays the control channel memory location on the top line, the received frequency with VC (voice channel) on the second line, the bank and control channel memory location number on the third line and the Motorola ID number on the bottom line.

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Contents PRO-97 1,000 Channel Triple Trunking Hand Held Scanner Contents Contents ﬁnding and storing active frequencies Trunking Care Glossary FAQs Frequently Asked Questions WarrantySpeciﬁcations 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 Using batteries Power sourcesNever install non-rechargeable batteries Charging rechargeable batteries Using AC power Connecting an earphone/headphones Basics Using vehicle battery powerListening safely Connecting an extension speakerTrafﬁc safety Connecting an optional external antenna Basics Connecting the supplied antennaTransferring data to or from another scanner or Basics Using the belt clipUnderstanding 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 Turning on the scanner and setting squelch Setting up your scannerBasics Storing known frequencies into channels Beyond the Basics Ctcss and DCS Beyond the Basics DCS Code Table Storing trunking frequencies into channelsAssigning a text tag to a channel Storing text tagsAssigning a text tag to a bank Assigning a text tag to a group IDText input chart Searching a preprogrammed frequency range ﬁnding and storing active frequenciesSearch bank SR0 marine band Band chartsBeyond the Basics Search bank SR2 FRS/GMRS/MURS band Search bank SR1 CB 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 Listening to the weather band Beyond the Basics Manually tuning a frequencyListening to a weather channel Same standby modeWX 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 Copying a frequency into the priority channel Signal StalkerUsing Signal Stalker II with lockout Using Signal StalkerTurning channel-storage banks off and on Scanning the channelsMonitoring a single channel/power save circuit Using Ctcss and DCSDeleting all frequencies in a channel bank Deleting frequencies from channelsLocking 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 Turning the key tone on and off Using the display/key backlightWhile Multi-System Trunking Scanner appears, press Changing the display contrast Beyond the Basics Using the keylockReceives data from another scanner other than a PRO-97 Beyond the Basics Cloning the programmed dataHow trunking works TrunkingTo listen to the transmission, the mode Programming trunking frequencies Beyond the Basics Setting squelch for trunking modeBeyond the Basics Programming Motorola trunking systems UHF-Lo Beyond the Basics Programming ﬂeet maps Programming Motorola trunking systems 800 MHzBlock Size Code S10 S11 S12 Storing talk group IDs Talk group IDsBeyond the Basics Beyond the Basics Turning an ID sub-bank on or off Talk group ID holdLocking out talk group IDs Delay function in ID indication modeClearing 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 Scanning legally FCC wants you to knowGlossary Scanner is not working at all. What’s wrong? FAQs Frequently Asked QuestionsRadioShack Corporation