Weak current College】 【modernized Hotel Hotel public broadcasting system design --- Power By】 【China power house network.

<br> First, the system of functional design <br> In accordance with the international fashion trends, hotel, hotels of the public broadcasting system background music broadcasting system and fire emergency broadcast system. Under normal circumstances, the public broadcasting system in addition to .play background music, broadcast, soundtrack broadcast notification systems feature, when it encounters a fire alarm, the scene of the region achieve automatic selection or manual selection for emergency broadcast. <br> According to Chinese fire prevention system specifications, multilayer, high rise buildings .fire broadcasting system must have a layer for a broadcast area. To this end, we at the design hotel, hotels of the public broadcasting system, it must comply with the relevant provisions of the broadcast by floors. <br> Considering that parts of the .building or area it is necessary to set up their own sound sources (such as the hotel gym, cafe, senior clubs, etc.), and the special equipped with emergency radio switch or with emergency radio switching zone volume controller. Normally, these regional .broadcasting itself, fire emergency, automatically forced entry to the building of public broadcasting system priorities of fire emergency broadcast. <br> Considering the hotel, hotels of each floor, regional functions and requirements vary, so that the public broadcasting system on all floors, .regional and Office settings with independent volume control features volume control. To meet the requirements for fire broadcasting all volume controllers should have the emergency switch (strong cut) feature, ensure that the fire emergency broadcasting State to achieve maximum volume broadcast. <br> According .to Chinese fire prevention system specifications, hotel, hotels are important for fire prevention, therefore, the public broadcasting system is necessary to set the State of emergency the linkage controller, thus achieving in the broadcasting system is down, in case of emergency, the system .can automatically turn on, and automatically enters the emergency broadcast status. <br> Hotel, hotels of the public broadcasting system should also contain room broadcast system, star hotel, hotel rooms broadcasting system is typically set 4 programs for residents choose to listen to. .<br> Room 24 / 7 broadcasting system in addition to playing the music of sweetly, you should have a fire emergency broadcast function, when the building accident, room broadcast system to automatically access hotel, hotel public broadcasting system, on the accident area fire .emergency broadcast. <br> Each room's speaker volume by bedside control panel size, bedside control panel should be equipped with emergency radio switch, ensure that the emergency broadcast, jump volume controller to achieve maximum volume broadcast. <br> Second, the system's device .configuration <br> 1. the program source <br> Room broadcast system program source is typically set four: 2 digital tuner, 2 CD player. AM / FM tuner typically use quartz PLL digital tuner to receive stable, can store multiple AM / FM .radio programmes. CD-selects multiple disc CD player, advance into more than one CD, all the tracks may advance programming loop. <br> In addition, the radio microphone usually choose desktop Gooseneck microphone Bell, ease of operation, the built-in .clock generator and speak the former may make crisp Bell, to remind the audience attention, primarily for use when broadcasting notifications; hotel, hotel background music system and room sharing programmes broadcast system. <br> 2. The preamplifier <br> In accordance with .the General room radio system design, set 4 program source, with 4 preamplifiers or 2 dual-channel preamplifiers. To improve system efficiency, special selection AMAPA2000 four-channel preamplifiers. To this end, the entire system only needs to configure 1 PC AMAPA2000 four .-channel preamplifier to meet requirements. <br> 3. emergency radio pagers <br> To meet the public broadcasting system to combine fire emergency broadcasting of special requirements, equipped with five-channel emergency pager AMAEC999 enables background music broadcasting system and fire emergency broadcast .system. EC999 five channel emergency pager, multifunctional, simplistic design, easy to operate, applicable to all types of public broadcasting system. <br> 4. shows the signal distributor <br> In order to ensure the program in the best State transfers to .the former level after level of signals and equipment for optimal signal match between the former level signal driving multiple power amplifier should be equipped with the signal distributor. The signal distributor AMAPD2108, with all the programming signal input, eight-way signal distribution output function, .input and output signal level independent regulator, the LED signal level indication; input