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| 01 april 2008 specification for crystal filter: q f 4 . 9 9 8 5 - 0 0 1 5 / 0 8 1. general 1.1. package : 1.2. type name: qf 4 . 9985 - 00 15/08 1.3. number of poles: 7 1.4. operating temperatu re range: 0 c to + 7 5 c 1.5. storage temperature range: - 4 5c to + 85 c 2. electric values 2.1. n ominal centre frequency fo: 4 . 9985 mhz 2.2. pass band 2.2.1. bandwidth between 3 db frequencies: > fo ? 0.075 k hz 2.2.2. ripple a t fo ? 0.075 khz : gaussian 2.2.3 . insertion loss: < 8 .0 db ( measured on smallest attenuation in pass band ) 2.3. stop band 2.3.1. fo ? 0.4 khz > 6 0 db 2.3.2 . alternate attenuation: > 8 0 db 2.4. terminating impedance ( inpu t and output ): 50 ? // 0 pf 2.5. out band intermodulation - input power level: - 10 dbm - frequencies: fo ? 500 hz / fo ? 1 khz - intermodulation > 80 db 3 . marking : m anufacturer , date code qf 4 . 9985 - 0015/08 4. environm ent conditions: corresponding to vectron standard cf001 ______________________________________________________________________________________ edited by: date: ________ ________ ______________ name: ______ _______ ____________________
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