Detailed introduction,Wireless surveillance camera PTZ classification structure, function and development trend in future.

Characteristics of use:

Mainly used in the security monitoring field, as the control system of wireless PTZ command, the transmission distance can be up to above 5km. In a set of monitoring system in general only need one can control the front of all the camera. The RS485 interface is a standard connection lines, terminal connection method and cable connecting method commonly used as communication, only need to meet three conditions can realize the front-end and back-end:

Wireless surveillance camera PTZ

1, the communication interface to the same (RS485 or RS232 interface)

2, the baud rate to be the same (1200BPS, 2400bps, 4800bps, 9600bps)

3, to the same parity (odd parity, parity, no parity)

Transmission speed: 1200BPS, 2400bps, 4800bps, 9600bps

Transparent compatible with voice or data signal transmission

The frequency range of 150MHz, 230MHz, 350MHz, 450MHz

Can be set 256 frequency points, each frequency interval 25KHZ (standard)

Development of receiving, sending, digital to analog signal can be transmitted rapidly, switch

Airborne transceiver frequency can be the same frequency, can also be different frequency

Dual phase locked loop, double VCO structure, high stability

The internal use of imported power amplifier module, 5W

The interface uses standard TTL, RS232 (or 485) level, can be directly connected to control the keyboard or personal computer

SMT process, a stainless steel shell, small size, convenient installation, and can be connected to external heat sink

TNC can be directly connected with the antenna interface, antenna

Indicators in line with national standards

Test methods for the technical specifications of the Wireless surveillance camera PTZ “in accordance with the” 90 “series of standards”

There are a lot of, the relevant factor wireless remote transmission distance include: type of antenna equipment, power configuration (shown in the gain value aspect), installation height, antenna using environment are related, from the experience of application of our years, combined with the system type (one-way transmission control, by the main from), we generally recommend the following configuration, can refer to, configuration of the wireless data transmission principle is can directly transmit data on the direct transmission, as far as possible not to build a relay station

Power supply as power transceiver module can be adjusted, the power requirements of power supply under the different transmission power is also different, the general transmitting power is 5W, the power supply capacity to meet 12V 2A, 0.5W power, the power to meet 12V 0.5A. Please select a good power supply ripple coefficient, strong anti-interference capability. If the use of the switch power supply, please note that the antenna as far away as possible from the power supply, because the antenna launch may affect the normal operation of the switching power supply. When the station launch failure, interference check whether the power supply voltage by the antenna and the mutation is one of the methods for troubleshooting

Well connected in the system as a whole, the connection must be carefully checked again antenna, feeder and radio (or module) connection; a data line, a control signal line and a power line connection is incorrect, and ensure the accurate, you can turn on the power to the Outdoor wireless camera. Power measurement of L emission. The power meter series in the transmitting station (or module) and between antennas. After power on the radio (or module) in emission state, observe the indicator lamp status is normal, forward power and reverse power measured meter power while reading. The measured power and the nominal power difference of + 10% is considered normal. Reverse power and positive power ratio should be less than 3%; if greater than 3% indicates that the antenna feeder system and transmitting device mismatch, need to find out why after troubleshooting, and then test the positive, reverse power. Only when the measured reverse, forward power ratio is less than 3% to let the system power long time work. Otherwise, easy to burn the power amplification module.

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post | Comments Off September 12, 2014

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