The wireless module is a module that using wireless technology operation of wireless transmission. It is widely applied to the computer wireless network, wireless communication, wireless control field. For what is the characteristics and properties:
1.Different Transmission interval with different transmission power, ranging from 10mW to 100mW etc. PTZ is generally used in civil 220V AC power supply, the internal converts workable DC power supply , the DC voltage of JZ871 and JZ872 wireless data transmission module general use 3~5V series, power consumption is very low, so has the characteristics of energy saving.
2.ISM band frequency, don't applying frequency point. The carrier frequency of 429-438MHz
3.High anti-interference ability and low error rate. Based on GFSK modulation method, efficient use of the communication protocol, the channel bit error rate is 10-2, can get the actual bit error rate 10-5 ~ 10-6. Transmission protocol PTZ in general is very simple, and the data packet is very short, and usually last Byte is the parity bit, itself has the error correction ability. According to the characteristics of transmission of intermittent communication PTZ and small data packets, the application of wireless module has good maneuverability.
4.Far Transmission interval :The hollowness interval from 300 meters to 10 kilometers. JZ878 in the internal test cases, hollowness transmission interval can reach 8~20km, the actual building at least can penetrate many 12 story reinforced concrete structure building, which can meet the Yuntai good working environment and requirement.
5.Transparent data transmission. The transmission that is received. Has its own protocol PTZ control, wireless module do not any modification and analysis to data packets transmitted , so the communication between platform and the console will not due to the presence of wireless data transmission module needs to change any code, in the hardware communication unobstructed situation,the software do not any modification Can be performed correctly
6.multi channel, multi rate. Provide 16 channel, according to user needs, can be expanded to 32 channels, to meet user demand various communication modes of combination. The number of PTZ monitoring system using actual unequal, if PTZ more than 100 units, the number of head control is also more cases, can be grouped in each group PTZ, using different channels of communication,To avoid packet conflict and ensure the timeliness of communication,Wireless module can be provided from the 1200BPS to the 38400bps and other communication baud rate, and the wireless transmission rate and interface baud rate is proportional to, to meet the needs of the customer equipment on a variety of baud rate. Yuntai baud rate generally use 9600, but also the use of other baud rate, the range of wireless module can meet the requirements of the PTZ.
7.Provide RS232/485/TTL three interface modes. PTZ has been working in general does not hope to re layout, so we need a wireless module can adapt to such a situation, and the current PTZ interface usually RS232 or 485, or both are supported, so the wireless module can well adapt to the PTZ interface, without the change of PTZ hardware can work.
8.Intelligent data control, users need not prepare extra programs. To ensure the reusability of most serial manipulation code maximum. to monitoring system software, the use of wireless transmission mode and wired transmission mode was exactly the same, only need to increase the wireless module in hardware, at the same time to get rid of all the cable lines and equipment can be manipulated, and is also very simple, generally only the wireless module is connected with the upper and lower machine
9.High reliability, small volume, light weight. Uses the high performance monolithic processor ATMega8L, less peripheral circuit, high reliability, low failure rate. Wireless module volume like a matchbox, transformation of the original system size it won't cause difficulties, and even some of the ability of the tripod head manufacturers can be the wireless data transmission module is embedded in the head, make the product more has the leading competitive advantage
10.The watchdog real-time monitoring. In the power down, surge, external interference, system debugging situation, wireless module does not appear problem, as long as the electrify after work, safe and reliable, stable operation.