TFS117

TFS117 is a kind of VI telefilter. There are some information about the measurement condition. The ambient temperature is 23. The input power level is 0 dBm.

What comes next is about the characteristics of TFS117. The maximum insertion loss (Reference level)) (ae) is 8 dB. The nominal frequency (fN) is 117,4 MHz. The maximum pass band ripple within fN ± 90 kHz is 1 dB. The typical centre frequency is 117,4 MHz. The maximum arel (Relative attenuation) is 1 dB at fN to fN ± 90 kHz and 3 dB at fN ± 90 kHz to fN ± 200 kHz. The minimum arel is 20 dB at fN ± 1,8 MHz to fN ± 6,0 MHz, 35 dB at fN ± 6,0 MHz to fN ± 30,0 MHz and 20 dB at fN + 30,0 MHz to fN ± 200,0 MHz. The maximum input power level is 10 dBm. The operating temperature range is from -10 to +85.

The last one is about the remarks of TFS117. Reference level for the relative attenuation arel of the TFS117 is the minimum of the pass band attenuation amax. The maximum of the pass band attenuation amax is defined as the insertion loss ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 3dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 117,40 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.