Instructions for wired antenna for top tuner technics năm 2024
FM indoor Show
antenna i.cl. ed) This antenna is normally sufficient for reception of FM broad- casts. FM Indoor antenna (included) /"1,, Adhesive tape _FM outdoor antenna .ot i,,cl.dem The outdoor antenna should be used when using the main unit in mountainous areas or in spaces enclosed by reinforced concrete where the FM indoor antenna (included) does not provide satisfactory reception. FM outdoor antenna (not included) 75-ohms coaxial included) Attach to a wall (using a tape) facing in the direction of best recep- tion. --How to connect an FM indoor antenna-- (_ Pull off the plastic on the tip of the antenna wire. ZZ:E],,1_EE:_Z_ _ (_ Twist the wire and connect as _" shown below. --_'_"_ wire Twist An outdoor antenna should be installed by a qualified technician only. --How to connect a 75-ohms coaxial cable-- (_ Remove a piece of the outer vinyl insulator. 20 mm (25132") (_ Twist the shield braid to expose the core wire. q_).__ q_l__,,,_ Core wire 10 mm (3/8") (_ Connect the shield braid and the core wire as shown at the right. Shield braid wire For best reception sound quality: An FM outdoor antenna is recommended. Disconnect the antenna if an FM outdoor antenna is installed. ? Some key guidelines and hints and tips about antenna installation: what to do, how to get the best performance . . .Installing an antenna correctly is every bit as important as choosing the correct type in the first place. The antenna installation can mean that the antenna performs to its best or to its worst. By adopting a number of key rules and guidelines the best performance can be obtained from an antenna under any given situation. When installing an antenna, some compromises have to be made, but adopting some guidelines or hints and tips will enable the performance to be optimised for a given situation. Antenna installation hints & tips - guidelinesDependent upon the type of antenna to be installed, there will be a variety of different guidelines or hints and tips that are applicable. Some antennas may be domestic television antennas, others may be CB or ham radio antennas, whilst others could be for professional applications. Whatever the type of antenna there are many points to watch, things to think about, and items of good practice that ensure the best performance is obtained from the antenna. There are many different areas where thought needs to be placed into the antenna General antenna situationOne of the most important aspects of setting up any radio antenna is its location. The location of the antenna will govern many aspects of its operation, and therefore the location of the antenna must be determined along with the type of antenna to be used. A number of points associated with the antenna should be considered:
Antenna heightAlthough the height of a radio antenna could be considered under the general situation of the antenna, the height is very important and can make a marked difference to its performance. As a result the various points are considered separately. Increasing the height of the antenna will nearly always improve its performance whether used for HF, VHF, or UHF etc. Interference considerationsInterference caused to ham radio stations and interference cause by them is obviously of great importance. The location of the antenna for the ham radio station can have a significant impact on both aspects of interference. As a result this should be kept in mind when choosing the location for the radio antenna.
Antenna matchingMatching the antenna to the feeder is is particaulrly important if radio transmitters are used and they are to operate effectively with the antenna system. Naturally it is also important for receiving systems as well, but may be not quite as crucial. Radio frequency systems such as antennas, feeders, sources (i.e. transmitters) and loads (i.e. receivers) all have a characteristic impedance. For the system to operate effectively these must match, otherwise standing waves are generated and the power transfer is reduced. To ensure that the overall system is properly matched and is operating correctly a number of measures can be introduced. Often for domestic systems such as TV or radio installations, the relevant matching techniques will be employed to ensure this should not be a concern.
Antenna feeder considerationsThe feeder is an important part of any radio antenna. Its purpose is to ensure that the maximum amount of power reaches its destination, either radio transmitter power reaching the antenna, or incoming signals from the radio antenna reaching the receiver. Any power lost will reduce the efficiency of the whole antenna system. The feeder cost and performance considerations may have an effect on any decision made regarding the antenna, and it is therefore important.
Good earthOne good solution for many ham radio HF antenna requirements is a ground mounted vertical. These and a number of other radio antenna systems require the use of an efficient earth or ground system for it to operate satisfactorily. As the ground system is key to the operation of the radio antenna it is necessary to ensure that the ground system is satisfactory.
Note on antenna RF grounding:Grounding an antenna can be key to its operation, particularly if it is a vertical monopole antenna where the ground forms part of the antenna. Read more about antenna RF ground. Antenna safety aspectsWhen any radio antenna system is installed, whether for ham radio or any other purpose, safety must be one of the major considerations. Sometimes antennas are temporarily fitted up, only to fall down when the wind rises. Home-built antennas are particularly at risk, but even commercially made ones can suffer if they are not installed correctly - and sometimes even when they are. Care must be taken to ensure that there is no chance of the antenna falling and injuring someone. A number of the key points are listed below:
Above all an overriding sense of the safety aspects of radio antenna design and installation must be employed when installing antennas. With the weather being what it is, any risks taken are likely to result in failure before long. It is not worth taking any risks as falling antennas can cause harm to people and to property, and in any case an antenna on the ground cannot be used. Experimenting with radio antennas can be a fascinating area or ham radio. Many ham radio enthusiasts find it a particularly rewarding element of the hobby. Also, experience gained from setting up and testing various types of radio antenna can be very useful, adding vastly to some of the basic guidelines summarised here. It can also be very rewarding when a new antenna performs particularly well, and much better than previous installations. The performance of the ham radio station can be greatly improved and this can often be seen in the results with many distant contacts being made. How does an FM antenna work?How a transmitter sends radio waves to a receiver. 1) Electricity flowing into the transmitter antenna makes electrons vibrate up and down it, producing radio waves. 2) The radio waves travel through the air at the speed of light. 3) When the waves arrive at the receiver antenna, they make electrons vibrate inside it. |