Weak current College】 【public broadcasting equipment installation and wiring installation --- Power By】 【China power house network.

<br> <br> First, the radio room equipment installation <br> <br> 1. the location of the broadcast room equipment should be under field conditions to determine, as far as possible, be easy to facilitate heat dissipation, reduce the .device to other devices. <br> <br> 2. prior to the broadcast room equipment installation, ceiling, wall painting, flooring and sound insulation layer works finished; the Cabinet equipment basis finished steel embedded; antennas, ground should be installed, and .the introduction of indoor terminals; inlet ducts reserved position correctly before installation of the equipment. <br> <br> 3. the device out of the box, to serious press equipment list inspection device appearance and its annex, collect save device operation instruction manual .. <br> <br> 4. broadcast room equipment layout should make the watch officer on duty seat can see most of the front of the device, can easily and quickly on the device to operate and adjust monitor run display of each device. < .br> <br> 5. broadcasting room equipment installation to maintenance conveniently, the device should not be too dense. Console and rack room should have a wide channel, and floor-standing spacing of broadcasting equipment should not be less than the General, device .and equipment 1.5m side by side arrangement, should ensure that the interval can be easy to access, to less than 1m. <br> <br> 6. the installation should be smooth, straighten, floor type device application bolts to be fixed, .or use the angle steel reinforcement in the rear wall. <br> <br> 7. for equipment and an outside line, the device should be as close as possible to get an outside line access, while also considering the ease of use. This .type of equipment the best direct device on the wall, his installation height according to root needs. The General ground terminal block device in height 1.8m Office tap Control Panel and power strips installed at a height of 1.2m Department (refer to the enclosure of .the distance from the bottom edge of the ground). <br> <br> 8. the device is installed, its vertical adjustments, adjustments, using hanging xianchui and steel ruler. <br> <br> 9. radio equipment installed in the .interior decoration of wood flooring, the equipment should be fixed in the embedded base steel, and Slipknot, should not be placed on a wooden floor, the wire can be laid in the Groove flooring. <br> <br> Second, conductors <br .> <br> First of all should follow the system configuration, determine system equipment suitable for the installation location, and then determine the alignment of the pipeline (or trough) position and direction. Alignment should avoid parallel with power line, otherwise affect call clarity .and the introduction of interference noise. <br> <br> 1. Select the output cable <br> <br> Generally, the PA system of output cable cross-sectional area should not be less than 0.75mm2. Cable trunking should be in .the lead, or take other measures for effective protection. In the interim while routing, line hanging, relaxation, so it is best to use a heavy-duty cable (1.5mm2), and the best out there and protection measures. <br> .<br> 2, indoor wire laying <br> <br> Broadcasting indoor antenna conductors can be divided into terminal, middle line, line-out, power inlet and grounding line laying. Input amplifier of signal lines, General transport level is very low ., vulnerable to disturbance, interference by amplifier to cry for broadcast quality have a greater impact. Although such lines have been designed using shielded cables, has a strong anti-interference ability, but in the installation should pay special attention to the following two points: .<br> <br> 1. broadcasting room is the strong or weak signal and power cables focal point, the source of interference, shielded cable wire intermediate set intermediate connector is strictly prohibited. <br> <br> 2. in the case of .shielded cables and wires and devices, plug connection to the attention of the shield of connection, the connection should be used in welding, using twisted and wrapped. Welding should be strong, reliable and beautiful. Intermediate wire is used in the amplification devices and power .amplifier device packing equipment, after amplification of the signal with intermediate line in PA equipment, this type of line-level is higher than for line, but still need to be shielded line anti-interference. The connector is not allowed in the middle of a .connector, both ends with plug connection, the connection method for welding (welding wire and plugs). <br> <br> Broadcast room usually have the following line: <br> <br> 1. the floor trunking alignment: <br> .<br> The floor consists of trunking alignment, apply to the device number of lines between devices cross broadcasting studios. Broadcast room floor laying floor or reserved trunking, wires neatly within the reserved area, with lashing line every 1 ~ 1.5M binding once. .Conductor arranged a layer, you can arrange the second layer, the layer should not be binding. Turning radius should be larger than the wire diameter 6 times more. Trunking cover should cover online slot. Wire access floor trunking, should be protected using trunkings. .Trunkings backplane with expansion bolts fixed to the back of the device. Trunkings with ground to make reliable connections. <br> <br> 2. dark pipe laying: <br> <br> Dim pipe laying is commonly an alignment method. It is .the will of steel pipe in the ground or the walls in advance. Sometimes to adoption of pipe laying wiring, concealed ceiling suspended ceiling and wooden floor, then place the conductors steel wear. Pipe diameter according to the laying of wires in pipe cross sectional area ., number and amount of the reservation in the future. Low-voltage lines and a high level as well as power cables, radio output cables dont wear in a tube with. Thread used for the protection of the casing, the box should be in the .wall is embedded. Embedment depth should be determined according to the Panel structure, should enable the device Panel centered around the walls. Line pipe mouth should be smooth and Burr-free. On longer or have two curved parts of the tubes, concealed should wear .steel wire advance to wear cited wires. <br> <br> 3. the prescribed route: <br> <br> In a small volume of broadcasting room can adopt open wire installation, or use plastic trunking or hard tube out wiring. That .assembly line, the line should be kept horizontal even vertical. The room installation height and location should be consistent. <br> <br> 3. school line <br> <br> <br> According to the system diagram, diagram layout better .the cable. Cable and device connection before universal table to check the line name to distinguish good code and check if the line is clear. Each other and with iron pipes between insulationGood. And check each cable, each core wire number is consistent with construction plans .. <br> <br> 4. power supply <br> <br> <br> Broadcast room General settings have independent power strips (box), in middle of