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. [. . . ] After the tone is activated, all page line activity is ignored until completion of the adjustment. f:\standard ioms - current release\42004 instr. manuals\42004-364b. doc 11/10 Model 723-905 SmartSeries Remote Subset Amplifier VLC Level Adjustment Pub. 42004-364B Page: 8 of 13 When activated, the VLC overrides the normal volume control setting allowing the amplifier level to change to a preset level during an emergency page. The factory default setting for the VLC Level is 10% of maximum power (nominally 1. 2 watts). NOTE: The system must be equipped with a SmartSeries MCU (Master Control Unit) to activate the VLC function. To adjust the VLC Level: 1. Force the station into the VLC mode by having someone execute a page from a station programmed by the MCU to activate the VLC function. During the page, turn the User Adjustment Control fully counterclockwise, and listen for two beep tones through the page speaker indicating the VLC Adjustment mode has been activated. After the two beep tones, turn the User Adjustment Control to the desired speaker level using the live paging signal to adjust the level. 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. 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. 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). · 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. [. . . ] 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]