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20W Vehicle SD COFDM video transmitter
  • 20W Vehicle SD COFDM video transmitter
  • COFDM video receiver

20W Vehicle-mounted narrow-bandwidth SD COFDM wireless video transmitter

Model:ST6220CZ-SD

Frequency  138MHz~4400MHz, customized
Output power 10~30W, customized
Modulation COFDM
Bandwidth  2/2.5/4/8MHz

Transmission distance 

Airborne area 130Km;                              Marine area  70Km;                                  Urban area  10Km;                                   Suburb area  20Km

Image resolution

720*576, the frame rate is 25f/s

Weight

 5kg

 

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  • Product parameters
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Product introduction:

ST6220CZ vehicle-mounted narrow-bandwidth wireless image real time transmission system(strict conformance with police department transmission frequency band requirement: 2MHz frequency band), it adopts COFDM modulation technology and combine with foreign advanced diversity reception technology. It has higher sensitivity,  farther transmission distance and stronger anti-interference performance than 8MHz products. It is mostly used for NLOS or complicated working environment. 

AV coding adopt MPEG-2 standard, definition reach to DVD resolution ratio(720*576@ PAL / 720*480@ NTSC). The advantage of the product includes clear image quality, good color performance and smooth image.

Product feature:

  • Suitable for wireless audio & video transmitting in long distance. As it adopts 2MHz wireless frequency band, it has higher requirements about the coding stream rate. And it also reduces the channel rate, increase the sensitivity receiving limitation, with stable signals.
  • COFDM anti-electromagnetic interference performance
  • COFDM anti-multipath fading performance

Product advantages:

  • 2MHz wireless bandwidth transmission, DVD video image quality.
  • Dual AES encryption can be set manually
  • It comes with display to show the parameters, adjustable parameters
  • Longer wireless transmission distance, about 1/3 longer than the 8MHz bandwidth products
  • Transmit audio video stably when the equipment moving fast and with much interference.
  • Powerful non line-of-sight transmission capacity 
  • With spatial diversity reception capability
  • Can customize all kinds of product form

Product application

This product has wide application, such as Public security, Fire control, traffic, Civildefense emergency, City management、Environment monitoring, Flood control、Electricity rescue、Railway rescue、Maritime law enforcement、Maritime surveillance inspections、Customs and Border Protection、Pier monitoring、Forest Fire、Oilfield theft、Military reconnaissance、living broadcast, and so on.  It is suitable for urban area, seaborne, mountainous region and other complex environment high quality image mobile transmission.

Vehicle-mounted equipment application: 

Used in man to car ,man to control center. This equipment has transmit power and long transmit distance ,can do a wide range of mobile image transmission, distance can up to 90km in line of sight.

Application mode:

Transmission path: TX~ communication command vehicle ~ local command centre ~ network to provinces and cities command centre. At the front end, workers carry the transmitter to transmit the site audio, video signals to communication command vehicle; Then, the communication command vehicle as repeater to extend the wireless signals to local command centre; Last, in the local command centre, customers can access one channel av signals into monitor to realize real time monitoring and control. For another av signals, it can be transmitted to all provinces and cities by MAN or WAN command centre. In the command centre, customers can also access the signals into PC to view av signals and record.

Sketch map

Vehicle-mounted narrow-bandwidth SD COFDM wireless video transmission system

 

Topological graph

Vehicle-mounted narrow-bandwidth SD COFDM wireless video transmission system

Transmitter
RF demodulation part
Working frequency 138MHz~4400MHz, customized
Output power 10~30W, customized
Modulation COFDM
Bandwidth 2/2.5/4/8MHz
MPE-FEC FEC@Viterbi (1/2, 2/3, 3/4)
Guard Interval 1/32, 1/16, 1/8, 1/4
Encryption Dual AES encryption can be set manually
System part
Standard H.264/MPEG-2
Rate 1.5Mbps~6Mbps
Error rate ≤10-6
Transmission distance Onboard application >130 km;Marine application: >60 km;City application >10km;Suburban application >20 km
Audio video part
Compressed format H.264/MPEG-2
Video input PAL/NTSC
Audio input Left and right channel
Resolution 720*576,  25 fps
Video input physical interface BNC female interface
Audio input physical interface BNC female interface
Other  part
Power supply AC 220V
Size 485×340×90 mm(L×W×H)
Weight 5kg

COFDM Wireless receiver

Model: ST6200RU

Receiver
RF demodulation part
Frequency 138MHz~999MHz
Demodulation technology COFDM
Bandwidth 2/2.5/4/8MHz
Encryption Dual AES encryption can be set manually
Receiving sensitivity 2MHz@-103dBm/2.5MHz@-102dBm/4MHz@-100dBm/8MHz@-97dBm
Signal strenth Receiver has LCD display to show the Signal strength indication
System part
Receiving polarization Vertical polarization, dual antennas receiving
Receiving  technology Space diversity reception technology
Filtering technology Built-in high-performance cavity filter technology
Audio video part
Decompression format H.264/MPEG-2
Video output PAL/ NTSC
Audio output Left and right channel
Digital av output HDMI
Resolution 720*576,  25 fps
Video output physical interface BNC female interface, HDMI
Audio output physical interface BNC female interface, HDMI
Other  part
Display It comes with LCD display to show the signal strength indication, adjust parameters
Power AC 220V
Size 1U, 19inch crate, 480*280*45mm
Weight 4.0kg

 

 

 
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