Take this ZN520- 1D as an example to illustrate the intercom function. Turn on the switch knob (also the volume adjustment knob), and the middle knob is the channel knob (16 channel). Press the PTT key (transmit key) and the speaker can hear it (you need to press the PTT key on the same channel, not both sides, otherwise there will be no sound or different channels, but the channel frequency and consonant should be set by FM).
Pay attention to the use of walkie-talkies, and check whether the channels used are correct at any time to avoid unnecessary mistakes.
When using the walkie-talkie, keep the walkie-talkie vertical, and the microphone is 3-5 cm away from the mouth.
When using the walkie-talkie, stay away from the gas filling station and avoid high temperature, humidity, flammable gas and other environments.
When using the walkie-talkie, do not use the antenna of the portable walkie-talkie, which may damage the antenna and affect the call.
Power consumption is high when transmitting, low when answering, and power saving when waiting.
When charging, it is best to charge for the first time for more than 8 hours, otherwise it will affect the charging efficiency and battery life in the future.
Don't switch the machine on and off many times in the process of using the formula, and at the same time adjust the volume to a position suitable for your hearing.
Only the original or approved antenna of Sino-Norwegian walkie-talkie can be used. Unapproved or modified antenna may damage the walkie-talkie or violate the regulations of Radio Management Committee of Information Industry.
The walkie-talkie antenna cannot be unscrewed for use, otherwise its power tube will be easily damaged when transmitting.
Do not use the damaged antenna. If the damaged antenna touches the skin during transmission, it may cause minor burns.
The battery must be the original battery or approved battery of Sino-Norwegian walkie-talkie, and it should be charged at 5-40 degrees Celsius. If it exceeds this temperature range, it will affect the service life of the battery, and it may not be enough to charge to the rated capacity.
To avoid problems caused by electromagnetic interference or electromagnetic compatibility, please turn off the walkie-talkie when the "Turn off the walkie-talkie" sign is posted. Such as hospitals, airports, gas stations and other places.
After long-term use of walkie-talkie, the key control knob and shell are easy to get dirty. Please remove the control knob from the walkie-talkie and clean the casing with neutral lotion and wet cloth. The use of chemicals, such as detergents, alcohol, sprays, etc. May damage the surface and casing of the walkie-talkie.
2. Some common sense of walkie-talkie and radio
1, the frequency band cannot be changed. The determination of radio frequency band was originally generated by a crystal oscillator, and the frequency of this crystal oscillator was determined. The output frequency of the crystal oscillator goes through a series of complicated work of the circuit, and finally produces the working frequency.
So the walkie-talkie of 450-470 cannot be set to 430.
2. The frequency band is determined by the crystal oscillator and transmitter circuit. The antenna cannot determine its own frequency band, and the length of the antenna must be determined by the transmitter frequency band. Too short or too long will lead to the transmission power can not be completely emitted from the antenna, resulting in the antenna tuner temperature is too high, and eventually lead to burning.
3. The frequency band of walkie-talkie is a special frequency band, which is stipulated by national laws and staggered from the frequency band used by radio stations. So no.
3. What are the precautions for wireless intercom operation?
When the walkie-talkie is transmitting, keep the walkie-talkie in a vertical position and keep the distance between the microphone and the mouth at 2.5-5cm. When launching, the walkie-talkie should be at least 2.5 cm away from the head or body.
Don't switch it on and off many times during use, and adjust the volume to the volume suitable for your hearing.
Matters needing attention in the use of wireless interphone.
A. In an environment or occasion with potential explosion hazard, unless the walkie-talkie is explosion-proof with special certification, it must be turned off. In a potentially explosive environment, electric sparks can lead to explosion or fire.
B don't replace or charge the battery in a potentially explosive environment. When installing and removing batteries, contact sparks may occur and lead to explosion.
C. Before approaching the blasting area and the area where the detonator is located, the interphone must be turned off to avoid possible explosion.
4. How to use the radio correctly?
Pay attention to the use of walkie-talkies, and check whether the channels used are correct at any time to avoid unnecessary mistakes.
When using the walkie-talkie, keep the walkie-talkie vertical, and the microphone is 3-5 cm away from the mouth.
When using the walkie-talkie, stay away from the gas filling station and avoid high temperature, humidity, flammable gas and other environments.
When using the walkie-talkie, do not use the antenna of the portable walkie-talkie, which may damage the antenna and affect the call.
Power consumption is high when transmitting, low when answering, and power saving when waiting.
When charging, it is best to charge for the first time for more than 8 hours, otherwise it will affect the charging efficiency and battery life in the future.
Don't switch the machine on and off many times in the process of using the formula, and at the same time adjust the volume to a position suitable for your hearing.
Only original or approved antennas of Eurocom can be used. Unauthorized or modified antennas may damage walkie-talkies or violate the regulations of the information industry radio management Committee.
The walkie-talkie wireless can't be unscrewed for use, otherwise it is easy to damage its power tube when transmitting.
Do not use the damaged antenna. If the damaged antenna touches the skin during transmission, it may cause minor burns.
The battery must be original or approved by Euromonitor, and the charging temperature should be 5-40 degrees Celsius. If it exceeds this temperature range, it will affect the service life of the battery and may not be able to charge the rated capacity.
To avoid problems caused by electromagnetic interference or electromagnetic compatibility, please turn off the walkie-talkie when posting the "Turn off the walkie-talkie" sign. Such as hospitals, airports, gas stations and other places.
