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Antenna detect all frequency but why you can see only one channel?
Wiki User
∙ 13y ago
A: The antenna is designed to receiver a specific band of frequency but the receiver will discriminate all signals except the one of interest otherwise all channels will fight for dominance
Wiki User
∙ 13y ago
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Up to which frequency does the gain of an antenna increase as the frequency increases?
In general, an antenna is "cut" or "built" for one frequency, or for a band of frequencies centering on one particular frequency. This antenna will respond to all frequencies, but will only exhibit "maximum" gain at one frequency. Frequencies higher or lower will not be received quite as well, and the farther from the "tuned" or "center" frequency the signal is, the less gain the antenna will provide on that frequency. As we work with an omnidirectional antenna, we can "tinker" with it a bit in an attempt to get it to work with a broader range of frequencies, but as we broaden the usable spectrum over which it will work, we will see less gain on the "center" frequency. If you're getting the idea that tuning an antenna involves trade-offs, you're getting the right picture. No improvements are possible without "cost" in another part of the operating spectrum. If we move to a directional TV antenna like, say, one of those antennas (not the dish) that still can be seen on some rooftops, we see what is basically a modified log periodic antenna. This antenna will generally be "pointed" or "aimed" in the general direction of the transmission antenna of the station(s) for which reception is desired. Stations with broadcast antennas to the side or the rear of this antenna won't be "seen" as the antenna is highly directional. Having said all that to get you up to speed on some fundamental concepts of the antenna, as we move up the frequency spectrum (starting "low"), the gain of the antenna will increase until we reach the "center" or the "tuned" frequency for that antenna. After that, increasing the frequency will result in signals with increasingly lower gain.
On a Motorola portable radio what is the difference between channel and frequency?
Not only on Motorola Portable radio, but in all radio communications: Frequency is number of cycles (full change circles) per second. When radio device operates on some frequency it requires band of adjacent frequencies to be able to transmit modulation (information) too. To avoid mixing, next transmitter must take some "distance" (higher or lower frequency) far enough from frequency of the first one. According to regulations basic frequencies are "named". Channel number is the name of its frequency given by communication regulations. For example, TV UHF channel 21 takes all frequencies from 512 to 518 MHz (megahertz), channel 22 from 518 to 524 MHz, and so on... CB Radio channels 21 and 22 occupy frequencies from CB band, not from TV band. Tables of channel frequencies within various bands can be easily found by search engines.
Does a frequency counter help a cb radio that much?
For CB's that are both modern and "legal" a frequency counter does not help much at all. However if you have an older radio with continuous tuning (dial with a needle) or are tuning "out of band" (using an illegal modified CB) you may find a frequency counter very useful. No,All the frequency counter does is match the frequency to the radio, to tell you how accurate the radio is, if it is a quality radio it is a waste of time for a more efficent CB radio you would want a RF meter to match the antenna to the radio, this would give you max signal when you key the mike, most of the radios that I have ever used have a signal strength right on the radio. All radios are designed to reject all frequencies except the one it's tuned to. Transmitter accuracy and receiver accuracy are both important for clear reception. CB radio uses 26-27 Mhz with a channel spacing of only 10Khz. If your transmitter's frequency is 5Khz too high and the person you're trying to talk to has a receiver that is a few Khz too low, you may not be able to talk to them at all or the sound will be distorted. All radios can be aligned. Better quality radios will not necessarily hold that alignment better. Antenna matching will affect how strong the signal is but not the frequency accuracy of that signal. A frequency counter will tell you what frequency you are on. It does not help the average CB radio. But it does do a lot for modified cb's with extra channels. A Frequency counter also comes in handy if you are talking on side band, it helps you remember where to set the dial, and makes tuning someones signal in much easier. A Frequency counter will help if you need it. If you dont need it it is a waste of money. ~TeZ~
Do only adults don't know Disney channel?
Adults totally do Disney Channel.
What show is ytv on tv in the United States?
its not a channel in the us its only a channel in Canada
What is the cw channel frequency?
this channel is only for USA...
Television can only get channel 8?
Something wrong with antenna.
Is Disney Channel accessible with an antenna?
No. Disney Channel is only available through a cable or satellite TV package.
What channel is AMC on antenna?
The American Movie Channel (AMC) is usually only available on cable, broadband, satellite, etc.
Up to which frequency does the gain of an antenna increase as the frequency increases?
In general, an antenna is "cut" or "built" for one frequency, or for a band of frequencies centering on one particular frequency. This antenna will respond to all frequencies, but will only exhibit "maximum" gain at one frequency. Frequencies higher or lower will not be received quite as well, and the farther from the "tuned" or "center" frequency the signal is, the less gain the antenna will provide on that frequency. As we work with an omnidirectional antenna, we can "tinker" with it a bit in an attempt to get it to work with a broader range of frequencies, but as we broaden the usable spectrum over which it will work, we will see less gain on the "center" frequency. If you're getting the idea that tuning an antenna involves trade-offs, you're getting the right picture. No improvements are possible without "cost" in another part of the operating spectrum. If we move to a directional TV antenna like, say, one of those antennas (not the dish) that still can be seen on some rooftops, we see what is basically a modified log periodic antenna. This antenna will generally be "pointed" or "aimed" in the general direction of the transmission antenna of the station(s) for which reception is desired. Stations with broadcast antennas to the side or the rear of this antenna won't be "seen" as the antenna is highly directional. Having said all that to get you up to speed on some fundamental concepts of the antenna, as we move up the frequency spectrum (starting "low"), the gain of the antenna will increase until we reach the "center" or the "tuned" frequency for that antenna. After that, increasing the frequency will result in signals with increasingly lower gain.
Which radar system can only detect objects approaching or moving away from the receiver?
Frequency-shift
Is the receiving antenna radiate radio wave during reception?
A receiving antenna does "re-radiate" some of the power it receives, but not all. Some of the power it receives proceeds into the receiver ... which is the only way we detect the signal being received by the antenna.
Can a uhf vhf antenna receive FM radio broadcast?
Any antenna can receive anything, but not very well unless it's the correct length for the frequency you're trying to receive. Yes, this antenna will work well so you will not need a special FM only antenna.
Transmission allows only one channel at a time?
Could you be more specific? What type of transmission is it? If it is transmission via waves (like radio), then you can have multiple channels. Each channel rests at a different frequency. To read the channel, you must tune your equipment to the specified frequency.
How is modulation used?
To hear a radio 100 of miles away from the source when the frequency is 1000kc it would require antenna of tremendous size and bulk. So the idea is to transmit a very hi frequency and vary that frequency by 1000kc and then get rid of the carrier frequency and hear the modulation frequency only or 1000kc in this example.
When you key up your mic the red antenna light does NOT come on as soon as you talk it does Why?
Some transmission modes send no power to the antenna if you are not speaking. If the antenna light is sensing radio frequency energy, it will come on only when you speak. This applies to single sideband (SSB). AM and FM transmitters send power to the antenna all the time.
Is the Pokemon music channel the same as the pokeflute channel in Pokemon soulsilver if not help?
The pokeflute channel is a completely separate channel on the radio you can only tune into it in kanto put the frequency almost near the top to find it.
