TFS342

      The TFS342 is designed as VI telefilter.
      Reference level for the relative attenuation arel of the TFS 342 is the minimum of the pass band attenuation amin. The minimum of the pass band attenuation amin is defined as the insertion loss ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 2.0 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 342,5 MHz without tolerance. The given values for the relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below also if the centre frequency fc is shifted due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance for the centre frequency fc.
      Some important specifications of TFS342 have been concluded into several points as follow. The first one is about its insertion loss which would be typ 9.5dB and max 11dB. The next one is about its nominal frequency which would be max 342,5 MHz. The next one is about its pass band which would be typ 1.2 dB and max 2.0 dB. The next one is about its group delay which would be typ 80ns and max 150ns. The next one is about its relative attenuation which would be typ 40dB and min 35dB from fN - 341,5 MHz to fN - 20,0 MHz and would be typ 35dB and min 30dB from fN + 20,0 MHz to fN + 40,0 MHz and would be typ 40dB and min 35dB from fN + 40,0 MHz to fN + 207,5 MHz and would be typ 50dB and min 27dB from fN + 207,5 MHz to fN + 657,0 MHz. The next one is about its input compression which would be +12dBm. The next one is about its input intermodulation which would be min +35dB. The next one is about its operating temperature range which would be from -25 °C to + 85 °C. The next one is about its temperature coefficient of frequency which would be typ -72 ppm/K. The last one is about its input power level which would be max. +10 dBm. And so on. For more information please contact us.