Manuals / Radio Shack / Computer Equipment / Scanner

Radio Shack 20-164 Squelch and Attenuator, To turn on the backlight, To change the backlight mode

Models: 20-164

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To turn on the backlight:

1.Hold down LIGHT until the light turns on.

2.To turn off the backlight, press LIGHT.

To change the backlight mode:

1.	Turn on the scanner. “Multi-system Trunking
	Scanner” appears.
2.	While “Multi-system Trunking Scanner”
	appears, press LIGHT.
3.	Press  or  to select a backlight mode
	and duration (seconds).

		Normal	Keypress	Ignore

		3	K3	I3

		5	K5	I5

		10	K10	I10

		20	K20	I20

4.	Press ENT.

To change the display contrast:

1.Press MAN.

2.Press FUNC then 9.

3.Press  or  to select the contrast.

4.Press ENT.

Squelch and Attenuator

The squelch and attenuator help you control your scanner’s sensitivity. If you hear a hissing sound, the scanner will remain on an active channel, even after a disconnect tone or a stopped transmission.

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Radio Shack 20-164 manual Squelch and Attenuator, To turn on the backlight, To change the backlight mode

Contents

Triple Trunking What’s IncludedContents Contents Your Scanner Volume / OFFTo attach the supplied antenna Connecting the AntennaAttaching the Belt Clip Batteries Powering Your ScannerTo charge batteries To install batteriesTo use an external power source External PowerHeadphones and Speakers To lock the keypad Keytones and KeylockBacklight and Contrast To set the keytoneTo change the display contrast To change the backlight modeSquelch and Attenuator To turn on the backlightTo set squelch To set the attenuator modeTo turn the delay on / off Scanner SetupDelay To define a channel Defining a ChannelTo copy a frequency Copying a FrequencyTo delete all saved frequencies in a bank Deleting Saved FrequenciesTo delete a saved frequency To save a Ctcss or DCS code Scanner CloningTo define a channel’s Ctcss or DCS code To activate Seek Search SearchingSeek Search To clone the scanner dataTo search preprogrammed search banks Search BanksTo search banks SR0-SR2 ZeromaticTo program the search range of Bank SR7 Signal StalkerProgramming a Search Range To activate ZeromaticTo use Signal Stalker Special Signal StalkerTo review and unlock frequencies To use Special Signal StalkerLocking Out Frequencies To lock out a frequencyTo save a frequency found during a search Saving Found FrequenciesTo unlock all frequencies in a search bank To locked out a channel ScanningLocking Out Channels To scanTo review all locked out channels To turn on the priority featurePriority Scanning To modify the Priority channel Weather AlertsTo make an existing channel a Priority channel To program a Fips code Same Standby ModeTo perform a weather scan To program a weather channel into priority channelTo review stored Fips codes Code. The format of a Fips code isTo test the weather alert SkywarnTo enter Same standby To find a frequency to monitor MonitoringTo use Skywarn To monitor a channelTo define a Trunking Bank Trunking SetupTo set a default tuning frequency Defining a Trunking BankTrunking Modes Motorola Trunking SetupTo set Open or Closed mode for a bank To program a fleet map Fleet MapsFor Motorola Type II, enter Base and Offset FrequenciesUHF-Hi 806-960 MHz To program 800 MHz Motorola trunking Edacs Trunking SetupTo save a correct Home Repeater LTR Trunking SetupTo search for Talk Group IDs Searching for Talk Group IDsSaving a Talk Group ID To define a Talk Group ID Deleting Talk Group IDsTo delete ALL talk group IDs in a bank Saving Trunking ChannelsTo delete a Talk Group ID To change the scanning direction, press  or  Trunk ScanningTo lock out Talk Group IDs Trunking DelayTo set a Talk Group ID delay Locking Out Talk Group IDsTo turn off a sub-bank while scanning Turning Off Sub-BanksTo review locked-out Talk Group IDs To turn off a sub-bankTo set Talk Group ID Hold Scanner MaintenanceTalk Group ID Hold Text TagsPage Working at all TroubleshootingTo display the Talk Group ID Scanner is notDoes not scan Scanner does notReceive any stations Or reception is poor Scanner is on butBirdie Frequencies To initialize the scanner Service and RepairInitializing the Scanner Scanning Legally FCC Notice Appendix B Search Banks ReferencesAppendix a Glossary Search bank SR1 CB band Receive mode AM Search bank SR2 FRS/GMRS/MURS band Search bank SR4 Aircraft Receive mode AM, FM Ctcss Codes Appendix C Ctcss / DCS CodesDCS Codes Appendix D Signal Stalker BandsAll Band PubSafety Band To use AFS format Appendix E Talk Group FormatMotorola 406-512 MHz 764-960 MHz Appendix F Specifications9V DC Preprogrammed Frequencies AddendumPurple DOT Purple DOT BB Business Band Police Departments Police Dept Nascar Track Announcer Security Alarm Security Company Companies DOT Business Band DOT BB Limited One-year Warranty