Tip 1: How to tune into one frequency
Tip 1: How to tune into one frequency
In order for radio users to communicate with each other, their devices must be set to one frequency. The way this configuration is performed depends on the design of the radio stations used.
Instructions
1
First of all, make sure that you use portable radios Permitted for use in the territory of the country where you live. In the Russian Federationportable radios these are LPD standards stations with an output power of up to 0.01 watts and a PMR with an output power of up to 0.5 watts. Recently (since November 2011) they have been added portable radios standard C-B with an output power of up to 10 watts. All these portable radios it is enough to simply purchase, and register themnot necessary. Also in our country it is possible to use radio stations of amateur bands, but only after a rather complicated procedure of receiving the callsign and category.
2
Before setting up the station for one or another frequency and work at this frequency for transmission,make sure that this frequency is within the range that is allowed to work. Stations with a fixed set of channels are usually arranged so that they can be tuned to an out-of-band frequency simply does not work out. But there are exceptions. So, for some expensive CBC standard walkie-talkies some of the channels overlap with the amateur 28-MHz range. It is prohibited to work on these channels for transmission without permits. If the station is amateur, then it is reconstructed usually smoothly or in small steps, and the set of frequencies and capacities, in which you are allowed to work, depends on the so-called category.
3
Such an aspect is also important. If your station is multi-band, and the antenna is designed only for a certain range, it is not recommended to work on it for transmission in other bands categorically, even if you have the right to do so. The radio can damage the output stages of the transmitter.
4
If the radio station has a smooth band override with the help of a vernier, set it to frequency, close to the one on which the friend is set upstation. Let its owner transmit something. At this time, while working at the reception, adjust your station more accurately by the maximum signal (with amplitude modulation), no distortion (with frequency modulation) or natural sounding of the voice (with single-band modulation). If you have a fine adjustment knob, be sure to use it.
5
A station with analog tuning can beis equipped with a so-called digital scale. If it is, setting the operating frequency is greatly simplified: just get the indicator readings corresponding to this frequency. Equally convenient is the optical scale, which is almost as good as digital.
6
Stations with frequency synthesizers usually allowEnter this parameter in several ways. If the frequency is known accurately, enter it directly with numbers from the keyboard. Or adjust the station with a so-called valcoder - an electronic-mechanical emulator of the tuning knob. The frequency is displayed on the screen.
7
Station with a fixed set of channelsSet up using the arrow buttons. One of them reduces the channel number, the other increases. The instruction indicates which channel number corresponds to which frequency.
8
If the station has a fixed setting forone channel, communication between two such devices is possible only if these channels are the same. Some imported single-channel production stations of the early nineties are designed for the use of replaceable quartz resonators. Be sure to turn off the radio before changing them.
Tip 2: How to increase the power of the walkie-talkie
The use of radio communication so-calledThe "civil band" (CB) in most countries is practically unregulated and is available to ordinary citizens without obtaining a license. At their core, C-B communications are portable or stationary radio stations that differ from professional devices in fewer functions. Sometimes there is a need to increase power portable radios. How to do it?
You will need
- RF Amplifier
Instructions
1
To increase the power of the radio station, which is supplied to the external antenna, a radio signal amplifier is used. The amplifier allows to improve the signal quality without introducing distortion into its structure.
2
The radio signal amplifier changes the characteristicshardware only when the device is in transfer mode. The reception of the signal from other respondents will not affect the use of the amplifier. Some manufacturers incorporate amplifiers in the amplifiers that amplify and receive the signal, but together with the amplification of the useful signal, interference amplification also occurs in this case.
3
When connecting the amplifier, insert it into the breakantenna cable, namely between the radio and an external antenna. Connect the amplifier with thick wires to the power supply. If the amplifier is placed in an automobile station, connect the wire to the "positive" terminal of the battery, by protecting it near the terminal with a fuse. "Minus" wire select the same section and minimum length.
4
A large cross-section of wires is required forproviding a possible "subsidence" of the voltage in the power wires, because the amplifier consumes a very high current when operating on the transmission. A short "negative" wire limits the effect of resonance in the supply circuits. This wire must be securely fixed, as its breakage can sometimes lead to equipment failure.
5
Adjust the antenna connected to theamplifier, and keep it in order. Pressing the switch button on the talker when the antenna is disconnected or the cable is damaged may damage the amplifier.
Tip 3: How to adjust the frequencies of all channels
The number of channels in a collective antenna cable can beto reach several tens. By paying a fee for using this service, the subscriber may not even suspect about their number. Find all available channels will help built-in most TVs feature auto search.
Instructions
1
Make sure that the TV in addition to thelow-frequency cables, and a collective antenna cable (either directly or through a VCR, DVD recorder or other similar device). If necessary, make all necessary connections, having previously de-energized all the devices.
2
Connect all the devices back to the network. Turn on the power of each one. Press the Menu button on the remote control. In the menu that appears on the screen, select an item or tab called "Channels" or similar. Then select the sub-item, which, depending on the model of the device, can be called "Auto-tuning" or "Auto-search".
3
The process of searching for all available channels begins -first meter, and then decimeter. This procedure can take up to several minutes. If a VCR and a DVD recorder are included, the frequencies of the modulators built into them are also found. Thus, you will be able to view movies on them both through the low-frequency inputs of the TV, and through its antenna jack. In the second case, the image quality will be slightly worse.
4
When auto tuning is complete, selecttab "Channels" item called "Sorting", "Manual sorting" or similar. The sorting method depends on the model of the TV, and usually it is carried out as follows. Use the arrow keys to select the channel, press the middle button, then use the up and down arrow keys to raise or lower it to the desired location, and then press the middle button again.
5
Set the TV to the channel corresponding to thethe frequency of the VCR or DVD recorder modulator. Each of these devices configure the same way - first by performing an auto search, and then - manually sorting. Then turn off all appliances.
