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TV Relative Signal Strength Meter(BC337)

2017-08-10 22:56  
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This article describes TV Relative Signal Strength Meter (BC337). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: BC337.

This circuit was designed to assist the installation of TV antennas. The signal is monitored using a small portable TV set and this circuit monitors the output of the TV’s FM detector IC via a shielded lead. To initially calibrate the meter, adjust trimpot VR2 to zero the meter. Trimpot VR1 is a sensitivity control and can be set for a preset reading (ie, 0dB) or can be calibrated in millivolts. Rotating the antenna for a minimum reading on the meter (indicating FM quieting) gives the optimum orientation for the antenna.

Figure:1 TV Relative Signal Strength Meter Circuit Diagram

Figure 1 TV Relative Signal Strength Meter Circuit Diagram

 

 


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