distribution by the Exchange (box) some circuit supply various output broadcast equipment AC .power. Power strips (box) is divided into wall-and floor-standing now. Medium capacity broadcast room (500W) generally use wall jointed, such distribution box with four 8 × 70 expansion bolts to be fixed, and construction methods are as follows .: <br> <br> 1. in the concrete or brick wall dashes, and then use the impact drill holes, their location should be the bottom margin to l.5m power distribution; <br> <br> 2. clean hole of .ash, into expansion bolts; <br> <br> 3. using hammer against expanding the casing burst in-; <br> <br> 4. the distribution box installed upright, vertical, tighten the nuts. <br> <br> .The bulk of the broadcast room (stations), generally use floor type power strips, power strips with knife switch controls the total power and tap the power supply, power strips should be installed in the base type, in fact the same as in the foregoing .installation enclosure installation. <br> <br> Power strips (carton) after installation, the control switch of signs should be clear, the circuit number should be complete. The control switch should be flexible and effective action. Broadcasting system to the power supply .voltage and capacity requirements are high, the supply voltage and broadcast sound quality, power strips (box) with constant voltage appliance within Standing, due to the power supply voltage instability, affect the audio signal is distorted, the stabilisers generally greater than the actual capacity .needs to be volume, use without fever. Some of the broadcasting system has production dispatching, fire broadcasting features, you can set the DC battery backup power supply and power exchange. <br> <br> 5, the Cabinet <br> <br .> Public broadcasting system is placed in a standard 19-inch Cabinet. As regards internal partition Cabinet, depending on the amount of equipment. Basically, the basic equipment includes background music broadcasting machine, radio, and the expansion of the machine. For the convenience .of consumers purchase, the standard rack unit height 44.55mm (1.75 inch). This is a standard size also called "introduction HE" or "U". <br> <br> In planning cabinets compartment, the following principles must also be noted .: <br> <br> 1) device mounted on a monitor and keyboard height of front part is moderate. When the operator input program, the monitor and keyboard will be increased to a horizontal position. Therefore, to facilitate viewing and operation, basically .the placement of the system should not be higher than the shoulders. <br> <br> 2) cassette players, monitors, and other commonly used instrument should be placed in easily visible locations. <br> <br> 3) If a power .amplifier system above installed devices, during which should be placed in a layer of thermal protection fences. To protect the system's micro-process control components, without excessive heat damage. <br> <br> 4) when using several power amplifier, the cabinet .cooling fan to help should be installed. <br> <br> 5) if the system is connected too large, it is recommended that you use the power segment sequence switches to decentralized system switch machine load caused power supply or inconvenience. <br> .<br> 6) if the system is connected too large, it is recommended that you bring a wealth of equipment, wiring, and the number of the Cabinet with the name. For easy installation, operation, and maintenance. <br> <br .> Radio equipment of the vents are not closed, particularly amplifier vents need special attention. Because some of the amplifier power consumption up to 100 Watts or more, have a great heat, ventilation and cooling needs. Do not put a device thrown in another equipment .above, unless at least between the various equipment with l / 2 inch above the void. In the family, never identify broadcast equipment near the heating element is not placed near the window, from the direct rays of the Sun. Circuit inside thermal accumulation will .form a high-performance, make changes or damage to the circuit. <br> <br> 6. grounding shield and noise <br> <br> In order to ensure that the broadcasting system broadcast quality and safety of staff, the public broadcasting .system grounding and shielding technologies are crucial. <br> <br> Choose the appropriate cable and connector will help to reduce noise, while cable close together, in the large signal and small signal cable between signal will pass the inductance and capacitance for coupling. .Small signal cable, especially in the microphone and player leads to cable, be sure not to leave it hanging in the 220 volt AC power line above, or parallel, not near placement. Power cables, speaker cables and small signal cable to the location of .the separate neatly on to reduce the possibility of noise interference. <br> <br> Grounding and shielding recommends: <br> <br> 1. grounding, determine an equipment or a system, only a bit of ground. The power of the .total power of the grounding, and then tap to equipment power supply ground. There are many devices may not have the enclosure earthing, also as much as possible to take advantage of its metal enclosure and Cabinet metal shell, to reach the ground. If the .equipment and connection between metal cabinet, you can also take advantage of performing a short connector touches it to determine the connection between good. <br> <br> 2. some of the equipment due to the signal output is not balanced manner, to the .extent possible, use the isolation transformer to convert it to balance the electrical characteristics. <br> <br> 3. where it is not possible to make these changes, as much as possible to shorten the connection between them. <br> <br .> 4. usually equipment will be grounded into electrical earthing and grounding. In this scenario, multiple sets of equipment, it should be noted that straddles may have multiple point grounding of occur. <br> <br> 5. usually equipment (stand- .alone) electrical earthing and grounding is received with a patch cord. If multiple groups of devices are connected, this patch cord to be apart of the equipment and the electrical grounding system earthing circuit separately. <br> <br> 6. transfer audio signals .you need to use a dedicated audio cable. The cable must be very soft, often combined with the shielded, no deformation in the connector service. With welding or crimp manner to make it better with the connector, and doYou may do on a color mark .. <br> <br> 7. power supply properties caused by interference: whatever is the signal cables, speakers or main power, can cause Wireless interference. If possible, try to reassemble the parts, reducing its potential to cause interference. Or filtering ., filtering out particular frequency of a coil. <br> <br> 8. Cabinet interference: sometimes the noise from the main trunk lines and transformers. Therefore, when planning the Cabinet Interior line should pay special attention to the signal transmission line away from .the main trunk lines and transformers. <br> <br> 9.100V speaker line interference: signal line should be separated with 100V speakers line to avoid interference. <br> <br> <br> <br> <br>.