Descriptions: A band-pass filter is a device that allows a particular frequency band to block other frequencies simultaneously. In the circuit and electronic high frequency system, there is a good frequency filtering effect, and can suppress the signal and noise outside the band. Features: A band-pass filter is a device that allows a particular frequency band to block other frequencies simultaneously. It is made of high quality metal, with sturdy structure. Many audio device of spectrum analyzer are using this circuit as a band-pass filter, to choose different frequency band signal, by the number of leds light up on the display indicates that the amplitude of the signal. In the circuit and electronic high frequency system, there is a good frequency filtering effect, and can suppress the signal and noise outside the band. High reliability, stable and reliable performance in full temperature range. Specifications: Input and output interface: SMA 50 Central frequency: 1090 MHz Pass band (3 dB bandwidth) : 14 MHz Insertion Loss :