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20w two way voice vehicle transmitter
  • 20w two way voice vehicle transmitter
  • 20w two way voice vehicle receiver

20W Vehicle-mounted SD two way audio wireless video transmission system


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, 25f/s
 Special function Two way audio
 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:

  • Two way audio function

  • 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.

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20W Vehicle-mounted SD two way audio wireless video transmission system


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20W Vehicle-mounted SD two way audio wireless video transmission system

RF demodulation part
Working frequency 138MHz~4400MHz, customized
 Audio frequency 145-152MHz, 223-235MHz(optional)
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 mode Manual operation AES double encryption
System part
Standard MPEG-2
Rate 1.5Mbps~6Mbps
Error rate ≤10
Transmission distance Onboard application >130 km; Marine application: > 70 km;City application >10km; Suburban application >20 km
Audio video part
Compressed format MPEG-2
Video input PAL/NTSC
Audio input Left and right channel
 Audio output  Line MIC
Resolution 720*576,  25 fps
Audio/ Video input physical interface BNC female interface
Other  part
 Display  LCD for adjust parameter
Power supply AC 220V
Size 485×340×90 mm(L×W×H)
Weight 5kg

Receiver model: ST6202R

 Vehicle-mounted SD wireless video transmission system


RF demodulation part
Frequency 138MHz~999MHz
 Audio frequency  145-152MHz, 223-235MHz(optional)
Demodulation technology COFDM
Bandwidth 2/2.5/4/8MHz
Receiving sensitivity 2MHz@-103dBm/2.5MHz@-102dBm/4MHz@-100dBm/8MHz@-97dBm
System part
 RSSI  Received signal indicator
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 audio output HDMI
 Analog audio input  Line MIC
Resolution 720*576,  25 fps
Audio/ Video output physical interface BNC female interface, HDMI
Audio input physical interface Aviation connector
Other  part
Power AC 220V
Size 1U, 19inch crate, 480*280*45mm
Weight 4.0kg


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