TFS140K

      TFS140K is a kind of VT telefilter.Here you can get some information about the measurement condition.The ambient temperature (T_A) is 45.The input power level is 0 dBm.The terminating impedances in fc is 50//0 pF for input and output.
      What comes next is about the TFS140K characteristics.The typical insertion loss (Reference level) (a_e) is 28 dB and the maximum is 31 dB.The norminal frequency at 45 (f_N) is 140 MHz.The typical centre frequency (f_CTA) is 140 MHz and the tolerance is 140,000±0,250 MHz.The typical pass band (PB) is from f_N-21 MHz to f_N+21 MHz.The amplitude ripple in PB(p-p) () is 0.2 dB and the maximum is 0.6 dB.Then is  about the bandwidth at ambient temperature.The minimum 1 dB - band width (B_1dB) is 45 MHz and the typical is 45,50 MHz and the maximum is 46 MHz.The minimum 3 dB - band width (B_3dB) is 48 MHz and the typical is 48,28 MHz and the maximum is 49 MHz.The typical 40 dB - band width (B_40dB) is 59,80 MHz and the maximum is 60 MHz.The maximum relative attenuation (a_rel) is 0,6 dB at f_N-21 MHz to f_N+21 MHz.The maximum arel is 1.0 dB at f_N ±21 MHz to f_N ±22.5 MHz.The minimum arel is 1 dB at f_N ±23 MHz to f_N ±24.5 MHz.The maximum arel is 3 dB at f_N ±22.5 MHz to f_N ±24 MHz.The minimum arel is 3 dB at f_N ±24.5 MHz to _fN ±30 MHz.The minimum arel is 40 dB and the typical is 50 dB at f_N - 130 MHz to f_N- 30 MHz.The typical reflected attenuation compared to main signal is 60 dB and the minimum is 50 dB.The typical crosstalk attenuation compared to main signal is 55 dB.The typical triple transit attenuation compared to main signal is 60 dB.The maximum input power level is 15 dBm.tempThe operating erature range is from -40 to + 85.The storage temperature range is from -40 to + 85The typical temperature coefficient of frequency (T_cf) is -72 ppm/K.
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