and output signals using international universal XLR (Canon) balanced socket connection between the system device. <br> 5. the power amplifier selection <br> Typically, hotel, hotels .of the area is larger, the number of speakers also compare and broadcasting system are the property of work long hours, taking into account the fact that the heat dissipation of power amplifiers and system of operation stability, power amplifier selection, usually before and after the .structure as fan ventilation and cooling of power amplifier, not natural cooling method of selection of power amplifier. <br> Currently used for broadcasting system power amplifier with two types of fixed resistance type output, such as output resistor 250 Ω, requires a connection of .multiple load speakers must be calculated by impedance converter, with, to ensure that multiple load after impedance speakers in parallel is equal to or close to 250 Ω, in order to achieve the best match. Another is the constant pressure-type output, international common .criteria for output 100V or 70V, domestic products output for 120V. As the only broadcasting with speakers are equipped with the size according to their own power of transformer, so using fixed-output power amplifier connect multiple load speakers, just like the installation of lighting .a bulb, a parallel connection is convenient, therefore, has become the broadcasting system of the device configuration. <br> To facilitate the day-to-day maintenance and improve the equipment of interchangeability, should not be broadcast systems often use large output power .amplifier (500W, 800W, for example), and the uniform use of 150W, 240W, 360W power amplifier output power. <br> 6.Broadcast zone control system equipped with <br> According to the determined by the broadcast area, equipped with .AMAZS-801 broadcast region selector, AMAZC-802 broadcast regional switch and emergency broadcasting AMAES-803 shall constitute broadcasting division controller control system. Broadcast zone control system, to broadcast regional AMAZC-802 load switching unit to control the power amplifier and speaker load switching .between, ZC-802 broadcast regional switch has 8 Road area switching, for every road load power 200W switch per channel area, has LED indicates the status of work; input with 15-PIN socket and ZS-801 or ES-803 connection. < .br> AMAZC-802 broadcast regional switch and ZS-801 broadcast zone selector to accept ZS-801 output region selection signal, realize the broadcast area of manual selection, automatic load switch; ZC-802 broadcast regional switch and emergency broadcasting controller connected ES- .803, accept ES-803 output region selection signal, realize the broadcast area of automatic selection, automatic load switching. The entire system is simple and reliable and stable. <br> 7. broadcasting partition fire control system <br> Typically, a high .-rise building fire safety systems in addition to the fire room placement host, on every floor of the weaknesses of the shaft is set inside the floor fire control box, used to receive Club smoke-alarm signal. State of emergency, floor fire control box .is used by public bus to the host communicates the alarm information, while providing floor fire control signal for the trigger control floor alarm bell, startup, fire-fighting equipment exhaust fan (fire control system in accordance with the specifications in China, fire control signal .standard for positive and negative polarity of DC 24V signal). <br> In General, floor fire control box by configuring the linkage module that provides multiple sets of fire control signal interface. At the same time, in the Centre of the engine room fire ., fire host or you can configure the linkage module, provides each floor fire control signal. <br> China fire safety system specification requirements, fire emergency broadcasting range must be N ± 1 floor, that is, building n-tier a fire emergency, .fire emergency broadcasting must be able to n-tier and n-tier of the top and bottom of adjacent floor simulcasting. Therefore, in connection with emergency radio controller AMAES-803, every floor of fire control signal must be accurate to ensure accurate report phenomenon .appears. <br> 8. room broadcast system for fire control <br> Considering the hotel, hotels of each floor, regional functions and requirements vary, so that the public broadcasting system on all floors, regional guest rooms and Office settings with independent volume .control features volume control. To meet the requirements for fire broadcasting all volume controllers should have the emergency switch (strong cut) feature, ensure that the fire emergency broadcasting State to achieve maximum volume broadcast. <br> Each room's speaker volume by bedside control panel .size, bedside control panel should be equipped with emergency radio switch, ensure that the emergency broadcast, jump volume controller to achieve maximum volume broadcast. <br> 9. the number of speakers <br> Strictly speaking, for background music system speaker configurations, .there is a whole set of formulas you can deduce the calculation. However, because it involves a lot of parameters, a wide range of decoration and there are many uncertain factors that cause the calculation results widely. To this end, in a real project design ., often preventing propagation is Jane, follow a more popular way to make the speaker volume configuration. <br> In General, for the relatively large size of environmental noise (such as shopping), each speaker (by 3W high power calculation, floors 3 .