After long-term use of walkie-talkie, the key control knob and shell are easy to get dirty. Please remove the control knob from the walkie-talkie and clean the casing with neutral lotion and wet cloth. The use of chemicals, such as detergents, alcohol, sprays, etc. May damage the surface and casing of the walkie-talkie.
5. What should I pay attention to when using the walkie-talkie?
(1) The walkie-talkie will emit electromagnetic waves, which will interfere with the normal work of other electronic equipment and occupy/interfere with the wireless communication channel. Therefore, to be on the safe side, it is best to apply for a legal call sign and apply to the machine inspection Committee for a license to use the walkie-talkie.
(2) The walkie-talkie belongs to electronic equipment and should be waterproof, lightning-proof and collision-proof. Generally don't let it touch water. For walkie-talkies that have not passed the waterproof certification of walkie-talkies, pay attention to prevent rainwater from entering the fuselage in rainy days. Once the rainwater enters the fuselage, immediately turn off the power supply, take out the battery, and send it to a professional for treatment, and then use it after confirming that it can be turned on. In thunderstorm weather, it is best not to use walkie-talkies and turn off their power supply to prevent lightning strikes (pointed objects are easy to attract lightning, and the antenna of walkie-talkies is pointed objects); Don't talk on the walkie-talkie and operate the buttons as gently as possible. It is unnecessary not to operate the keys at will (all keys have a certain life-10000 times/at most 100000 times); It is also necessary to prevent dust from entering the keyboard, which will hinder the conductivity of conductive rubber, so all unused holes should be closed.
(3) Protect the antenna, don't bend the antenna at will, don't turn it on when the antenna is not connected properly, don't use unqualified/inappropriate antenna at will, and don't connect the walkie-talkie by grabbing the antenna.
(4) There is a certain delay between pressing the PTT key and actually sending the signal, and the length of this delay varies with the quality of the machine. So press the launch button firmly, wait for 1 for 2 seconds before speaking, then wait for 1 for 2 seconds before releasing the launch button, otherwise others will not hear you at all. Keep your speech short and to the point, and don't occupy the channel for a long time, because when you are talking, others can only listen. If you leave the machine in the transmitting state for a long time, the machine will get hot, and even the walkie-talkie may be burned out due to long-term transmission.
(5) Pay attention to public ethics when using walkie-talkies, and don't unnecessarily occupy channels for a long time, because walkie-talkies are all in half-duplex working mode. When you speak, you occupy the frequency resources of this channel, and others can only listen, but can't transmit. Even if you transmit, others can't hear you (and it's not good for your machine). This is especially important when large motorcades are driving.
(6) The battery of interphone plays an important role in prolonging its standby time and improving the call quality. Therefore, do not use inferior/expired/invalid/mismatched (voltage mismatch) batteries. At present, lithium battery is the best of all batteries and should be the first choice. At the same time, the battery should be charged according to the correct method and matching charger, and it is best to turn off the power of the walkie-talkie when charging, otherwise it will affect the normal charging of the battery. For lithium batteries, don't overcharge (don't charge for too long, and there will be no electricity when fully charged. Except for the first two or three charges of new batteries), for nickel-hydrogen batteries, it is best to charge them after use.
Another advantage of not leaving the machine in the launching state for a long time is that it can effectively protect the battery and prolong its service life.
If you don't use the walkie-talkie for a long time, don't put it on hold for a long time, turn it on every once in a while (about a month), discharge the battery and then charge it normally, which can also prolong the service life of the battery.
6. What should I pay attention to when using walkie-talkies?
What should I pay attention to when using frequency? How can we use it reasonably and legally? According to experts from the Office of the Provincial Radio Management Committee, attention should be paid to the use of frequency. First of all, we must abide by the relevant state regulations on frequency management, work in strict accordance with the prescribed frequency, and shall not change it without authorization. For equipment with adjustable frequency, be sure to lock the frequency before use.
Secondly, we should work strictly according to the station parameters such as station, antenna height, antenna gain and transmitter output power. When approving the station (network), it is not allowed to send and receive signals unrelated to work. Thirdly, it is necessary to keep the technical indexes of equipment such as frequency accuracy, stability, frequency band width and residual wave radiation in line with the technical standards stipulated by the state, and regularly overhaul the equipment to ensure the normal operation of the station (network).
Fourth, we must pay the frequency occupation fee on schedule.
7. What are the safety precautions when using walkie-talkies?
1. In some cases, the antenna wave emitted by the mobile phone will lead to the explosion of explosives. Users should pay attention to whether there is a sign to disable the receiver when they are near the chemical plant. If there is a sign prohibiting the transmission of radio waves, users must turn off their mobile phones. Otherwise, once a call is made, the radio waves emitted by the receiver may cause an explosion.
2. Never replace the battery or charge it near inflammable and explosive materials. Sparks may occur when installing or removing batteries from the walkie-talkie. When touching inflammable and explosive materials, sparks will cause explosion or fire.
3. Don't use your mobile phone at the gas station. Users had better turn off their mobile phones to prevent accidents.
4. In the car with airbag, don't put the walkie-talkie in the range that may be involved when airbag is deployed. If the walkie-talkie is in the area that may be involved when the airbag is deployed, once the airbag is deployed rapidly, the walkie-talkie may hurt people in the car with great impact.