Display Contrast, LCD Contrast | Telex BTR-800, TR-825 specs

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

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

Contents

JTN Telex Thank you for choosing RadioComTM Table of Contents Tech Tips General Description System FeaturesIntroduction BTR-800 Block Diagram WTA a Controls and Connections Front Panel Local Headset WiringBTR-800 Base Station BTR-800 Front Panel Controls and Connections Rear Panel BTR-800 Rear Panel BTR-800 Specifications Overall Blank 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 Display TR-800 Specifications Blank TR-825 Beltpack Telex RA Audio + Audio a Switched Headphone Ground TR-825 Rear Panel/Connector/Antennas TR-825 Specifications Blank BTR-800 Initial Equipment Set-UpUnpacking TR-800, TR-825 Antenna Polarization Antenna PlacementAntenna Connection Distance between Antennas Keeping Site Clear to Antenna Distance Between base station and beltpackOperating System Near Obstructions Antenna Placement Improving Reception and Increasing Range Base Station Set-up Power ConnectionTransmit Switches Location Internal Transmit Switches Internal Transmit SwitchesIntercom Switch RJ-11 Type/ Four-wire Pinout RTS Distribution Panel TW5W Example Interface to an RTS TW System Audio 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 Control Base Station Link Cable Base Station LinkTwo Stand Alone Base Stations Connected Together Battery Installation Beltpack Set-up Battery InstallationCharger and battery pack damage May result TR-800 and TR-825 Rear Panel Transmit modeHeadset Connection Push-to-Talk PT Talk Recommended position Blank Pre-Walk-Thru Checklist Blank System Quick Start System OperationFrequency Plan Overview Factory-Defined Groups Local Headset PowerBase Station Operation Intercom a and B Display Contrast LCD Contrast BTR-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 Only ClearScanTM ClearScan Special Key Sequences Lockout 1st Use DefaultFactory Default Copy Beltpack Operation TR-800 and TR-825 Top and Rear Panel Beltpack Feature Enable/Disable Menus TR-800 Menu Structure Beltpack Menu Structure TR-800 Menu Structure Power-Up Screens Power-Up Screens TR-800 Menu Structure Group / Channel Screen Group / Channel Screen TR-800 Menu Structure Transmit Screen Transmit Screen TR-800 Menu Structure Receive 1 Screen Receive 1 Screen TR-800 Menu Structure Receive 2 Screen Receive 2 Screen TR-800 Menu Structure ClearScan ClearScan TR-800 Menu Structure Stage Announce Enable/Disable Wireless Talk Around Enable/Disable TR-800 Menu Structure Audio Channel a or B Disable/Enable Talk Button Latch on/Latch off TR-800 Menu Structure Special Key Sequences Lockout 04A Scn TR-825 Menu Structure Beltpack Menu Structure TR-825 Menu Structure Power-Up Screens TR-825 Menu Structure Group / Channel Screen 704.700 TR-825 Menu Structure Transmit Screen TR-825 Menu Structure Receive 1 Screen TR-825 Menu Structure Receive 2 Screen Ab SEP TR-825 Menu Structure Audio Output 04b TR-825 Menu Structure ClearScanTM TR-825 Menu Structure Stage Announce Enable/Disable SA on TR-825 Menu Structure Wireless Talk Around TA b TR-825 Menu Structure Audio Channel a Options Audio Channel a Options TR-825 Menu Structure Audio Channel B Options Hold SET and Press B Continue to Hold SET Press B Again TR-825 Menu Structure Special Key Sequences Lockout System Walk-Thru Blank Troubleshooting Problem Solution Blank Frequency Interaction Microphone Gain AdjustmentTech Tips Blank TR-825 Battery InformationBattery Life TR-800 Blank Intercom Systems Specifications Common Blank Accessories and Replacement Parts Blank Software License End-User License Agreement for Telex Software Blank Certification Information FCC Licensing EU Declaration of Conformity PN 803257-1 Rev. H March Made in U.S.A