-5 meters) coverage for 20-30 square meters; for environmental noise is relatively small (such as hotel lobbies), each speaker (by 3W high power calculation, floors 3-5 meters) coverage for 40-50 square metres. <br .> For narrow aisle, generally 5-8 meters spacing settings 1 only speakers. The more narrow aisle, layer gaoyue low, in order to obtain good to listen to the effect that the speaker settings of gap should be smaller. <br> For advanced .hotel, hotel outdoor courtyard and garden, to get the acoustics of sweetly, multipoint outdoor all-weather loudspeaker cloth, and strive to achieve a sound field tends to be more uniform. General 20 m spacing settings 1 only speakers, each speaker's coverage of 200 .square meters or so. <br> 10. the speaker selection <br> For hotels, guest houses, public broadcasting system, the speaker selection is very important. Hotels, guesthouses, senior office building in general more quiet, request speakers sound mellow and .soft, clear sound, you must also have a beautiful appearance. <br> Depending on the system design is determined by the number of speakers, as well as every AMA speakers distribution power, you can calculate the power loss of all speaker (speaker power .loss refers to the electrical signals in the speakers convert sound signal on the consumed power). Determine the required output power is calculated from the speakers after the power loss, coupled with the power line transmission loss. <br> In the project application, to .accurately calculate the power line transmission loss is often difficult, often based on actual use broadcast cable length select one line transmission loss coefficient μ, to calculate the power output of the system. System output power = line transmission loss coefficient μ × speaker power loss. .Line transmission loss coefficient μ usually under each amplifier actual use broadcast cable length (m) and line transmission loss coefficient μ to determine. <br> 11. room broadcast system of calculating output power <br> Hotels, hotel rooms broadcasting system design by four .sets of programs, each program room speaker power loss, according to the probability distribution of the theoretical analysis, each rooms is not possible at the same time listen to the same set of broadcasts. Therefore, in order to improve the economics of the system device .configuration, usually in accordance with each program utilization coefficient K = 0.5 to calculate the loss function rooms speakersRate. <br> For example, a hotel has a total of 280 rooms, each room configuration AMA602 speaker unit, room broadcast system in each program, .in-room speakers on the loss of power to 280 only × 5W/1400W, follow only = utilization coefficient K = 0.5 calculation, each program broadcast, in-room speakers power loss on a 1400 × 0.5 = 700W. Must be able to n .-tier and n-tier of the top and bottom of adjacent floor simulcasting. Therefore, in connection with emergency radio controller AMAES-803, every floor of fire control signal must be accurate to ensure accurate report phenomenon appears. <br> 12. the .amount of power amplifier <br> According to the speakers, the total power, in accordance with the allocation of the power amplifier output power, you can calculate the required number of equipped with power amplifier, considering reasonable power matching and power reserve, the actual .configuration of the quantity should be based on overall system configuration power amplifier number 1-2. <br> 13. choice of broadcast transmission cable <br> In the public broadcasting system engineering construction process, people often focus on related equipment supporting it, rather .than on broadcasting transmission cable choice. In fact, for a public broadcasting system, to obtain satisfactory sound effects, but should be equipped with high-quality broadcast equipment (amplifiers, speakers, etc.), broadcasting transmission cable is good or bad, to .some extent also affect sound quality. <br> Conclusion <br> For a hotel, hotel public broadcasting system, room broadcast system is essential. Room broadcast system usually sets the multicast signals for guests choose to listen to, star hotel, hotel rooms broadcasting .system at least 2 set of broadcast signals, more then 4 set of broadcast signals. Therefore, how to better and how to select and design a good hotel, hotel is very important. <br> <br> <br>.