There are many factors related to wireless PTZ transmission distance, including: the power of the device, the configured antenna type (expressed in terms of gain value), the installation height of the antenna, the use of the environment, etc. are all related, from our many years of application Experience, combined with the type of system (unidirectional transmission control, from master to slave), generally recommended configuration is as follows, you can refer to, configure the principle of wireless data transmission is the direct transmission of data on the direct transmission, as far as possible not to build a relay station.
1. According to the transmission power of the equipment (or module) used, the distance of the transmission distance, select the appropriate antenna type. Commonly used are rubber antennas, sucker antennas, and other high-gain directional antennas or omnidirectional antennas with various gains.
2. Read the antenna instruction manual carefully before installation. There are no special requirements to check if the frequency band and power tolerance of the antenna meet the requirements.
3. The height of the outdoor antenna is determined according to the needs and actual conditions. Should take into account the transmission signal transmission distance, the surrounding interference conditions and the loss of the feeder, not the higher the better the antenna mount.
4. The outdoor antenna should be installed within the 45 degree protection angle of the lightning rod. There should be no metal nearby so as not to affect the emission lobe pattern.
5. The grounding of the outdoor antenna base should be good, the installation can not be tilted, the installation must be firm, can resist wind, corrosion, and strong temperature changes.
<br> <br> simple test when the entire system is connected, the connection must be carefully examined over the antenna feeder, the feeder and radio (or modules) are connected; whether the data lines, control signal lines and power lines connected to bad , and then ensure that no mistakes in order to open the power supply to the system equipment. Transmit power measurement. Connect the power meter between the transmitting station (or module) and the antenna. After the power is turned on, the wireless data radio station (or module) is in the transmitting state. Observe whether the status of each indicator lamp is normal, and read out the forward power and reverse power measured on the power meter. A difference of ±10% between the measured power and the nominal power is considered normal. The ratio of reverse power to forward power should be less than 3%; if it is more than 3%, it indicates that the antenna feeder system does not match the transmitting equipment. After finding out the reasons for troubleshooting, test the forward and reverse power. Only when the measured reverse and forward power ratio is less than 3% can the system be powered up for long periods of time. Otherwise it is easy to burn the power amplifier module.
1. According to the transmission power of the equipment (or module) used, the distance of the transmission distance, select the appropriate antenna type. Commonly used are rubber antennas, sucker antennas, and other high-gain directional antennas or omnidirectional antennas with various gains.
2. Read the antenna instruction manual carefully before installation. There are no special requirements to check if the frequency band and power tolerance of the antenna meet the requirements.
3. The height of the outdoor antenna is determined according to the needs and actual conditions. Should take into account the transmission signal transmission distance, the surrounding interference conditions and the loss of the feeder, not the higher the better the antenna mount.
4. The outdoor antenna should be installed within the 45 degree protection angle of the lightning rod. There should be no metal nearby so as not to affect the emission lobe pattern.
5. The grounding of the outdoor antenna base should be good, the installation can not be tilted, the installation must be firm, can resist wind, corrosion, and strong temperature changes.
<br> <br> simple test when the entire system is connected, the connection must be carefully examined over the antenna feeder, the feeder and radio (or modules) are connected; whether the data lines, control signal lines and power lines connected to bad , and then ensure that no mistakes in order to open the power supply to the system equipment. Transmit power measurement. Connect the power meter between the transmitting station (or module) and the antenna. After the power is turned on, the wireless data radio station (or module) is in the transmitting state. Observe whether the status of each indicator lamp is normal, and read out the forward power and reverse power measured on the power meter. A difference of ±10% between the measured power and the nominal power is considered normal. The ratio of reverse power to forward power should be less than 3%; if it is more than 3%, it indicates that the antenna feeder system does not match the transmitting equipment. After finding out the reasons for troubleshooting, test the forward and reverse power. Only when the measured reverse and forward power ratio is less than 3% can the system be powered up for long periods of time. Otherwise it is easy to burn the power amplifier module.
Automatic Swing Door Operator/Opener
PAD Automatic Doors Technology Co., Ltd. , http://www.shrevolvingdoor.com