Telex BTR-800, TR-825 dimensions Display Contrast, LCD Contrast

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Display Contrast

The LCD’s (Liquid Crystal Display) contrast is set from the factory to a standard level. However it is possible for the user to adjust the contrast if desired. The contrast control is inter- nal to the BTR-800 unit near the front panel. The cover must be removed for access to this control. Please see Figure 31 for the location.

BACK

FRONT

R1101	D1101
V

Figure 31

LCD Contrast

7-3

Image 38

Contents JTN Telex Thank you for choosing RadioComTM Table of Contents Tech Tips General Description System FeaturesIntroduction BTR-800 Block Diagram WTA aControls and Connections Front Panel Local Headset WiringBTR-800 Base Station BTR-800 Front PanelControls and Connections Rear Panel BTR-800 Rear PanelBTR-800 Specifications OverallBlank TR-800 Top Panel TR-800 BeltpackControls and Connections Top Panel Headset Jack Wiring TR-800 Rear Panel/Connector/AntennasPush-to-Talk/Push-to-Transmit Switch LCD Liquid Crystal DisplayTR-800 Specifications Blank TR-825 Beltpack Telex RAAudio + Audio a Switched Headphone Ground TR-825 Rear Panel/Connector/AntennasTR-825 Specifications Blank BTR-800 Initial Equipment Set-UpUnpacking TR-800, TR-825Antenna Polarization Antenna PlacementAntenna Connection Distance between AntennasKeeping Site Clear to Antenna Distance Between base station and beltpackOperating System Near Obstructions Antenna Placement Improving Reception and Increasing RangeBase Station Set-up Power ConnectionTransmit Switches LocationInternal Transmit Switches Internal Transmit SwitchesIntercom Switch RJ-11 Type/ Four-wire PinoutRTS Distribution Panel TW5W Example Interface to an RTS TW SystemAudio Board Part Number and Dual Listen Component Locations Parts to be Removed by User to Enable Dual ListenDual Listen Functionality Auxiliary Input/Output Internal Auxiliary Input Routing SwitchAuxiliary Input Routing Switch Relay Contact Jack Adapter Screw Terminal Adapter Relay Output SchematicStage Announce / Relay Contacts Internal Stage Announce Level ControlBase Station Link Cable Base Station LinkTwo Stand Alone Base Stations Connected Together Battery Installation Beltpack Set-up Battery InstallationCharger and battery pack damage May resultTR-800 and TR-825 Rear Panel Transmit modeHeadset Connection Push-to-Talk PT Talk Recommended positionBlank Pre-Walk-Thru Checklist Blank System Quick Start System OperationFrequency Plan Overview Factory-Defined GroupsLocal Headset PowerBase Station Operation Intercom a and BDisplay Contrast LCD ContrastBTR-800 Menu Structure Main Screen Flowchart Beltpack Activity Code Definitions Power-Up ScreenOperating Screen SET Last Rx Changed Group / Channel SelectUP / Down Group / Frequency Select Frequency Edit User-Programmed Groups OnlyClearScanTM ClearScanSpecial Key Sequences Lockout 1st Use DefaultFactory Default CopyBeltpack Operation TR-800 and TR-825 Top and Rear PanelBeltpack Feature Enable/Disable Menus TR-800 Menu Structure Beltpack Menu StructureTR-800 Menu Structure Power-Up Screens Power-Up ScreensTR-800 Menu Structure Group / Channel Screen Group / Channel ScreenTR-800 Menu Structure Transmit Screen Transmit ScreenTR-800 Menu Structure Receive 1 Screen Receive 1 ScreenTR-800 Menu Structure Receive 2 Screen Receive 2 ScreenTR-800 Menu Structure ClearScan ClearScanTR-800 Menu Structure Stage Announce Enable/Disable Wireless Talk Around Enable/DisableTR-800 Menu Structure Audio Channel a or B Disable/Enable Talk Button Latch on/Latch offTR-800 Menu Structure Special Key Sequences Lockout 04A Scn TR-825 Menu Structure Beltpack Menu StructureTR-825 Menu Structure Power-Up Screens TR-825 Menu Structure Group / Channel Screen 704.700 TR-825 Menu Structure Transmit ScreenTR-825 Menu Structure Receive 1 Screen TR-825 Menu Structure Receive 2 Screen Ab SEP TR-825 Menu Structure Audio Output04b TR-825 Menu Structure ClearScanTMTR-825 Menu Structure Stage Announce Enable/Disable SA onTR-825 Menu Structure Wireless Talk Around TA bTR-825 Menu Structure Audio Channel a Options Audio Channel a OptionsTR-825 Menu Structure Audio Channel B Options Hold SET and Press B Continue to Hold SET Press B AgainTR-825 Menu Structure Special Key Sequences Lockout System Walk-Thru Blank Troubleshooting Problem SolutionBlank Frequency Interaction Microphone Gain AdjustmentTech Tips Blank TR-825 Battery InformationBattery Life TR-800 Blank Intercom Systems Specifications CommonBlank Accessories and Replacement Parts Blank Software License End-User License Agreement for Telex SoftwareBlank Certification Information FCC LicensingEU Declaration of Conformity PN 803257-1 Rev. H March Made in U.S.A