Bogen-DFT120-Operation-Manual 电路图 维修手册.pdf

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1、DFT120 Di gi t al Feedback Termi nat or Installati on and Use Manual 2003 Bogen Communi c ati ons, Inc . All ri ghts reserved. Spec i fi c ati ons subj ec t to c hange wi thout noti c e. 54-5036-02D 1205 RadioFans.CN 收音机爱 好者资料库 2003 Bogen Communications, Inc. All Rights Reserved. Noti ce: Every effo

2、rt was made to ensure that the information in this guide was complete and accurate at the time of printing. However, information is subject to change. FCC Statement (Part 15) - Radi o Frequency I nterference The Digital Feedback Terminator generates and uses radio fre- quency energy and if not insta

3、lled and used in strict accordance with the manufacturers instructions, may cause interference to radio and television reception.Testing is being conducted for compliance with the limits for a Class B device in accordance with the specifications in Part 15 of the FCC Rules.This testing is designed t

4、o provide reasonable protection against such inter- ference. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the Digital Feedback Terminator un

5、it off and on, the user is encouraged to try to correct the interfer- ence by one or more of the following measures: -Reorient the radio or TV receiving antenna. -Relocate the Digital Feedback Terminator unit with respect to the radio or TV receiver or vice versa. -Plug the Digital Feedback Terminat

6、or unit into a different outlet so that it and the radio or TV receiver are on different branch circuits. If necessary, the user should consult the dealer or an experi- enced radio/television technician for additional suggestions. The user may find the following booklet, How To Identify and Resolve

7、Radio-TV Interference Problems, helpful.This booklet was prepared by the Federal Communications Commission (FCC) and is available from the U.S. Government Printing Office,Washington, DC 20402. Stock order No. 004-000- 00345-4. I mportant Safety I nformati on Always follow these basic safety precauti

8、ons when installing and using the system: 1. Read and understand all instructions. 2. Follow all warnings and instructions marked on the product. 3. DO NOT block or cover the ventilation slots and openings. They prevent the product from overheating. DO NOT place the product in a separate enclosure o

9、r cabinet, unless proper ventilation is provided. 4. Never spill liquid on the product or drop objects into the ventilation slots and openings. Doing so may result in seri- ous damage to the components. 5. Repair or service must be performed by a factory authorized repair facility. 6. The product is

10、 provided with a UL-CSA approved, 3-wire ground type plug.This is a safety feature. DO NOT defeat the safety purpose of the grounding type plug. DO NOT staple or otherwise attach the AC power supply cord to building surfaces. 7. DO NOT use the product near water or in a wet or damp place (such as a

11、wet basement). 8. DO NOT use extension cords. The product must be installed within 6 feet of a grounded outlet receptacle. 9. DO NOT install telephone wiring during a lightning storm. 10. DO NOT install telephone jacks in a wet location unless the jack is specifically designed for wet locations. 11.

12、 Never touch uninsulated wires or terminals, unless the line has been disconnected at the paging or controller interface. 12. Use caution when installing or modifying paging or control lines. RadioFans.CN 收音机爱 好者资料库 3 Contents Overvi ew. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Features and Capabilit

14、ies .4 Specifications .4 Physical .4 Electrical.4 Environmental .4 Interconnect .4 Panel Descri pti ons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 I nstallati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package Contents.6 Installation Steps.6 Mounting the Unit .6 Operati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7- 8 Page Operation .7 Recording a Pag

18、e .7 Playing Back a Page .8 Override Operation .8 Connecti ons and Swi tches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19、 . . . . . . . . . . . . . . . . . . . . . . 9- 14 Power .9 Override Input.9 Override Control Switch .9 Page In Input .9 Page In Control Switch.9 Audio Out Volume Control .10 Audio Out Impedance Selector .10 Audio Out .10 General Purpose I/O Connector.10 Setting Setup Switches .10 Record Activation

20、.10 DTMF Stripping .11 DTMFControl.11 DTMF Allotment .11 Message Abort .11 Play Mode.11 Pre-Page Tone .11 Number of Plays.12 Play Delay .12 External I/O Connections and Control.13 Abort Control Input.13 Override Control Input .13 Stop Control Input .13 Play Control Input.13 Page In Control Input.13

21、Terminal Block, Output Signals .14 Busy Contact .14 Play Contact.14 Rec Contact .14 Example: System Setup and Connecting to the Paging Systems .15 Li mi ted Warranty; Exclusi on of Certai n Damages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 RadioFans.CN 收音机爱 好者资料库 4 Overvi ew Features and Capabilities The Digital Feedback Terminator has 4 minutes of available audio memory and can record up to 16 paging messages. A single page can have a

23、 maximum length of 1 minute. The unit can record new pages while playing back previously recorded pages. The DFT120 eliminates feedback over the paging system by opening the loop between the input microphone and the speakers. This not only eliminates the potential for acoustic feedback, but also giv

24、es the user flexibility in the manner in which pages are broadcast. Multiple Record and Playback options are supported, as well as Pre-Page Tones, Message Repeat, and Adjustable Delay Between Message Repeats functions. Abort and Stop functions are also available. The DFT120 includes a transformer-is

25、olated 600-ohm page input and priority override input, as well as a transformer-isolated switchable 8-ohm or 600-ohm audio output. Specifications Physi cal Maximum dimension: 10 W x 6-3/4 H x 1-1/2 D Weight: 3 lb. Electri cal Frequency Response: 6.8 kHz, and 60 dB of dynamic range Page Audio Input:

26、600 ohms, transformer-isolated, with -20 dBm to +4 dBm (nominal 0 dBm) input level Priority Audio Input: 600 ohms, transformer-isolated, with -20 dBm to +4 dBm (nominal 0 dBm) input level Selectable Audio Output: Li ne Out put (600 ohms, transformer-isolated, +4 dBm max. continuously adjustable) or

27、Power Out put(8 ohms, transformer isolated, limited to approximately 0.125 Watts into 8 ohms, adjustable) Relay contacts: All control relay contacts available are rated at 1 Amp, 24V DC noninductive loads Power requirement: 12V DC, 1 Amp from wall-mounted power pack supplied Memory Capacity: 240 sec

28、onds, 16 messages max., up to 1 minute max. per message Envi ronmental Capable of operating in ambient temperatures from 0 to +40 C (+32 to 104 F) and relative humidity from 0% to 85% (noncondensing), at altitudes up to 10,000 feet above sea level. I nterconnect All external interface connectors are

29、 RJ11 type and/or two piece screw terminal pluggable Euro-connector type. 5 Panel Descri pti ons 1. Power -Input jack for power connection. 2. Overri de I nput -RJ11 jack for both loop start and dry audio input sources. 3. Overri de Control Swi tch - Selects either dry loop (DL) or loop start (LS).

30、4. Page I n I nput - RJ11 jack for both dry audio and loop start applications. 5. Page I n Control Swi tch - Selects either dry loop (DL) or loop start (LS). 6. Audi o Out Volume Control - Output volume control. 7. Audi o Out I mpedance Selector - Selects either 8-ohm or 600-ohm. 8. Audi o Out - RJ11 jack for Audio Out w/Status Signal Connector. 9. Setup Swi tches -DIP switch settings control unit feature operation. 10.I / O Connecti ons - Various control inputs and status outputs are available at this connector. All I/O connections are electrically isola