Broadcast Microwave Services Inc CCII-4H Benutzerhandbuch

 

 

Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 

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Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 

Email: 

support@bms-inc.com

   Web: 

www.bms-inc.com

 

 

 

 
Typical system the 4GHz Carry-Coder II with Power Amplifier is shown in Figure 3. 
 

  

Figure 3 

Typical system of 4GHz Carry-Coder II with Power Amplifier  

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The system of Figure 3 can demonstrate both mobile and fixed applications. The transmitter part including the Carry-Coder 
II Transmitter, Power Amplifier and the video camera are all mounted inside a truck.  

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An omni-directional antenna placed on the vehicle roof-top (without any obstruction) transmit uniformly in all azimuth 
directions. This allows the mobile transmitter to communicate with the Receive Site while the vehicle is moving freely. 

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In the Receive Site the omni-directional antenna on the mast will receive the transmitter signal without any need for 
tracking. 

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Because of low antenna gain (both on transmit and receive ends) the Power Amplifier will be crucial in order to boost the 
transmitter power and ensure the minimum practical range. 

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When the Transmitter Unit is stationary (i.e. the vehicle is stalled for a while) then the tracking dish antenna in the Receive 
site will be able to track the transmitter and establish a line of site transmission. This is considered a fixed situation and the 
high gain of the dish antenna will increase the minimum range. In the fixed platform the transmitter antenna can be 
changed from omni to a tracking dish antenna.