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5KM wireless RS485 data transmitter

5KM wireless RS485 data transmitter

Model:ST-5A-ZS & ST-1A-ZS

Modulation FM
Frequency 220-240MHz
Transmit power  
Wireless mode Point to point
Antenna type External omnidirectional antenna
Support range 2-5KM (LOS)
Function RS485 signal

 

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Features & Application:

Mainly used in security monitoring in the field, as a wireless PTZ command control systems, transmission distance can be up to 5km or more. In general, a monitoring system which requires only a single front-end can control all of the cameras. Interface is a standard RS485 cable, terminal access method and the commonly used method of cable access, as only three conditions can be achieved to meet the front and back-end communication:
1, to the same communication interface (RS485 or RS232 interface)
2, to the same baud rate (1200bps, 2400bps, 4800bps, 9600bps)
3, to the same parity bit (odd parity, even parity, no check)

Transfer rate: 1200bps, 2400bps, 4800bps, 9600bps
Compatible voice or data signal transmission and transparent
Frequency range of 150MHz, 230MHz, 350MHz, 450MHz
Frequency can be set to 256, each frequency interval 25KHZ (standard)
Receive, send one, send digital and analog signals Jie Ke, switch quickly
Can send and receive frequency of air with frequency, but also different frequency
Double loop, double-VCO structure, high stability
Internal use of imported power amplifier module, 5W
Interface uses standard TTL, RS232 (or 485) level, you can directly control the keyboard or personal computer connected
SMT process, stainless steel shell, compact, easy to install, can add heat sinks
Built-TNC antenna interface directly with antennas
Indicators in line with national standards
Specifications in accordance with test methods used, “Mobile Communications” 90 “Standard”

ST-5A-ZS waterproof wireless PTZ controller can control up to 5 km distance. Interfaces used in video surveillance among 485 commonly used, can control the keyboard, hard disk video recorder, DVR, etc. compatible. Simple, it is only responsible for signal transmission, only need to take control of the baud rate and the same device can be, all operating and monitoring the same cable, no less complex thought. So deeply Contractors of all ages. Compatible with the instruction to receive equipment TY-0.5A-YK, in a control system, the controllers only need one, there are several fixed points (head turning, zooming the lens closer to) the distribution of several TY-0.5A-YK can be, the interface also uses 485 commonly used form of the operating voltage 12V DC, only with the decoder phase, baud rate and protocol address code can be fine work.

Wireless transmission distance of the head there are many factors, including: equipment, power, the configuration of the antenna type (performance aspects of the gain value), the antenna installation height, the use of the environment are linked to from our years of application experience, combined with the system of type (one-way transmission control, by the master to slave), we generally recommend the following configuration, refer to the configuration of wireless data transmission principle is to directly transfer the data direct transmission, not as much as possible the construction of relay station .

5KM wireless RS485 data transmitter

A, comprehensive index
Working frequency: 150MHz, 230 MHz, 350MHz, 450 MHz
Frequency stability: ± 2.5ppm
Channel spacing: 25KHz
Antenna Impedance: 50Ω
Ambient temperature: -30 ℃ ~ +60 ℃
Frequency settings: DIP switch or computer to write frequency
Data transfer rate: 1200bps/2400bps/4800bps/9600bps

B, receiving indicator
Usable sensitivity: ≤-120dBm (12dB SINAD)
Residual level output: ≤-45dB
Receiver Bandwidth Modulation: ≥ 5KHz
Adjacent channel selectivity: ≥ 65dB
Intermodulation Immunity: ≥ 60dB
Spurious Response Immunity: ≥ 65dB
Demodulated output: ≥ 0.2V audio voltage

C transmission targets
Modulation: FSK / MSK
Transmit Power: 1W 5W
Modulation Distortion: ≤ 3%
Modulation Sensitivity: 100mV (3KHz offset)
Adjacent channel power ratio: ≥ 65dB
Spurious frequency components: ≤-65dB

D, Power supply
DC voltage: 12V or 8V
Wait for current: ≤ 50 mA
Launch the work of current: ≤ 1.6 A (transmit power to 5W

 
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