L the use of the intercom
Press the launch button (also called PTT button) and start to speak, after the speech must loosen the PTT button, otherwise can't hear each other speak. Speech don't have to be loud, otherwise it will cause distortion, voice just from the intercom 3-10 cm with normal speech volume.
L interphone communication distance
General users special care how much is the communication distance between the intercom, actually this is a more complicated problem, not a precise, more can't easily believe that some exaggerated advertisement. Generally speaking, walkie-talkie communication distance depends on the following aspects: a. radio transmission power; The sensitivity of b. walkie-talkie; C. seat to form; D. radio frequency and antenna gain, etc. Power for the 4 w interphone, for example, open links, 3-6 km, in the city or mountains due to the buildings or mountains block, is 1 to 3 km (closer if used indoors). If you want to increase the communication distance, can choose gain higher telescopic antenna. If it is necessary to further increase the communication distance, should consider to build a repeater, erection of trunking communication distance can reach more than 10 km behind the podium. Open band interphone (civil intercom) channel is 20 prescribed by the ministry of information industry, in the 400 MHZ band, no more than 0.5 W, communication distance is bigger than the power of professional intercom to close, city district, 300-1500 meters, open 1000-2000 meters, also can not through the erection of repeater to increase the communication distance.
Using radio for the first time
1, the new battery charging requirements for the first time for 10 to 12 hours, after each time charge 6 to 8 hours (quick charge for 3-4 hours), please don't forget to turn it off when charging, in order to avoid damage of voltage instability interphone, time to stop charging, don't overcharge, lest affect battery life. If equipped with the charger with the function of discharge is recommended for electricity pool every half a month or so to put an electric, adequate electricity, again it can prolong the service life of the battery. If continuous use for a long time (e.g., 24 hours security), suggest with spare batteries. A lot of radios have low voltage alarm can work, should be timely after the alarm for rechargeable batteries.
2, walkie-talkie batteries charging times generally is 300-500, plus the natural aging of cells, so the general walkie talkie battery life between 10 to 20 months (except for lithium battery).
Part 3, intercom has big, small power selection function. In the communication distance is not far from the case, according to actual situation to choose small power archives use, which can prolong the life time of the battery.
4, general intercom has multiple channels, so the two sides before the intercom must channel for good. Encounter interference or disturb others, should be timely change channels or add retuned to prevent frequency interference.
5, some with a keyboard intercom with DTMF dialing function, which can be selected for a person or a group of people have a choice to call, but others on the same channel does not hear, also could not send (if you choose the function of busy bans). Without a keyboard type interphone are generally kind, you talking to any one, could be heard all the others of the same frequency channel, also can get in a word.
Intercom use common sense
1, different companies, different models of intercom as long as the same frequency, the sound/digital the same can also be used to intercom each other.
2, when the radio is sending, keep the interphone in the vertical position, and keep the receiver and the mouth of 2.5 5 cm distance. Launch, intercom at least 2.5 cm away from the head or body. If the handheld radios to carry on the body, launch, antenna at least 2.5 cm away from the body.
3, in use process not to boot off many times, at the same time the volume adjustment to fit your audio volume.
4, general intercom has multiple channels, so the two sides before the intercom must channel for good. Should be replaced in time in case of interference or disturb others channel or get in touch with us.
5, don't to change the parameters of the radio set, otherwise may cause frequency and function disorder, cause the intercom can't normal use and maintenance work to bring unnecessary trouble to us.
Six, pay attention to set the volume and mute, otherwise may hear or intrusive noise. Environmental noise big, optional ear microphones, headphones line is fine, don't put the headset line should be paid attention to in use pulled apart or cause drag mark.
Antenna using the matters needing attention
1, can only use the original or approved by the antenna. Unauthorized antennas, modified or added attachment it might damage the interphone antenna or in violation of the provisions of the radio administration bureau, the ministry of information industry.
2, when use, do not use hand to pick up the antenna. Can't carry the antenna to jilt to jilt to the machine.
3, in the use of the radio antenna can't back off, otherwise easy to burn out the power tube during launch.
4, do not use the damaged antenna. At launch, if damaged antenna skin contact, may cause slight burns.
5, walkie-talkie antenna and transmitting frequency are joined together, cannot use the different frequency band antenna, in this way, can damage the intercom or make communication effect.
6, to avoid in the computer, mp3, PDA, u disk and other electronic equipment near (tens of centimeters) high power emission. Avoid long time launch with high power close to the human body.
Battery matters needing attention
1, with the original or approved by the battery.
2, if the metal conductor such as jewelry, key or bead practice hitting a bare electrode of the battery, all battery may cause damage or personal injury. Please beware of is good battery, especially when put it in my pocket, wallet, or other metal container, special attention should be paid.
3, charging shall be carried out in an environment of 5 to 40 degrees. If over the temperature range, the battery life is affected, at the same time may charge under rated capacity.
(4), with airbags in cars, don't put intercom airbag may involve in the range. If the interphone in airbag launch may involve area, once the airbags expand rapidly, intercom may be as great impact injury and the car.
5, in potentially explosive atmosphere environment or situation, unless the intercom is through special certification, such as explosion-proof interphone, otherwise must close the intercom. Potential explosion in atmospheric environment, the electric spark can cause fire or explosion.
6, don't change the battery in a potentially explosive atmosphere environment or on the battery. Install and remove the battery when contact may cause electric spark and cause explosion.
7, near the blasting area and detonator area before, must first close the intercom, lest cause possible explosion.
Intercom routine maintenance
1, intercom after using for a long time, according to the health, control knob and casing is easy to become dirty, please remove the control knob on the intercom, and neutral detergent (do not use highly corrosive chemical agents) and wet cloth clean casing. Use such as stain remover, alcohol, spray or oil preparation and other chemicals are likely to damage to the surface and the shell of the interphone.
2, light to take light put intercom, not portable mobile radio antenna.
3, shall not apply to the attachment, please cover dust cover (if equipped).
4, keep dry. As well as other appliances, interphone must pay attention to the don't use wet hand to touch, don't put inside water seeping into the intercom, otherwise will make radio components damage. When the above condition, users also want to pay special attention to don't add electricity use, don't remove, repair by oneself, must be sent to the professional repair center, please professional maintenance personnel processing. In as far as possible to keep inside the intercom is dry, clean at ordinary times, to maintenance center for periodical index optimization, care.