User manual GAI-TRONICS L3149B

[. . . ] 43004-023C GAI-TRONICS® CORPORATION A HUBBELL COMPANY Model L3149B C200 Advanced Desk Set GAI-Tronics Corporation 400 E. Mohnton, PA 19540 USA 610-777-1374 800-492-1212 Fax: 610-796-5954 VISIT WWW. GAI-TRONICS. COM FOR PRODUCT LITERATURE AND MANUALS CONFIDENTIALITY NOTICE This manual is provided solely as an operational, installation, and maintenance guide and contains sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics retains all intellectual property and other rights in or to the information contained herein, and such information may only be used in connection with the operation of your GAI-Tronics product or system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third party. [. . . ] To run this test, disconnect anything connected to the programming connector on the back of the unit, and short pins 2 and 7 of the connector. Once the short is completed, this unit sends data on the TX wire for receipt on the RX wire. If the same data is received on the RX wire, the unit continues to send data. If no data, or incorrect data is received, the unit stops sending data and displays failure. If the diagnostic functions, but the unit does not operate with a PC or printer, verify with an oscilloscope that the proper RS-232 levels are present. Press TRANSMIT to exit the RS232 diagnostic. PROG 4/8 - Keyboard Diagnostic This diagnostic verifies that the keyboard is operating correctly. After entering the keyboard diagnostic mode, the display shows: KEYBOARD TEST KEYCODE: XX When any key is pressed (except TRANSMIT), the corresponding keycode is displayed. Refer to the keycode table that follows: Button 0­9 * # TRANSMIT MONITOR IC VOLUME Down VOLUME Up Keycode (Hex) Button PROG 1/5 - PROG 4/8 MDC PAGE CLEAR SELECT DOWN UP Keycode (Hex) 00­09 0e 0f No code (Will exit test. ) 11 13 20 21 30­33 45 44 47 46 40 41 Press TRANSMIT to exit the keyboard diagnostic. 39 Installation Model L3149B C200 Advanced Desk Set PROG 4/8 - Tone Level Adjust This mode allows adjustment of the levels of sidetone, the alert, and the page tones: · · The sidetone level used for speaker tones can be adjusted to suit the user. The alert and page tone line levels can be adjusted relative to HLGT. PROG 1/5 - Sidetone Level Adjust Mode This mode allows the adjustment of the sidetone level to -15 dB in 3 dB steps: Button(s) VOLUME Up or VOLUME Down TRANSMIT Sidetone Level Adjust Mode Function: Increases/decreases the sidetone line level. Each time the VOLUME Up or VOLUME Down button is pressed, a beep is generated and the LCD display shows the new setting. Exits the sidetone level adjust mode and returns the unit to the tone level adjustment screen. PROG 2/6 - Alert Tone Level Adjust Mode This mode allows the alert tone line level to be adjusted to -15 dB relative to the HLGT in 3 dB steps: Button(s) VOLUME Up or VOLUME Down TRANSMIT Alert Tone Level Adjust Mode Function: Increases/decreases the alert tone line level. Each time the VOLUME Up or VOLUME Down button is pressed, a beep is generated and the LCD display shows the new setting. Exits the alert tone level adjust mode and returns the unit to the tone level adjustment screen. PROG 3/7 - Page Tone Line Level Adjust Mode This mode allows the page tone line level to be adjusted to -15 dB relative to the HLGT in 3-dB steps: Button(s) VOLUME Up or VOLUME Down TRANSMIT Page Tone Line Level Adjust Mode Function: Increases/decreases the alert tone line level. Each time the VOLUME Up or VOLUME Down button is pressed, a beep is generated and the LCD display shows the new setting. Exits the page tone line level adjust mode and returns the unit to the tone level adjustment screen. 40 Theory of Operation General Desk Set Overview The C200 Advanced Desk Set is a multi-processor design employing state-of-the-art DSP technology to achieve superior performance over typical analog and single-processor designs. The heart of the design consists of U1, the DSP; and U3, the microcontroller. The DSP is responsible for audio processing of receive and transmit audio. This includes notch and line filtering, tone detection, tone generation, audio level compression and setting, and audio routing. The microcontroller is responsible for controlling the functions of the DSP, programming, the LCD display, keyboard scanning, support of the relay and dc modules and general I/O and general operational functions. Receive Audio Receive audio is presented to the desk through the line transformer providing for the necessary load. U14 controls the source of the receive audio: line1 for 2-wire or line 2 for 4-wire operation. The appropriate receive audio is then passed to the gain stage consisting of U21 and U12. U12 provides the compression mechanism used by the DSP to keep the receive audio below the maximum level of approximately ­6 dBm. [. . . ] If a programmable button set to Quick Page is linked to the alias to be deleted, a warning is displayed. If the alias is then deleted, the programmable button linked to the alias is reset to Manual Page. 68 Troubleshooting Troubleshooting the C200 Advanced Desk Sets The following is a list of potential problems you may encounter and possible solutions. Problem General Problems Possible Solution The unit has no LED or LCD display Ensure that the unit is receiving dc power. Check for a blown fuse. The keyboard does not respond. Ensure that the PTT or monitor input on the audio accessory port is not activated. Ensure that the polarity of the PTT and Monitor outputs of the accessory match the software-programmed polarity for the audio accessory port. There is continuous noise in the receive audio. [. . . ]