User manual GAI-TRONICS 723-905

[. . . ] 42004-364B GAI-TRONICS® CORPORATION A HUBBELL COMPANY Model 723-905 SmartSeries Remote Subset Amplifier Confidentiality Notice This manual is provided solely as an operation, 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. General Information Product Overview The Model 723-905 SmartSeries Remote Subset Amplifier is an intelligent handset amplifier, speaker amplifier, and FSK modem intended for use in GAI-Tronics Page/Party® and SmartSeries systems. The amplifier is an integral part of GAI-Tronics desktop, desk-edge, and flush-mount stations. [. . . ] The station automatically exits the VLC Adjustment mode and reverts to normal operation 5 seconds after the last pot adjustment. Fuses WARNING Do not remove fuses when energized. Replace them with the same type and size fuse. F1 = T. 160A, 250V, 5×20mm, IEC 60127-2 F2 = T. 630A, 250V, 5x20mm, IEC 60127-2 F3 = T. 125A, 250V, 5×20mm, IEC 60127-2 f:\standard ioms - current release\42004 instr. manuals\42004-364b. doc 11/10 Model 723-905 SmartSeries Remote Subset Amplifier Pub. 42004-364B Page: 9 of 13 Internal Adjustments Although they typically require no adjustments, the following volume levels can be set internally: Sidetone Volume and Handset Receiver Volume To make an adjustment it is necessary to remove the assembly from its enclosure and make a temporary connection between the assembly and the enclosure. Refer to Figure 2 for the reference numbers and locations of the adjustment controls. Turn a control clockwise to increase the volume or threshold; turn it counterclockwise to decrease the volume or threshold. The station is now set up to request a download of configuration variables from the MCU. Set the address to 04 for conventional Page/Party® operation or consult the ADVANCE system manual for address assignment information. Plug the assembly back into the enclosure. The station initiates a configuration download request (ADVANCE systems only). The time required to complete the download depends upon system configuration and system activity, but several seconds is typical. Speaker volume needs adjustment Incoming subset handset speech level needs adjustment Acoustic feedback or speech distortion during page or party operation or The user hears himself when speaking Feedback during page only Use the USER ADJ control to adjust the Minimum Level, Offset Level, or VLC Level (as appropriate). Refer to the VLC Level Adjustment section on page 8. Use the RCVR VOL control to adjust the handset receiver volume. Refer to the Adjustments section of this document. · If the problem affects all stations, the line may not be terminated correctly, may have loose connections, or a short to ground. If the problem affects only this assembly, the problem may be with its sidetone setting. Contact the GAI-Tronics Field Service Department. · · · Check within the enclosure for a purple wire on terminal 7: this is the default setting for local speaker mute. If the wire is on terminal 8, then the speaker is unmuted and may be causing feedback. An adjacent speaker could be causing feedback. If an adjacent speaker is the source of the feedback, adjust the orientation of the speaker so that it is not aimed directly at the station. As a last resort, enable the mutual muting function of the station. [. . . ] 62 to 100 dB SPL Offset (above ambient) User Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 48 dB Minimum User Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off; 85 to 125 dB SPL Handset Amplifier Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 5 VRMS nominal into 33-ohm load Frequency Response with 5 mVRMS input (AGC on). . . . . . . . . . . . . . . . . . . . . to 1 kHz Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]