TFS402

This is the description about TFS 402 of the VI filter specification. Reference level for the relative attenuation arel of the TFS 402 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 reference frequence fc is the arithmetic mean value of the upper and lower frequencies at the 6 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 402, 76 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 a production tolerance for the centre frequency fc.

Here are the TFS402 features: Ambient temperature is 25°C. Input power level is 0dBm. Terminating impedances for input is 50; for output is 50.

The TFS402 absolute maximum ratings are these (TA = 25°C). Insertion loss (Reference level) is max 24 dB. Nominal frequency is 402,76 MHz. Reference frequency fc at ambient temperature (fCTA) is 402,76 ± 1 MHz. Pass band (-1 dB) in the operating temperature range is fN - 15,25 MHz ... fN + 15,25 MHz.. Amplitude ripple in pass band (p-p)is max. 1,0 dB. Amplitude ripple with sliding interval 1 MHz in pass band (p-p) is max. 0,5 dB. Operating temperature range is from -40 ° to +85° C. Storage temperature range is from -40 ° to +85° C. Temperature coefficient of frequency is - 72 ppm/°C.

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